These 60 selected concepts connect primary-care principles with assessment, prevention, treatment selection and professional responsibilities relevant to the Diploma of Primary Care Dentistry RCSI. Each concept includes a focused distinction, an original worked example and an error to avoid. Syllabus associations identify related objectives, not mastery of an entire clinical competency.
Assessment foundations and diagnostic imaging
1. Separate oral-cavity and oropharyngeal anatomy
The oral cavity and oropharynx are separate regions divided at the circumvallate papillae: the anterior two-thirds of the tongue is oral cavity, the base is oropharynx. Oncogenic HPV is a major risk factor for oropharyngeal cancer rather than oral cancer, while tobacco and alcohol dominate oral-cavity risk. Site informs classification and risk discussion but does not by itself establish diagnosis or cause.
Worked example: A smoker presents with an ulcerated lesion on the mobile tongue, anterior to the circumvallate papillae. The dentist classifies it as an oral-cavity lesion, documents tobacco and alcohol use as relevant risk factors, and refers for specialist assessment without attributing an HPV cause.
Mistake to avoid: Assuming a tongue-base cancer and an anterior tongue cancer carry the same HPV association simply because both arise from tongue tissue.
Reference: [13]
2. Distinguish pulp sensibility from blood supply
Cold and electric pulp tests assess neural activity, not vascular supply. After luxation injuries, transient loss of neural response is frequent, and immature teeth may give unreliable responses, so a negative result alone is inconclusive. Baseline testing as soon as practical and repeat testing at each review, alongside clinical and radiographic findings, support interpretation over time.
Worked example: A child with a luxated immature incisor shows no cold response at the emergency visit. The dentist records this baseline finding as inconclusive, explains that neural recovery may occur, and plans sensibility testing at each scheduled review instead of diagnosing necrosis from one test.
Mistake to avoid: Recording one negative cold test immediately after a luxation injury as proof of pulp necrosis and acting on that single finding.
Reference: [16]
3. Establish the clinical question before imaging
History and a thorough clinical examination should define the diagnostic question before any imaging is selected, because radiographs support but cannot independently establish a complete diagnosis and treatment plan. The ADA and AAOMR selection recommendations are clinical guidance rather than regulatory requirements, and a good-faith attempt should be made to use suitable existing images before acquiring new ones.
Worked example: An adult reports localised discomfort in one quadrant. History and examination leave a diagnostic question unresolved. The dentist reviews suitable existing images first and, finding they cannot answer the question, requests targeted imaging of that region rather than a routine set.
Mistake to avoid: Exposing a patient to a standard full-mouth image series at the first visit before any history or examination has defined the question.
Reference: [12]
4. Individualise radiographic review intervals
Radiographic review intervals depend on current oral health, age, disease risk and any signs or symptoms, so elapsed time alone is not an indication. A good-faith attempt should be made to reuse previous images when they suit the current question, and digital receptors are preferred over conventional film to help keep exposure as low as reasonably achievable.
Worked example: Two patients last received images three years ago. One has high caries risk and new symptoms; the other is low-risk and asymptomatic. After assessment, the dentist images the higher-risk patient and, where existing digital images remain suitable, continues reviewing the low-risk patient without new exposures.
Mistake to avoid: Recalling a patient for radiographs purely because a fixed calendar interval has elapsed, without assessing current risk, symptoms or existing images.
Reference: [12]
5. Reserve CBCT for a necessary diagnostic gain
CBCT should be selected only when appropriate lower-exposure options cannot supply the necessary diagnostic information and the expected clinical benefit outweighs the risks of ionising radiation. Justification is patient-specific, with particular caution for children and adherence to applicable local radiation requirements. Three-dimensional detail alone does not justify exposure.
Worked example: A patient with an impacted canine has panoramic and periapical images that already show position and root relationships for planning. The clinician documents that lower-exposure imaging answers the question and does not request CBCT, noting that added three-dimensional views would not change management.
Mistake to avoid: Ordering CBCT for routine assessment because the three-dimensional reconstruction looks more impressive, without identifying any diagnostic question that lower-exposure images failed to answer.
Reference: [12]
6. Recognise exposure creep in digital imaging
Digital receptors generally allow lower exposure than film, but the operator can raise exposure to reduce perceived noise, a pattern called exposure creep. Optimisation should follow device-specific settings, manufacturer guidance, and training rather than dose increases, so a noisy image prompts review of acquisition options, not automatic escalation.
Worked example: After a digital periapical image appears grainy, the operator reviews receptor positioning, sensor sensitivity settings, and processing options with the manufacturer documentation before considering any change to exposure, keeping the dose advantage of digital acquisition intact.
Mistake to avoid: Increasing exposure whenever a digital image looks noisy, assuming the modality guarantees a low dose regardless of the settings chosen.
Reference: [12]
Evidence interpretation and community prevention
7. Identify where recommendations rely on consensus
Guidelines often blend research evidence with expert or consensus recommendations where data are insufficient or inconclusive. Some documents explicitly designate expert-opinion recommendations without an assigned strength, yet still regard them as standard professional practice. Readers should check the evidence designation for each recommendation rather than treating the whole document as trial-tested.
Worked example: A sedation guideline recommends a specific staffing arrangement and labels it expert opinion without an assigned strength. A dentist citing it describes the recommendation as an important professional safety standard while accurately stating that it was not derived from randomised trial evidence.
Mistake to avoid: Describing every statement in a guideline as high-certainty research evidence, ignoring that some recommendations rest on expert consensus.
8. Check the setting behind diagnostic evidence
Studies of oral-lesion adjuncts, including light-based devices, were conducted mainly in referral clinics and cancer centres with high-baseline-risk patients, so performance in lower-risk general populations remains uncertain. Current evidence does not support using light-based adjuncts to decide biopsy or referral; clinical assessment drives those decisions.
