These 60 selected concepts connect patient information with clinical decisions for RCS England’s current Licence in Dental Surgery Part 3. The examination combines decision-making with practical procedures in simulated clinical cases, at the standard expected of a safe Day One BDS-qualified dentist. Use the explanations, examples and mistakes alongside practical training and the official examination documents.
Patient assessment and professional foundations
1. Recheck medical history before continuing care
Medical history is an evolving clinical record rather than a one-time formality. At each subsequent visit, the clinician should ask about changes in health, medicines and relevant circumstances, then amend the record as necessary. The British Endodontic Society requires the history to be dated and signed by both patient and clinician, so relying on outdated details risks basing care decisions on stale information.
Worked example: A patient returns after six months for root canal treatment and mentions a new anticoagulant. The clinician records the change, dates the amended history, obtains both the patient's and the clinician's signatures, and reassesses whether the planned care remains appropriate before proceeding.
Mistake to avoid: Copying the original medical history onto the new record without asking the patient whether any health details or medicines have changed.
Supporting reference: [7]
2. Build a diagnosis from combined findings
Endodontic diagnosis is built by assimilating the patient's account, clinical examination findings and special tests, including pulp testing with control teeth and appropriate radiographs. The initial symptom description only begins the process, so the clinician should not prejudge the condition from it. The identified disease emerges from integrating all available findings rather than from any single symptom or test result.
Worked example: A patient firmly identifies a lower molar as the painful tooth. The clinician completes extra-oral and intra-oral examination, pulp tests the tooth and adjacent control teeth, and takes a periapical radiograph before confirming which tooth actually requires endodontic care.
Mistake to avoid: Planning root canal treatment solely from the patient's opening description of symptoms without completing examination, special tests and assimilation of all findings.
Supporting reference: [7]
3. Include deferral and no treatment among options
Before treatment starts, the clinician must explain all relevant options with the risks and benefits of each, including delaying treatment or doing nothing. Informed choice depends on comparing alternatives rather than hearing only the preferred intervention. The consequences and suitability of each option vary with the individual clinical situation, so the discussion must reflect that patient's circumstances.
Worked example: During a consultation about a cracked tooth, the clinician explains the risks and benefits of crowning, extraction, monitoring the tooth and leaving it untreated, describing what might happen under each option, and then invites the patient's questions before any decision.
Mistake to avoid: Omitting the consequences of declining or delaying treatment because the clinician presents only the operative option he or she prefers.
Supporting reference: [16]
4. Confirm consent throughout treatment
Valid consent must be obtained before treatment starts, with all relevant options and possible costs explained, and it must remain valid at each stage of investigation or treatment. Agreement recorded at an earlier appointment does not authorise every later stage, so the clinician should confirm at each stage that the patient still understands and accepts the proposed care.
Worked example: A patient consents to root canal treatment at the planning visit. Before beginning the next stage, the clinician checks that the patient understands what will happen, confirms the estimated cost, and asks whether she still agrees to continue.
Mistake to avoid: Treating the initial consent discussion as permanent authorisation for all later stages without confirming the patient's continuing agreement.
Supporting reference: [16]
5. Keep records attributable and amendments visible
Patient records must be contemporaneous, complete and accurate, and must identify the treating clinician by name or initials. When an entry needs correcting, the amendment must be clearly marked and dated so the change remains distinguishable from the original entry, whether records are paper or electronic.
Worked example: During a charting entry a student realises she has recorded the wrong tooth number. She adds a dated, signed addendum identifying the correct tooth, leaving the original entry intact and legible beneath it.
Mistake to avoid: Silently overwriting or deleting a clinical entry so that the amendment and its timing cannot be recognised.
Supporting reference: [16]
6. Explain information sharing and record permission
Before sharing information with others involved in a patient's care, explain what will be disclosed, why, and the likely consequences. Record in the notes whether permission was given or refused, and release information without permission only in exceptional circumstances, following an appropriate professional and legal assessment.
Worked example: Before referring a patient to a periodontal specialist, the dentist explains which radiographs and reports will be sent, why the disclosure is needed and its likely consequences, then records the patient's agreement in the notes.
Mistake to avoid: Assuming that a healthcare purpose automatically removes the need to explain the disclosure and record permission.
Supporting reference: [16]
7. Obtain permission for secondary image use
Using patient images or information for teaching or research is a separate purpose from treatment, so it requires its own explanation, confirmation that the patient understands, and recorded consent. Use only the minimum information necessary and explain that permission can be withdrawn at any time.