Worked example: An adult with a persistent ulcerated tongue lesion undergoes a light-based adjunct examination that appears negative. The clinician still arranges specialist referral because the concerning clinical features govern the decision, recognising that the adjunct result cannot exclude the need for diagnostic follow-up.
Mistake to avoid: Reassuring a patient with a suspicious mucosal lesion because a light-based adjunct result appeared negative, overruling the clinical examination.
Reference: [13]
9. Connect clinical prevention with home and community support
Preventive care for children at increased caries risk can extend beyond the surgery by drawing on local home or community support for toothbrushing, dietary advice and encouraging attendance. Availability varies by area, so Scottish programme names do not guarantee equivalent services elsewhere. When caries remains uncontrolled despite this, reassessment should weigh both additional support and alternative management options rather than repeating unchanged advice.
Worked example: A six-year-old develops two new interproximal lesions while her parents report difficulty establishing an evening brushing routine. The dentist records which local support services are actually available, arranges liaison where appropriate, and reassesses whether the current caries management approach remains suitable.
Mistake to avoid: Repeating identical dietary advice at every recall without ever assessing whether the family can access or sustain practical support services locally.
Reference: [5]
Child caries prevention and management
10. Assess lesion activity separately from lesion extent
Lesion activity is a clinical judgement made for each lesion, while radiographs contribute by showing whether lesions have progressed between images taken over time. Under the SDCEP child guidance, lesions are assumed active unless there is positive evidence of arrest. Radiographic extent informs management planning, such as proximity to the pulp, but by itself does not establish whether a lesion is active or arrested.
Worked example: A bitewing reveals a lesion extending towards the pulp of a primary molar, with no previous images available and no clinical signs of arrest. The dentist manages it as active, while the recorded extent guides the choice of management strategy.
Mistake to avoid: Recording a lesion as arrested solely because the child reports no pain, without clinical evidence of arrest or serial radiographic comparison over time.
Reference: [5]
11. Use caries risk to intensify prevention
Every child should receive Standard Prevention matched to their age. When assessment identifies increased caries risk, Enhanced Prevention is added on top of Standard Prevention unless a valid reason prevents this, in which case the reason is documented. Caries risk is reassessed at each assessment, so intensification follows current findings, and specific fluoride products, concentrations and schedules require the full guidance.
Worked example: At reassessment, a four-year-old previously at lower risk is found to have new early lesions and frequent sugary snacking. Enhanced Prevention measures are added while Standard Prevention continues unchanged, and the increased risk status is recorded for review at the next visit.
Mistake to avoid: Treating an increased-risk label as permanent, or substituting isolated extra measures for the Standard Prevention that must continue for every child.
Reference: [5]
12. Match brushing support to actual ability
Children should brush, or have their teeth brushed, at least twice daily using fluoride toothpaste, with the amount and concentration matched to age and caries risk. Supervision by a caregiver continues until the child can brush effectively, which is judged by actual cleaning performance rather than age alone. Rinsing the mouth after brushing is discouraged, supporting the spit, don't rinse message.
Worked example: An eight-year-old insists on brushing alone, but assessment shows plaque and missed posterior surfaces. The plan keeps caregiver supervision in place, with a hands-on demonstration of technique, until effective cleaning is confirmed at a later review appointment.
Mistake to avoid: Ending supervised brushing simply because the child has reached a particular birthday, without checking whether brushing is actually effective.
Reference: [5]
13. Select and maintain fissure sealants individually
Sealant decisions should weigh all factors relevant to the individual patient rather than follow a fixed rule. Resin-based sealants are the first-choice material. Within Enhanced Prevention, glass ionomer may be considered as a temporary sealant on partially erupted first or second permanent molars until full eruption, subject to cooperation and eruption status, and existing sealants require review for wear and leakage at every recall visit.
Worked example: A child at increased risk has a first permanent molar only partly erupted. Temporary glass ionomer sealing may be considered under Enhanced Prevention, with reassessment planned as eruption progresses and resin-based material or review arranged once the tooth is fully erupted.
Mistake to avoid: Treating sealant placement as a permanent intervention that needs no maintenance, and omitting review of existing sealants at recall visits.
Reference: [5]
14. Choose primary-tooth care around exfoliation and infection risk
For a carious primary tooth, choose the least invasive feasible management strategy, weighing time to exfoliation, lesion site and extent, risk of pain or infection, presence of infection, tooth structure preservation, number of teeth affected and avoidance of treatment-induced anxiety. Least invasive means feasible and appropriate, not automatically non-operative, and primary teeth should not be left with unmanaged caries or infection.
Worked example: A primary molar shows caries with an uncertain remaining lifespan before exfoliation. Management weighs the likelihood of pain or infection developing before natural exfoliation, rather than dismissing the tooth as temporary and leaving the lesion without a planned strategy.
Mistake to avoid: Assuming that eventual exfoliation makes management unnecessary and leaving caries or infection in a primary tooth unmanaged.
Reference: [5]
15. Distinguish pulpotomy from pulpectomy
Pulpotomy describes pulp therapy in which instrumentation is confined to the coronal pulp chamber, while pulpectomy extends instrumentation to include the root canal system. In SDCEP terminology, root canal therapy comprises pulpectomy plus permanent restoration of the root canals and crown. These definitions clarify terminology only; they do not establish indications for either treatment or provide procedural instructions.
Worked example: During pulp therapy on a primary molar, instrumentation remains limited to the coronal pulp chamber with no entry into the root canals. The procedure is therefore recorded as a pulpotomy, and the distinction is explained clearly in the clinical notes.
Mistake to avoid: Using pulpotomy and pulpectomy interchangeably, which obscures whether instrumentation entered the root canal system during pulp therapy.