Worked example: A student asks to use a clinical photograph in a teaching presentation. After explaining the use and confirming understanding, she records consent, crops the image to show only the relevant lesion and notes that the patient may withdraw permission.
Mistake to avoid: Treating a patient's permission for one photograph as permission to publish their entire clinical history as well.
Supporting reference: [16]
A safe clinical environment
8. Safe reuse requires a decontamination process
Under HTM 01-05's 2013 edition for primary care dental practices in England, decontamination is the process by which reusable items are rendered safe for further use and for staff to handle. Local policies must give rise to the production and use of sterilized instruments for patients; visible cleanliness alone does not establish that condition, and current guidance and equipment instructions remain necessary.
Worked example: Extraction forceps look spotless after a procedure, but the dental nurse still processes them through the practice's validated cleaning and sterilization workflow before they are stored, because a clean appearance does not confirm an instrument is sterile.
Mistake to avoid: Equating the absence of visible debris on an instrument with proof that sterilization has been achieved.
Supporting reference: [15]
9. Assign decontamination work to trained operators
The person managing decontamination must ensure that roles and responsibilities are defined and understood, and that anyone operating or testing decontamination equipment is trained and competent for that specific equipment and task. Local job titles may differ between practices, but the practice must still demonstrate the required understanding, competence and management; a title alone does not establish competence to operate every machine.
Worked example: A dental nurse is asked to perform the weekly protein residue test on a washer-disinfector she has not used before. The User first confirms she has been trained and assessed as competent on that specific machine and test before delegating the duty to her.
Mistake to avoid: Assuming that a colleague's job title or mere presence in the decontamination area establishes competence to operate and test every machine.
Supporting reference: [15]
10. Distinguish visual checks from protein residue tests
Visual examination of all load items and the protein residue test assess different aspects of cleaning efficacy: appearance versus the process's retained capability to remove protein, so neither replaces the other. Where the cycle has no rinse stage, items should be rinsed as a normal procedure beforehand, otherwise the tests could return false positives; follow the manufacturer's schedule.
Worked example: A daily visual check shows every instrument visibly clean, but the weekly protein residue test is still due. The operator performs it, rinsing the items first because the machine's cycle has no rinse stage, as the manufacturer's instructions specify.
Mistake to avoid: Interpreting a protein residue test result without applying the specified rinsing requirement for a cycle that lacks a rinse stage.
Supporting reference: [15]
11. Cycle completion is only one acceptance condition
A satisfactory automatic control test requires a completion indication, cycle parameters within limits established by the manufacturer or validation, disinfection, cleaning or sterilizing temperatures within the appropriate band, hold times not less than previously established, a door that cannot be opened until the cycle is complete, and no observed mechanical or other anomaly. The completion message alone is insufficient; door checks require fully trained personnel.
Worked example: A sterilizer displays 'cycle complete', but the recorded sterilizing temperature sits outside the band established at validation. The operator records the automatic control test as unsatisfactory and seeks advice, rather than accepting the completion message alone as proof of a satisfactory cycle.
Mistake to avoid: Approving an automatic control test on the completion display alone without reviewing recorded parameters, hold temperatures, hold times or observed anomalies.
Supporting reference: [15]
Minimal intervention and direct restorations
12. Distinguish selective from non-selective removal
Selective carious tissue removal ends when soft or firm dentine is reached, whereas non-selective removal continues until hard dentine. For moderate and advanced lesions on vital, non-endodontically treated permanent teeth requiring restoration without pulp therapy, the ADA conditionally suggests prioritizing selective removal, although the supporting evidence certainty is very low.
Worked example: For a vital permanent molar with an advanced lesion requiring a restoration and no pulp therapy, the clinician explains that selective removal stopping at firm dentine is conditionally prioritized over non-selective removal to hard dentine, noting the very low certainty evidence.
Mistake to avoid: Describing residual soft or firm dentine left by deliberate selective removal as evidence that the procedure was accidentally incomplete.
Supporting reference: [5]
13. Use different peripheral and pulpal endpoints
In SDCEP's child-caries guidance, selective removal sets different endpoints by region. Peripheral walls are cleared to hard, scratchy dentine so the bonded adhesive can seal effectively, while the pulpal endpoint varies with lesion depth: shallow to moderately deep lesions reach leathery or firm dentine, whereas deep lesions may retain some soft dentine if enough restorative thickness remains and exposure is avoided.
Worked example: A child's permanent molar with a deep proximal lesion is prepared so the axial and peripheral walls feel scratchy, while a small amount of soft dentine is deliberately left on the pulpal floor because sufficient composite thickness remains and exposure would be likely.
Mistake to avoid: Applying the peripheral hard-dentine endpoint to a deep pulpal floor, over-excavating towards the pulp when soft dentine could have been retained safely.
Supporting reference: [6]
14. Do not equate dentine colour with removal need
Within SDCEP's child-caries selective-removal technique, dentine hardness rather than colour determines whether excavation continues. Stained dentine that still feels scratchy when probed may be left in place, because discolouration alone does not indicate caries requiring removal. The only stated exception concerns anterior restorations, where retained staining may cause an aesthetic problem for the child patient.
Worked example: During an indicated occlusal preparation in a child's primary molar, the pulpal floor shows dark staining but resists a hand excavator, so the operator stops excavating and restores rather than removing tissue purely to achieve a uniform colour.
Mistake to avoid: Continuing to excavate dark dentine that feels hard and scratchy, removing sound tissue unnecessarily and increasing the risk of pulpal exposure.
Supporting reference: [6]
15. Residual caries control depends on a marginal seal
Within SDCEP's child-caries selective-removal technique, residual caries is controlled through restoration rather than complete excavation. Leaving carious dentine pulpally works only when a bonded adhesive achieves an effective marginal seal, which inhibits lesion progression while minimising iatrogenic pulpal damage. Good cavity preparation, including removal of unsupported or undermined enamel, remains essential, with appropriate monitoring afterwards.
Worked example: For a child's permanent molar with an extensive proximal lesion, soft dentine remains on the pulpal floor, but the dentist removes a fringe of undermined enamel at the margin before bonding the restoration and plans radiographic monitoring.
Mistake to avoid: Assuming retained carious dentine will arrest despite a leaky or defective peripheral seal, treating selective removal as permission to accept poor restoration quality.
Supporting reference: [6]
16. Protect adjacent teeth during proximal preparation
Within SDCEP's child-caries guidance, cutting a multi-surface cavity risks iatrogenic damage to the adjacent tooth from the bur. The guidance suggests that placing a matrix band around the neighbouring tooth may help protect its surface. Such protection aids, but does not replace, careful controlled instrumentation and appropriately supervised development of operative competence.
Worked example: Before preparing an indicated mesio-occlusal cavity in a child's primary molar, the operator considers winding a matrix band around the mesial neighbouring tooth, whose proximal surface faces the bur during cutting, as an additional safeguard.
Mistake to avoid: Protecting only the distal neighbour when the proximal preparation is mesial, leaving the surface actually threatened by the bur unprotected.
Supporting reference: [6]
17. Let isolation constraints inform material selection
For moderate or advanced lesions on vital, non-endodontically treated permanent teeth without pulp therapy, the ADA offers conditional, very-low-certainty guidance. Conventional and resin-modified glass ionomer may be preferable when isolation cannot be achieved, and conventional GIC when light-curing is not feasible. For Class V cervical restorations, conventional GIC, hybrid resin composite, or resin-modified GIC are suggested, so isolation and curing feasibility can inform selection.
Worked example: A student restores a moderate cervical lesion on a vital permanent premolar where rubber dam isolation cannot be achieved and light-curing is unavailable; conventional glass ionomer is considered among the indicated options rather than a composite that would require curing.
Mistake to avoid: Applying the isolation-based GIC preference to a posterior Class II cavity where the guidance prioritises other materials over conventional GIC.
Supporting reference: [5]
18. Respect the multi-surface conventional GIC restriction
Within SDCEP's selective caries removal technique for managing caries in children, the restoration is placed using an adhesive material and a bonding system, and conventional glass ionomer materials must not be used for multi-surface cavities. Conventional and resin-modified glass ionomer are distinct formulations, so the restriction applies to conventional GIC specifically and should not be read as covering every adhesive material or cavity type.
Worked example: Following selective caries removal in a child's primary molar with a mesio-occlusal cavity, the operator places a resin composite with a bonding system, because conventional glass ionomer is excluded from multi-surface cavities under this technique.
Mistake to avoid: Using conventional glass ionomer for a two-surface cavity under this technique, confusing it with resin-modified GIC or single-surface indications.