Reference: [5]
16. Recognise the qualified permanent-tooth pulpotomy option
SDCEP conditionally recommends, on low certainty evidence, considering pulpotomy for a child or young person in pain from pulpitis in a vital permanent tooth showing irreversible symptoms with no evidence of dental abscess. This is an option requiring case assessment, valid consent and appropriate clinical competence, not a universal treatment rule, and it does not extend to abscessed or non-vital teeth.
Worked example: A teenager presents with pain from a vital permanent molar showing irreversible pulpitis symptoms, and no abscess is evident. Pulpotomy is an option to assess alongside other management, subject to case assessment, consent and confirmed clinical competence, rather than being automatically excluded.
Mistake to avoid: Extending the pulpotomy recommendation to a tooth with a dental abscess or loss of vitality, where the stated conditions are not met.
Reference: [5]
17. Assess hypomineralised first molars over a lifetime
First permanent molars affected by caries or molar incisor hypomineralisation require comprehensive prognosis assessment guiding both immediate and long-term planning. When extraction is considered, second permanent molar eruption status matters, because an unerupted second molar may ultimately replace it. Poor prognosis does not automatically mandate extraction; orthodontic and occlusal development remain relevant, and the enamel defect alone cannot justify the decision.
Worked example: A nine-year-old attends with a hypomineralised first permanent molar showing sensitivity and breakdown while the second molar is unerupted. The dentist documents lifetime prognosis, orthodontic implications and occlusal development, then agrees a staged plan with the child and carer before choosing between restoration and extraction.
Mistake to avoid: Recommending extraction solely because the enamel appears hypomineralised, without assessing lifetime prognosis or whether the second molar has erupted.
Reference: [5]
Periodontal and implant care
18. Use periodontal screening to trigger fuller assessment
All dentate patients should be screened for periodontal disease at every routine examination. BPE scores of 3 or 4 signal that a more detailed periodontal assessment is needed; the screening score itself does not constitute a complete periodontal diagnosis or establish disease stage, which requires fuller assessment.
Worked example: During a routine check-up, a hygienist records a BPE code of 4 in one sextant of a dentate adult smoker. Rather than labelling the disease stage from the code, the team arranges a detailed periodontal assessment including probing depths, radiographs and risk-factor evaluation before diagnosis.
Mistake to avoid: Recording a BPE 4 and telling the patient they have severe periodontitis without carrying out any detailed periodontal assessment first.
Reference: [4]
19. Record a multidimensional periodontitis diagnosis
For patients diagnosed with periodontitis, the recorded diagnostic statement should include disease type, extent, stage, grade, current periodontal status and a risk-factor profile. Collapsing these dimensions into a single severity label loses information needed for individualised care, monitoring and communication, so each dimension should be documented separately in the clinical record.
Worked example: At review, a practice audit finds a record stating only periodontitis for a patient with generalised attachment loss and type 2 diabetes. The reviewing clinician completes the statement, documenting extent, stage, grade, current stability and a risk-factor profile covering smoking and glycaemic control.
Mistake to avoid: Writing only moderate periodontitis in the notes, omitting extent, stage, grade, current status and the risk-factor profile.
Reference: [4]
20. Combine periodontal self-care with risk-factor control
Periodontal management combines effective plaque removal with control of modifiable systemic risks such as smoking and diabetes. Patients with periodontitis should clean interdentally every day, using appropriately sized interdental brushes where space allows and floss where spaces are too small; patients with gingival inflammation but no periodontitis receive individually tailored advice instead.
Worked example: A patient with periodontitis has wide interdental spaces at the molar sites and tight contacts anteriorly. Advice specifies daily cleaning with correctly sized interdental brushes posteriorly and floss anteriorly, alongside a smoking cessation discussion and medical review of diabetes control with the physician.
Mistake to avoid: Telling every patient to use floss daily regardless of interdental space size or whether periodontitis has been diagnosed.
Reference: [4]
21. Select instrumentation around the patient and treatment goal
Subgingival professional mechanical plaque removal for diagnosed periodontitis may be delivered with powered instruments, manual instruments, or a combination of both, provided it is performed to a high standard. The choice should reflect clinician and patient preferences, the clinical situation, and the goal of treatment. This principle concerns appropriately performed PMPR and does not by itself establish technique or competency.
Worked example: A patient reports discomfort with powered scaling at several sites but tolerates hand instrumentation well there. The clinician completes those sites manually, uses powered instrumentation elsewhere, and the mixed approach achieves the planned subgingival plaque removal goal.
Mistake to avoid: Claiming that one instrument category, such as powered scalers, is mandatory for every patient regardless of preferences, the clinical situation, or the treatment goal.
Reference: [4]
22. Keep periodontal antibiotics outside routine adjunctive care
Routine periodontitis management should not include adjunctive systemic antibiotic therapy. However, selected patients whose disease suggests high susceptibility, such as younger patients with Grade C periodontitis showing little or no improvement after non-surgical treatment, may warrant specialist assessment for possible adjunctive therapy; this group illustrates referral consideration rather than exhausting eligibility. Referral consideration does not establish automatic prescribing within primary care.
Worked example: A young adult with Grade C periodontitis shows little improvement after completed non-surgical treatment. Rather than prescribing antibiotics routinely, the dentist discusses the case and considers referral for specialist assessment of possible adjunctive systemic therapy.
Mistake to avoid: Prescribing adjunctive systemic antibiotics in routine periodontal care because a patient has Grade C periodontitis alone, without considering whether referral might benefit this patient.