Supporting reference: [6]
Indirect restorations and provisional care
19. Assess crown reduction against material specifications
A vinyl polysiloxane putty reduction guide, used with instruments, supports assessment of crown preparation in the referenced simulation exercise. Its specific measurements originated from manufacturer guidelines for lithium disilicate, so the target reduction values must match the selected restorative material. No universal reduction dimensions or margin geometry follow from this educational exercise, and programs adapting the assessment form should adjust measurements accordingly.
Worked example: Before assessing a simulated molar preparation, a student confirms the target occlusal and axial reductions against the manufacturer's guidance for the chosen lithium disilicate crown, then checks them using the putty reduction guide and measuring instruments.
Mistake to avoid: Copying reduction dimensions from a lithium disilicate exercise when preparing a tooth for a different crown material.
Supporting reference: [8]
20. Evaluate provisional restorations beyond appearance
Established provisional-restoration principles require more than an acceptable appearance: pulpal protection, positional stability, occlusal function, ability to be cleansed, margin accuracy, wear resistance, strength, and esthetics must all be satisfied. A provisional also serves as a template for the final restoration, so deficiencies such as an inaccurate margin or a surface that cannot be cleaned require correction before the restoration is considered acceptable.
Worked example: A provisional crown appears esthetic and stable, but exploration reveals an open margin and a rough surface that the patient cannot clean; the provisional is adjusted and remade until margin accuracy and cleanability are achieved before proceeding.
Mistake to avoid: Accepting a provisional restoration because its shade and contour look good while ignoring margin accuracy and cleanability.
Supporting reference: [9]
21. Distinguish direct, indirect and combined fabrication
Provisional restorations may be made directly on the prepared teeth, using a matrix, or indirectly by fabricating the interim restoration outside the mouth, which can be partly delegated to auxiliary personnel. The combined indirect-direct technique is a sequential application of both: a preformed shell is fabricated externally and then relined intraorally.
Worked example: A candidate prepares two abutments for a three-unit fixed prosthesis. Having fabricated a shell on a preliminary cast before the appointment, he seats it and relines its fitting surface chairside; classifying the whole procedure as direct would be wrong.
Mistake to avoid: Describing a relined preformed shell as purely indirect, which ignores the intraoral relining stage that defines the combined indirect-direct technique.
Supporting reference: [9]
22. Consider polymerization exposure when choosing a technique
For the acrylic resin techniques described, indirect fabrication means no free monomer contacts the prepared teeth or gingiva and the tooth is not exposed to polymerization heat. Combined fabrication leaves less resin polymerizing against the abutment than the direct technique, reducing heat, chemical exposure and shrinkage. These comparisons apply to those systems, not to every modern provisional material.
Worked example: Choosing between a feasible direct and an indirect method for an acrylic provisional, a student weighs the reduced monomer and heat exposure of the indirect route against the case's clinical demands rather than picking whichever seems quicker that day.
Mistake to avoid: Assuming every provisional material releases monomer and heat like acrylic resin, or selecting a technique on convenience alone.
Supporting reference: [9]
23. Use an evaluated provisional to inform the final restoration
A provisional restoration serves as a template for the definitive restoration, but only after its form, function and contours have been evaluated intraorally. The clinician should assess the provisional's performance, adjust or refine it as needed, and let the evaluated result guide the final restoration rather than copying an untested design unchanged.
Worked example: After a week of wearing a provisional bridge, a student records that the patient reports food trapping between the pontic and the ridge, reshapes the pontic's tissue surface, and conveys the accepted contour to the technician for the definitive prosthesis.
Mistake to avoid: Reproducing the first provisional's design in the final restoration without first checking whether it met its clinical requirements.
Supporting reference: [9]
Endodontic assessment, referral and records
24. Record control-tooth responses with pulp tests
Endodontic examination records should document pulp test responses of control teeth alongside those of the suspect tooth. This comparison is part of assimilating history, examination and special test findings when determining the patient's disease or problem; a single test result supports interpretation but does not by itself constitute a diagnosis.
Worked example: When an upper molar gives no response to cold testing, the notes record that adjacent and contralateral control teeth responded normally to the same stimulus, so the absent response can be interpreted against a documented baseline rather than in isolation.
Mistake to avoid: Writing only that pulp testing was performed while omitting the recorded responses of the control teeth.
Supporting reference: [7]
25. Record imaging justification and interpretation
Endodontic documentation must state why an image was justified and record a written report of its findings. Saving the radiograph in the notes shows only that the image exists; it does not communicate the clinical reason for the investigation or the interpreted result. Recording both elements makes the record complete, supports continuity of care, and allows another clinician to understand the decision-making.
Worked example: A dentist records that a long-cone periapical radiograph of the upper left first molar was taken to investigate suspected apical pathology, then writes in the notes that a periapical radiolucency was present at the distobuccal root.
Mistake to avoid: Filing the periapical image in the record while leaving its clinical justification and interpreted findings unreported.
Supporting reference: [7]
26. Match endodontic difficulty to operator capability
Root canal treatment should proceed only when the case's technical and knowledge demands sit within the operator's demonstrated competence. Difficulty assessment tools can help gauge complexity and suggest a suitable delivery pathway, but they support decision-making rather than certify ability. When a case exceeds the operator's capability, referral is the appropriate course so the patient receives suitably skilled care.
Worked example: A general dental practitioner assessing a tooth with a recurved S-shaped canal judges the negotiation beyond their current capability and refers the patient to a specialist endodontist, documenting the difficulty assessment that informed the referral decision.
Mistake to avoid: Treating every canal configuration as manageable because prior experience with simpler molar cases created unfounded confidence in complex anatomy.
Supporting reference: [7]
27. Make an endodontic referral clinically informative
A referral letter should give the receiving clinician a full picture: the patient's complaint and history, relevant medical, dental and social histories, examination and special test findings, restorability assessment where possible, diagnostic radiographs, a diagnosis, the difficulty-based justification for referral, and details of any failed treatment attempts. Confidentiality and appropriate permissions apply when sharing this information.
Worked example: A practitioner refers a maxillary molar with a separated instrument, enclosing the complaint history, pulp test results, a diagnostic periapical radiograph, a diagnosis of symptomatic apical periodontitis, the difficulty score, and the instrument's type and estimated location.
Mistake to avoid: Sending a referral that names only the tooth while omitting the failed treatment details the specialist needs.
28. Pair working lengths with their reference points
Endodontic records should link each canal label and working length to the reference point from which it was measured, alongside the final apical preparation size and taper. A length recorded in isolation is incomplete because the starting point cannot be verified. These entries document patient-specific findings rather than prescribing recommended lengths or preparation targets for other cases.
Worked example: A clinician records the mesiobuccal canal of the lower left first molar at 19.0 mm measured from the mesiobuccal cusp tip, and notes the final apical preparation as size 30, 0.06 taper.
Mistake to avoid: Writing only a millimetre figure so that neither the canal treated nor the measurement reference can be identified.
Supporting reference: [7]
29. Document the actual endodontic agents and sequence
An endodontic operative record should name the anaesthetic agent, dose and technique, confirm rubber dam isolation, record disinfectants with their concentrations, describe the preparation protocol and instrumentation sequence, and list the materials actually used, including any intracanal dressing, obturation material, sealer and temporary restoration. A generic procedure label such as root canal treatment cannot replace these treatment details.
Worked example: A clinician records sodium hypochlorite irrigation and gutta-percha obturation but omits the irrigant concentration, the instrumentation sequence and the sealer used; the record identifies some required entries yet leaves others incomplete, so the documentation standard remains unmet.
Mistake to avoid: Writing 'root canal treatment completed' as the entire operative record instead of documenting the agents, concentrations, sequence and materials used.
Supporting reference: [7]
Removable partial denture support and stability
30. Distinguish support from stability
Support is provided by the foundation of teeth and soft tissue on which the prosthesis rests. Stability describes resistance to displacement under functional, horizontal and rotational stresses and, for a distal extension removable partial denture, depends greatly on the quality of fit to the supporting teeth and tissues. Identifying the supporting structures therefore does not by itself establish stability.
Worked example: A student lists the abutment teeth and residual ridge beneath a newly fabricated distal extension denture and calls the prosthesis stable. Naming that foundation describes support only; stability must be assessed by observing displacement when functional, horizontal and rotational loads are applied.
Mistake to avoid: Calling a removable partial denture stable merely because it rests on an identified foundation of teeth and soft tissue.