Reference: [4]
23. Assess furcation involvement without automatic extraction
Furcation involvement alone is not an indication for extraction. Non-surgical treatment aims at medium to long-term retention, particularly for teeth holistically assessed as having ongoing value to the patient and their dentition. Some Grade II or III cases may require referral or surgical management. Retention decisions weigh the tooth's ongoing value and are not guaranteed.
Worked example: A strategically important first molar shows Grade II furcation involvement. The dentist assesses its overall prognosis, restorability, and value to the dentition, then provides non-surgical treatment aiming for medium to long-term retention while keeping referral options open.
Mistake to avoid: Equating any furcation finding with a hopeless tooth and planning extraction without holistic assessment of prognosis and the tooth's ongoing value.
Reference: [4]
24. Provide periodontal maintenance after active therapy
Patients who have completed active periodontal therapy for diagnosed periodontitis should receive regular supportive periodontal care to maintain disease stability. This regime comprises updating patient histories, assessing risk factor control, oral tissues and care needs, and providing treatment where necessary. Recall intervals range from 3 to a maximum of 12 months, individualised by clinical history, risk assessment, and patient needs and wishes.
Worked example: Two patients complete active therapy: one with well-controlled risk factors and stable tissues, another with persistent inflammation. Their supportive care intervals are set individually within the 3 to 12 month range according to history, risk, and wishes.
Mistake to avoid: Describing completed active treatment as the end of periodontal care, or assigning identical fixed recall intervals to every treated patient without individual risk assessment.
Reference: [4]
25. Stabilise periodontal disease before implant placement
For a patient with periodontitis considering implants, counsel that periodontitis increases the risk of peri-implant disease. Before implant placement, stabilise periodontal disease around retained teeth and address modifiable risks such as inadequate oral hygiene, smoking and systemic disease; planning may include this preceding stabilisation and risk-reduction phase. Explain the need for ongoing periodontal and implant maintenance.
Worked example: A patient with treated but historically unstable periodontitis asks about replacing a missing molar with an implant. The counselling discussion notes increased peri-implant disease risk, and the plan sequences stabilisation of disease around retained teeth and risk factor review before any placement decision.
Mistake to avoid: Planning implant treatment for a periodontitis patient without discussing increased peri-implant disease risk or the need for ongoing maintenance care.
Reference: [4]
Restorative materials and prosthodontic decisions
26. Classify restorations by fabrication rather than visit count
Direct restorations are generally placed directly onto tooth structure without laboratory preparation, while indirect restorations are fabricated outside the tooth. In-office CAD/CAM can produce an indirect ceramic restoration within a single visit, so fabrication method, not the number of appointments, determines the classification.
Worked example: A ceramic onlay is designed, milled and fitted in the practice during one appointment. Because it was fabricated outside the tooth using in-office CAD/CAM, it is classified as indirect even though no separate laboratory visit was needed.
Mistake to avoid: Labelling any restoration completed in a single appointment as direct, ignoring that in-office CAD/CAM milling produces an indirect restoration.
27. Connect resin polymerisation shrinkage with marginal risk
Methacrylate resin polymerisation naturally produces shrinkage, which may contribute to marginal gaps and weakening of the bond between composite and tooth structure. This describes a possible risk mechanism rather than a certain outcome, and curing and placement requirements depend on the particular material and its manufacturer instructions.
Worked example: While reviewing a methacrylate composite restoration with marginal staining, the dentist recognises polymerisation shrinkage as a possible contributor to the marginal gap, while noting this mechanism does not prove the restoration has failed and following the material instructions for any repair.
Mistake to avoid: Treating polymerisation shrinkage as proof that every composite restoration will develop marginal gaps and fail.
Reference: [7]
28. Balance flowability against wear and shrinkage
Reducing filler density lowers viscosity, improving flow and adaptation to cavity structure, but flowable composites have increased susceptibility to wear and polymerisation shrinkage compared with higher-density packable composites. They are typically used as liners or bases or in low-stress applications, and newer product indications must be checked separately.
Worked example: A clinician considers a flowable composite for a heavily loaded posterior restoration because it handles easily. Ease of flow does not establish suitability, so the specific product indications for load-bearing use are checked before selection, since general distinctions may not cover newer formulations.
Mistake to avoid: Selecting a flowable composite for a high-stress posterior restoration solely because its easy handling makes placement convenient.
Reference: [7]
29. Match indirect material and cementation to the case
Indirect restorative materials vary in composition, mechanical behaviour, processing route and clinical indication, so material choice and cementation are assessed together for each case. Some restorations are conventionally cemented while others need adhesive bonding, depending on material properties and the clinical scenario; the evidence does not fix a specific cement, surface-treatment protocol or preparation design, and a tooth-coloured appearance alone does not dictate the bonding approach.
Worked example: A clinician plans two crowns that look alike but are made of different ceramic systems; each is checked for its own material properties and cementation needs, without copying the bonding approach from appearance or assuming one protocol fits both.
Mistake to avoid: Selecting an adhesive or conventional cement purely because the restoration is tooth-coloured, rather than assessing the material properties and the clinical scenario.
Reference: [8]
30. Recognise thermal compatibility in metal-ceramic systems
A metal-ceramic system performs as a system, not as separate materials: the alloy's coefficient of thermal expansion should be close to, or slightly higher than, that of the veneering ceramic. Strength alone does not establish compatibility, and no universal numerical tolerance is set here, so proposed combinations are checked against manufacturer and applicable material-system requirements before acceptance.
Worked example: A laboratory proposes a strong base-metal alloy under a ceramic veneer for a molar crown; before accepting the pairing, the thermal-expansion match between alloy and ceramic is reviewed against the manufacturer requirements, since high strength by itself does not confirm the system will perform.
Mistake to avoid: Accepting an alloy-ceramic pairing because each material is individually strong, without checking that their thermal expansion coefficients are compatible.