Supporting reference: [10]
31. Interpret lifting of the indirect retainer
In the described assessment of a newly fabricated distal extension removable partial denture, finger pressure applied to the distal-most tooth on the denture base that lifts the anterior-most indirect retainer indicates the prosthesis is not vertically stable. This interpretation belongs to that distal extension design and clinician assessment; it is not a universal test for every prosthesis.
Worked example: During delivery of a distal extension removable partial denture, finger pressure on the distal-most base area lifts the anterior indirect retainer. The clinician records vertical instability, discusses the finding with the patient and arranges further assessment such as evaluating the need for a reline.
Mistake to avoid: Accepting a satisfactory unloaded appearance of the denture as evidence of stability during function without applying the described distal pressure test.
Supporting reference: [10]
32. Interpret adaptation material with rests fully seated
When assessing distal extension base adaptation, a small amount of polyvinyl siloxane impression material is applied to the tissue side of the denture base without adhesive, and the framework rests are held fully seated while it sets. After removal, thicker areas of material indicate a larger space between the resin base and the underlying soft tissues.
Worked example: A clinician seats a distal extension framework, holds the rests fully seated while polyvinyl siloxane sets without adhesive, then finds one localized thick layer beneath the base. Because seating was verified, that layer indicates an adaptation gap at that site requiring clinical judgement.
Mistake to avoid: Interpreting the material layer as a tissue-fit measurement when the framework rests were not held in a fully seated position.
Supporting reference: [10]
33. Recognise the mechanical effect of distal loading
When occlusal loads rotate a distal extension base, a fulcrum can form at the terminal abutments, concentrating pressure at the distal-most support area and imposing non-axial forces that may harm a weak abutment. The effect depends on framework design, clasp rigidity and the supporting tissues, and good tissue adaptation becomes increasingly important the farther loading occurs from the terminal abutment.
Worked example: A patient with a rotated distal extension base and a periodontally weakened terminal premolar is assessed; the clinician weighs improved base adaptation against the non-axial forces the rotation may transfer to that abutment before planning any adjustment.
Mistake to avoid: Dismissing base rotation as merely a comfort complaint while overlooking its mechanical consequences for the abutment and ridge.
Supporting reference: [10]
34. Preserve seating and reassess after relining
When relining a distal extension RPD, the dentist should hold the framework fully seated until the reline material begins to set. For the direct reline materials described in the article, final polymerization is recommended outside the mouth following each product's specific manufacturer instructions. After either direct or indirect relining, occlusion should be re-evaluated and borders checked for over-extension.
Worked example: During a chairside hard reline of a distal extension base, the dentist keeps the rests seated until the material begins to set, completes polymerization outside the mouth as that product's instructions specify, then rechecks occlusion and border extension before dismissing the patient.
Mistake to avoid: Concluding that improved tissue adaptation alone proves occlusion and border extension remain satisfactory without further assessment.
Supporting reference: [10]
Non-surgical periodontal instrumentation
35. Choose effective hand or powered instrumentation
For patients diagnosed with periodontitis, hand instruments, powered instruments or a combination can achieve effective subgingival professional mechanical plaque removal, provided each method is performed effectively; evidence shows no difference in debridement quality between approaches. Instrument choice should reflect clinician and patient preferences, the clinical situation and the goal of treatment.
Worked example: A hygienist treating a patient who dislikes the vibration of powered scalers plans thorough subgingival debridement using hand curettes alone, allowing extra appointment time, because effective hand instrumentation achieves debridement quality comparable to powered methods in this situation.
Mistake to avoid: Assuming a powered scaler automatically gives better debridement than hand instruments regardless of how effectively it is used.
Supporting reference: [11]
36. Match the instrument to anatomy and access
Effective instrumentation requires a thorough understanding of tooth and root anatomy, knowledge of how each instrument works and awareness of which instrument suits a particular area. Site-specific instruments should be selected where required rather than assuming a single familiar instrument can adequately treat every root surface or anatomical challenge.
Worked example: When debriding a mesial furcation entrance on an upper molar with limited access, the clinician selects a site-specific curette designed for that root morphology instead of persisting with a general-purpose instrument that cannot adapt to the area.
Mistake to avoid: Continuing with a familiar instrument even though it is unsuitable for the root surface being treated.
Supporting reference: [11]
37. Air polishing does not remove calculus
Air polishing devices can remove soft plaque biofilm, with evidence drawn largely from supportive care, but they do not remove calculus. When calculus is present, hand or powered instruments are also needed for thorough debridement. Around implant-supported restorations, air polishing is reported as safe in healthy patients, though care is advised when inflammation is present.