Reference: [8]
31. Consider the constituents of an alloy in allergy assessment
Corrosion can release an alloy's constituent metals, and these ions have been associated with irritation or allergic responses. A noble-metal label does not exclude reactions, because noble metals may cause adverse responses when alloyed with base metals such as nickel, a common contact allergen. Reported symptoms warrant assessment but do not by themselves prove the restoration caused an allergy.
Worked example: A patient mentions a previous skin reaction to nickel earrings before a crown is planned; the proposed alloy's full composition is reviewed rather than trusting its noble-metal description, and any later oral symptoms are assessed clinically instead of being assumed to confirm a material allergy.
Mistake to avoid: Treating a noble-metal category label as proof that an alloy contains no allergens, ignoring base metals such as nickel within it.
Reference: [8]
The developing dentition
32. Build an orthodontic diagnostic summary before sequencing care
Orthodontic evaluation covers three areas: health of the teeth and oral structures, occlusal relationships and alignment, and facial and jaw proportions. A diagnostic summary establishes the relative contributions of soft-tissue, dental and skeletal structures to the malocclusion, prioritises problems and supports sequencing. Records are chosen through prudent clinical judgement, so not every possible record is needed for every patient.
Worked example: A child presents with crowded lower incisors and a noticeable chin deviation; the diagnostic summary weighs dental alignment together with possible skeletal and soft-tissue contributions, and only the records judged necessary for this presentation are taken before treatment priorities and sequencing are planned.
Mistake to avoid: Planning treatment from the visible crowding alone, overlooking skeletal or soft-tissue contributions and skipping the structured diagnostic summary.
Reference: [6]
33. Calculate an arch-space shortfall explicitly
Tooth-size/arch-length discrepancy compares the space required to align the teeth with the space available in each arch. Stating the subtraction convention explicitly, such as required minus available, yields a numerical shortfall that identifies crowding, but the figure alone does not determine extraction or appliance treatment; comprehensive diagnosis remains necessary.
Worked example: A mixed-dentition patient's lower arch analysis shows 76 mm required and 71 mm available. Stating required minus available gives a 5 mm shortfall, which documents crowding severity for the record while comprehensive diagnosis continues before any treatment decision.
Mistake to avoid: Converting the calculated shortfall figure directly into an extraction prescription without completing a comprehensive orthodontic diagnosis first.
Reference: [6]
34. Distinguish ankylosis from apparent submergence
Ankylosis involves direct fusion of root cementum to surrounding bone, with the periodontal ligament replaced by osseous tissue, so the tooth stays at one vertical level. In a growing child it can appear to submerge as adjacent teeth continue erupting; infraocclusion is a sign requiring clinical and radiographic confirmation, not a diagnosis from appearance alone.
Worked example: A child's primary second molar sits below the occlusal plane of its neighbours and gives a dull percussion note with no physiologic mobility. Clinical and radiographic assessment for ankylosis follows, rather than assuming the molar has actively moved downwards within the jaw.
Mistake to avoid: Describing the apparent submergence as proof that the tooth has actively moved downwards within the jaw.
Reference: [6]
35. Recognise why primary failure of eruption changes treatment
Primary failure of eruption typically involves partial or complete non-eruption of permanent teeth without mechanical obstruction or a syndrome, although primary-dentition examples have been noted. Diagnosis combines clinical, radiographic and genetic information. Affected teeth are not initially ankylosed but may become ankylosed under orthodontic force, so early orthodontic intervention on them should be avoided.
Worked example: A paper case describes a child with several posterior teeth failing to erupt, no evident obstruction, and an affected relative. Assessment for primary failure of eruption, including family history, precedes any proposed orthodontically assisted eruption of these teeth.
Mistake to avoid: Treating every unerupted tooth as mechanically obstructed and applying orthodontic traction regardless of the eruption diagnosis.
Reference: [6]
Endodontic decisions after dental trauma
36. Recognise the added risk of combined injuries
When a permanent-tooth crown fracture, with or without pulp exposure, occurs together with a luxation injury, pulp necrosis and infection occur more frequently and prognosis is worse. For combined injuries, the more frequent luxation follow-up regimen takes precedence over the less frequent fracture regimen; exact schedules come from the relevant injury tables.
Worked example: A permanent incisor sustains an enamel-dentine crown fracture without pulp exposure together with extrusive luxation. Because the injuries are combined, follow-up is scheduled using the luxation regimen, which is more frequent, rather than the less frequent fracture regimen alone.
Mistake to avoid: Planning review solely around the more visible crown fracture and neglecting the luxation follow-up schedule.
Reference: [16]
37. Preserve healing potential in immature injured teeth
Fractured or luxated immature permanent teeth may retain or recover pulp vitality, so root canal treatment is generally avoided unless clinical or radiographic evidence of necrosis or periapical infection appears on follow-up. Because infection-related resorption can progress rapidly in children, close follow-up is mandatory. An exception is the intruded immature tooth with a concurrent crown fracture, where immediate or early treatment may be considered.
Worked example: A paper case describes a nine-year-old whose immature maxillary incisor suffered extrusion without crown fracture. Combined clinical and radiographic assessment, including pulp sensibility testing, finds no evidence of necrosis or periapical infection, so the plan records close scheduled reviews rather than automatic root canal treatment.
Mistake to avoid: Starting root canal treatment on every immature luxated tooth while omitting the close follow-up schedule that detects rapid infection-related resorption.
Reference: [16]
38. Interpret pulp canal obliteration cautiously
Pulp canal obliteration after trauma usually reflects viable tissue within the canal, particularly in teeth with open apices after severe luxation. Usually does not mean invariably, so interpretation requires symptoms, clinical examination, radiographs and appropriate pulp assessment rather than narrowing alone. This finding does not establish a universal rule for when endodontic treatment should begin after every traumatic injury.
Worked example: A paper case follows a teenager whose previously intruded tooth shows canal narrowing at review. The tooth is asymptomatic with present sensibility responses, so the clinician documents probable pulp canal obliteration and continues radiographic monitoring, planning reassessment if symptoms or necrosis evidence appear.
Mistake to avoid: Treating radiographic canal narrowing after trauma as definite pulp necrosis and commencing endodontic treatment without symptoms, clinical findings, or follow-up evidence.
Reference: [16]
39. Maintain dental-dam isolation during trauma-related endodontics
Endodontic treatment for traumatised teeth should be undertaken under dental-dam isolation. When the injured tooth is difficult to clamp, the retainer may be positioned on one or more neighbouring teeth to avoid further trauma and reduce the risk of fracturing an immature tooth. Isolation and retainer selection require appropriate clinical competence and assessment of the injured tooth.
Worked example: A paper case describes endodontic access on an immature luxated incisor with a fragile crown. The dental dam is applied with the retainer seated on an adjacent tooth, and floss stabilisation is considered, maintaining isolation throughout while avoiding clamping pressure on the weakened injured tooth.
Mistake to avoid: Skipping dental-dam isolation because the injured tooth is hard to clamp, instead of placing the retainer on neighbouring teeth.
Reference: [16]
40. Match trauma splinting to the injury
Current evidence supports short-term, passive, flexible splints for luxated, avulsed and root-fractured teeth, but splinting duration depends on the injury type. In alveolar bone fractures, splinting may serve to immobilise the bone segment. This general principle does not by itself establish an avulsion-management protocol; injury-specific guidance determines construction and duration.
Worked example: A paper case records a thirteen-year-old who sustained an alveolar bone fracture with several displaced teeth; the splint plan targets immobilisation of the bone segment with an injury-specific duration, rather than applying one fixed splinting period to every traumatic injury.
Mistake to avoid: Assigning one splint duration to all traumatic injuries instead of matching splint type and duration to the specific injury.
Reference: [16]
Infection decisions and conscious sedation
41. Use antibiotics as an adjunct when clinically indicated
Local measures such as drainage via extraction or root canal come first for dental bacterial infection. Antibiotics are considered only when local treatment has failed, or when cellulitis, spreading or systemic infection, or high complication risk such as immunosuppression or uncontrolled diabetes is present. They must accompany, never replace, definitive local care, and prescribing follows applicable local requirements.
Worked example: A fit adult presents with a periapical abscess, localized swelling, and mild pain. The dentist arranges drainage through root canal access or extraction, records the diagnosis, and gives safety-netting advice, withholding antibiotics because no spreading, systemic, or complication-risk factors exist.
Mistake to avoid: Issuing an antibiotic prescription instead of draining the abscess or extracting the tooth, treating the drug as the definitive source control.
Reference: [9]
42. Escalate severe infection red flags immediately
Significant trismus, floor-of-mouth swelling, breathing or swallowing difficulty, rapidly spreading cellulitis, or deep-space involvement signals severe infection needing emergency hospital transfer. Airway compromise, for example in Ludwig's angina or sepsis, requires calling the local emergency number for an ambulance. Immunocompromised patients warrant a lower threshold for secondary-care discussion and transfer.
Worked example: During assessment, a patient with dental swelling reports worsening swallowing difficulty and limited mouth opening. The dentist records temperature, pulse, and blood pressure, documents the findings, and arranges immediate emergency hospital transfer rather than prescribing oral antibiotics for a trial period.
Mistake to avoid: Delaying hospital transfer to see whether an outpatient antibiotic course controls the swelling and trismus first.
Reference: [9]
43. Separate inflammatory pain from an antibiotic indication
Irreversible pulpitis and dry socket cause pain primarily through an inflammatory response, so the guidance recommends that antibiotics should not be prescribed to manage that pain. Management involves identifying the condition, using appropriate local measures and analgesics, and assessing whether any separate infection indication exists independently.
Worked example: A patient attends with severe throbbing pain after an extraction. Assessment finds a dry socket with no fever, spreading swelling, or systemic signs, and no separate antibiotic indication. The plan records appropriate local measures and analgesic assessment rather than prescribing antibiotics for the pain.
Mistake to avoid: Prescribing antibiotics because pulpitis pain is intense, mistaking pain severity for evidence of spreading bacterial infection.
Reference: [9]
44. Review antibiotic response and provide safety netting
When antibiotics are prescribed, record the diagnosis and give safety-netting advice to contact the practice if symptoms worsen, fail to improve, or new symptoms appear. Review ideally at three days, earlier for particularly unwell patients, preferably in person for severe infection. If systemic signs have resolved, stopping the antibiotic can be advised following that review.
Worked example: A patient started on antibiotics for cellulitis is reviewed by phone at three days. Fever and malaise have settled and swelling is improving, so the clinician advises stopping the remaining course, while repeating safety-netting advice to make contact if symptoms return or worsen.
Mistake to avoid: Telling a patient whose swallowing is deteriorating to wait until the scheduled three-day review before being reassessed.
Reference: [9]
45. Define conscious sedation by preserved responsiveness
Conscious sedation is defined by what is preserved during the technique: the patient keeps verbal contact with the team and retains protective reflexes. A wide margin of safety must separate this state from the unconsciousness produced by general anaesthesia, whatever drug or route is chosen. Anxiety management should also weigh individualised non-pharmacological behavioural methods, alone or alongside sedation.
Worked example: A colleague proposes a sedation plan in which the patient will not respond to voice during restorative care. The plan is reassessed because loss of verbal responsiveness falls outside the conscious-sedation definition, and the intended technique and appropriate safeguards are reviewed before care proceeds.
Mistake to avoid: Identifying conscious sedation by the agent or route used instead of by preserved responsiveness and the required safety margin.
Reference: [11]
46. Separate operating duties from continuous sedation assistance
When an operator-sedationist delivers conscious sedation, a second sedation-trained person, such as a dental sedation nurse, must be present throughout, able to monitor the patient according to the technique and to assist if a complication arises. No staff member should ever be left alone with a sedated patient, so other duties are assigned elsewhere.
Worked example: During intravenous sedation the trained sedation nurse is called away to cover reception. Treatment pauses while a receptionist handles calls, because the assistant must stay continuously with the sedated patient to monitor and help manage any complication until discharge.
Mistake to avoid: Counting an untrained or intermittently present colleague as adequate sedation assistance while the operator-sedationist works.
Reference: [11]
47. Refer sedation needs beyond the team's competence
Referral for sedation follows a thorough clinical assessment and discussion with the patient of alternative pain and anxiety management options, judging whether referral is genuinely necessary. Practitioners must recognise the limits of their own competency and refer to teams with the required skills. A dedicated sedationist may benefit patients who are medically compromised, physically disabled or emotionally challenging, judged case by case.
Worked example: A wheelchair-using patient with mild dental anxiety is assessed and manages treatment with behavioural techniques in the practice. Another patient whose cardiac history exceeds the team's experience is referred with full clinical information and an explanation of likely options.
Mistake to avoid: Choosing sedation or a dedicated sedationist solely from a disability label without individual clinical assessment.
Reference: [11]
Adult basic life support
48. Call for an unresponsive adult before completing breathing assessment
Under the 2025 Resuscitation Council UK adult guidance, rescuers should call 999 without delay for any unresponsive person and assess breathing while the call connects, with the call handler assisting if uncertain. Unresponsiveness combined with abnormal breathing, including gasping, slow laboured breathing or panting, means cardiac arrest is presumed and CPR should begin.
Worked example: An adult patient collapses in the waiting room and is unresponsive with occasional gasping breaths. A team member dials 999 on speaker and assesses breathing while the call connects; the gasps are treated as abnormal breathing and the cardiac-arrest response begins.
Mistake to avoid: Delaying the emergency call to confirm abnormal breathing first, or treating agonal gasps as normal breathing.
Reference: [10]
49. Recognise the components of high-quality adult CPR
High-quality adult CPR uses compressions at 100-120 per minute, at least 5 cm but no more than 6 cm deep, with complete chest recoil and minimal interruptions. Rescuers trained in rescue breaths alternate 30 compressions with two breaths, giving only enough air to make the chest start to rise. Untrained rescuers give continuous compressions. These adult figures do not transfer automatically to children without training.
Worked example: A dental nurse finds an adult slumped in the waiting room, gets no response and observes abnormal breathing, so assumes cardiac arrest. Having summoned help, she starts compressions at about 110 per minute, 5.5 cm deep, with full recoil, completing two 30:2 cycles.
Mistake to avoid: Keeping the rate correct but leaning on the chest between compressions, which prevents the complete recoil the guidelines require.
Reference: [10]
50. Resume compressions after either AED decision
An AED should be used as soon as one is available, following its audio and visual prompts throughout. Nobody should touch the patient during rhythm analysis or shock delivery. Compressions restart immediately after a shock and equally after a no-shock decision, then continue following the prompts. Where more than one rescuer is present, CPR can continue while the pads are being attached.
Worked example: During rhythm analysis the team steps back as instructed by the AED. The device announces that no shock is advised, so the team immediately resumes compressions and continues following the voice prompts until the next analysis pause.
Mistake to avoid: Stopping CPR because the AED advised no shock, mistaking that message for a decision to discontinue resuscitation efforts entirely.
Reference: [10]
Infection prevention and instrument processing
51. Add transmission-based precautions when standard precautions are insufficient
Dental saliva is treated as potentially infectious, so standard precautions apply to every patient regardless of visible blood. Some infections spread by airborne, droplet or contact routes additionally require transmission-based precautions, which may include patient placement, ventilation, respiratory protection or postponement of non-emergency dental care. The CDC 2003 text provides foundations; current pathogen-specific and local guidance determines practical precautions.
Worked example: A patient telephones with fever, cough and confirmed influenza during a local outbreak. The practice defers a routine scale and polish, because standard precautions alone do not establish that elective treatment can proceed safely under droplet precautions.
Mistake to avoid: Treating saliva as harmless because no visible blood is present, ignoring that standard precautions already classify it as infectious.
Reference: [14]
52. Classify instruments by intended tissue contact
Classified by intended tissue contact: critical items penetrate soft tissue or bone and require heat sterilisation. Heat-tolerant semicritical items touching mucous membranes or non-intact skin also require heat sterilisation; heat-sensitive semicritical items need at least high-level disinfection. Noncritical items contact intact skin: cleaning is usually adequate, visibly soiled items need cleaning before disinfection, and visible blood or other potentially infectious material requires intermediate-level disinfection.
Worked example: A reusable bone chisel that penetrates soft tissue and bone during minor oral surgery is classified as critical and heat sterilised after every use, regardless of how clean it looks or whether contamination is visible.
Mistake to avoid: Selecting the processing method from how clean an instrument appears instead of from its intended tissue contact category.
Reference: [14]
53. Keep instrument processing in an ordered workflow
Instrument processing moves through four separate sections: receiving, cleaning and decontamination; preparation and packaging; sterilisation; and storage. Contaminated instruments are contained at the point of use for safe transport. The workflow depends on trained personnel, suitable facilities and validated device-specific processing instructions rather than a single step.
Worked example: After an extraction, the nurse places reusable forceps into a puncture-resistant transport container at the chairside for delivery to receiving and cleaning, while the used disposable needle goes straight into the nearby designated sharps-disposal container, so no sharp is carried loose through the corridor.
Mistake to avoid: Loading the steriliser and calling the instruments done, skipping cleaning, packaging and the earlier decontamination stages entirely.
Reference: [14]
54. Interpret sterilisation indicators without overstating them
Sterilisation monitoring combines mechanical, chemical and biological parameters. Correct mechanical readings or a changed chemical indicator alone do not confirm sterilisation. If mechanical or chemical results indicate inadequate processing, the load is withheld until reprocessed, with indicator selection and failure investigation following current local protocols and manufacturer instructions.
Worked example: A steam cycle prints normal parameters and the external tape changed, but an internal indicator inside a wrapped tray did not react, so under the practice protocol and manufacturer guidance the load is withheld and the failure investigated before reprocessing.
Mistake to avoid: Releasing instruments for patient use because the external indicator tape changed colour, ignoring internal and mechanical monitoring results.
Reference: [14]
55. Treat occupational exposure as requiring prompt evaluation
Qualifying exposures — percutaneous injury or contact with mucosa or non-intact skin — require prompt reporting and qualified evaluation even without visible blood. Potentially infectious material does not make every contact a qualifying exposure; routine protected contact or intact-skin contact does not require medical evaluation. Wash wounds with soap and water or flush mucosa; caustic agents and injected disinfectants are inappropriate, and prophylaxis follows current qualified assessment.
Worked example: During a restoration, a used bur punctures a gloved finger with no visible blood on it. The dentist washes the wound with soap and water, reports immediately to the designated coordinator, and attends the qualified occupational health assessment arranged under local protocol.
Mistake to avoid: Dismissing a sharps injury as harmless because no blood was visible on the instrument or the glove.
Reference: [14]
Consent, records and coordinated care
56. Treat informed consent as an ongoing choice
Under the Irish professional code, patients need sufficient information to make an informed treatment decision, and consent remains a continuing choice: a patient may refuse or withdraw consent at any point during treatment. A signed form records one stage of a discussion-based process, not a permanent permission, and current requirements vary by jurisdiction, patient and procedure.
Worked example: Midway through a planned crown preparation, a patient asks to stop and reconsider after hearing about a possible root canal risk. The dentist pauses, discusses the concerns and records the revised decision rather than continuing on the strength of the earlier signed form.
Mistake to avoid: Treating a signed consent form as irrevocable permission that overrides a patient changing their mind during treatment.
Reference: [15]
57. Support decisions without assuming global incapacity
The Irish code treats capacity as decision-specific and time-specific, so a patient may need extra help with one complex choice while managing simpler decisions independently. Dentists should support patients to decide for themselves wherever possible, assessing each decision on its own merits rather than labelling a patient globally incapable.
Worked example: An older patient with mild cognitive difficulty takes longer to understand an implant option but clearly chooses between two filling materials after a short explanation. The dentist supports each discussion separately and records how each decision was reached.
Mistake to avoid: Treating a relative accompanying an adult patient as having automatic authority to consent on the adult's behalf.
Reference: [15]
58. Respond openly to adverse events
When an adverse event occurs, the dentist's first duty is the patient's immediate safety and any further care the harm requires. The code requires telling the patient the nature and possible consequences at the time or as soon as possible afterwards, and recording the event and all related communications.
Worked example: During an extraction a bur slips and lacerates the patient's lip. The dentist controls bleeding, assesses whether suturing or review is needed, explains the injury and its possible consequences the same day, and documents the event, the discussion and the follow-up plan.
Mistake to avoid: Withholding an explanation of the event until the patient complains or asks what went wrong.
Reference: [15]
59. Make records contemporaneous and decision-supporting
Records must be legible, accurate, comprehensive and updated promptly after care while information is fresh. Detail should be sufficient to support the diagnosis, the treatment plan and the consent discussion, including significant communications such as advice, refusals of recommended treatment and any revisions to the plan or costs.
Worked example: A patient declines a recommended crown after the options and costs are discussed and chooses a large filling instead. The dentist writes the note that afternoon, recording the discussion, the patient's decision, the revised plan and the adjusted fee.
Mistake to avoid: Entering only the procedure code and material used while omitting the clinical reasoning behind the plan.
Reference: [15]
60. Keep referral care connected to primary care
Referral should be explained to the patient, including the reasons and the receiving dentist's skills, and communication between professionals forms part of the record. The treating dentist keeps the referrer informed and advises return to primary care, where overall oral-health supervision remains, and a referred child still receives continuing care.
Worked example: A child is referred for extraction of first permanent molars under general anaesthesia. The practice explains the reason to the family, continues prevention and recall meanwhile, sends relevant information with the referral, files the specialist's reply in the record and resumes full care afterwards.
Mistake to avoid: Assuming that a specialist referral transfers every aspect of the child's oral-health responsibility away from the practice.
References
- RCSI Diploma of Primary Care Dentistry Regulations
- RCSI Diploma of Primary Care Dentistry Examination
- RCSI DPCD, MFD and MGDS Syllabus and Guidance Notes
- SDCEP Prevention and Treatment of Periodontal Diseases in Primary Care
- SDCEP Prevention and Management of Dental Caries in Children, third edition
- AAPD Management of the Developing Dentition and Occlusion in Pediatric Dentistry, revised 2024
- American Dental Association
- American Dental Association
- SDCEP Drug Prescribing for Dentistry
- Resuscitation Council UK
- SDCEP Conscious Sedation in Dentistry, third edition
- American Dental Association
- American Dental Association
- CDC Guidelines for Infection Control in Dental Health-Care Settings, 2003
- Dental Council of Ireland
- IADT Guidelines for the Management of Traumatic Dental Injuries