Worked example: During a maintenance visit for a patient with periodontitis, a student clinician uses air polishing to disrupt supragingival biofilm around an implant crown, then, because calculus remains on the adjacent root surface, completes debridement with an ultrasonic tip under supervision.
Mistake to avoid: Assuming that successful removal of soft plaque biofilm with an air polisher also establishes removal of hardened calculus deposits.
Supporting reference: [11]
38. Use the sides of powered working tips
For subgingival debridement with sonic or ultrasonic instruments, the sides of the working tip, not the pointed end, should contact the root surface. Appropriate tip selection and use should follow the manufacturer's instructions and supervised clinical training; no specific power setting is prescribed here.
Worked example: While practising root-surface debridement on a simulation model, a student who is contacting the root end-on with an ultrasonic tip is corrected to adapt the lateral side of the working tip instead.
Mistake to avoid: Directing the pointed end of a sonic or ultrasonic tip against the root surface as though it were the recommended working contact.
Supporting reference: [11]
39. Plan complete coverage and sufficient instrumentation time
Overlapping strokes help ensure that all of the affected root surface is instrumented. The time needed varies with the level of deposits, tooth type, pocket depth, furcation involvement, challenging anatomy and location, so no universal treatment duration or stroke count applies.
Worked example: A molar furcation associated with a deep defect is allotted more instrumentation time than an uncomplicated single-rooted site in the same mouth, because access is more difficult and complete coverage of the affected surfaces takes longer.
Mistake to avoid: Stopping instrumentation after a predetermined number of strokes even though part of the affected root surface has not yet been covered.
Supporting reference: [11]
Oral surgery, pain control and anxiety
40. Consider temporomandibular disorders in third molar pain
Temporomandibular disorders can present with preauricular pain resembling that caused by pericoronitis. When assessing mandibular third molars, clinicians should examine the temporomandibular joints so this differential diagnosis is considered, rather than automatically attributing nearby pain to the tooth; this consideration does not replace a full diagnostic assessment.
Worked example: A patient reports preauricular pain near a partially erupted lower third molar, so the assessing clinician examines the temporomandibular joints and mouth opening before concluding whether third molar surgery is actually indicated.
Mistake to avoid: Diagnosing pericoronitis solely from the location of the patient's pain without assessing the temporomandibular joints as an alternative cause.
Supporting reference: [12]
41. Distinguish surgical assessment imaging from screening
RCS England guidance states that, after history taking and clinical examination, panoramic radiography is indicated for mandibular third molar assessment when surgical intervention is being considered. Routine screening of unerupted third molars is not recommended, so imaging requires individual justification rather than an automatic request; this does not extend to imaging every unerupted tooth.
Worked example: A dentist who has examined a patient with recurrent pericoronitis considers mandibular third molar surgery and requests a panoramic radiograph for that defined purpose, without screening the patient's other unerupted teeth, which show no individual indication.
Mistake to avoid: Requesting a radiograph automatically simply because a third molar has not erupted, without any history, examination or planned surgical intervention.
Supporting reference: [12]
42. Reserve third molar CBCT for a management question
The guidance gives a strong recommendation that CBCT should not be used routinely in the radiographic assessment of third molars, since it has no demonstrated effect on outcome and carries higher radiation dose and cost. Where conventional imaging shows a close relationship with the inferior dental nerve canal, CBCT may be useful when the findings would alter management decisions.
Worked example: When a panoramic radiograph suggests an intimate relationship between a mandibular third molar root and the inferior dental canal, the clinician first considers whether CBCT findings could change the planned management; without such a management question, the three-dimensional image alone does not justify the scan.
Mistake to avoid: Selecting CBCT merely because it provides a three-dimensional image, without any management question raised by conventional imaging.
Supporting reference: [12]
43. Assess paediatric extraction against alternatives
For children, SDCEP indicates extraction of an unrestorable or poor-prognosis primary or permanent tooth to relieve or avoid pain or infection when alternative management approaches are not feasible or are not in the child's best interests. Avoiding first-visit extraction under local anaesthesia is qualified rather than absolute, and the possibility of the child not returning once out of pain should be considered.
Worked example: A child with an unrestorable first primary molar and irreversible pulpitis has alternatives assessed first; because the family has previously missed appointments, the dentist weighs the risk of non-return against delaying extraction until coping improves, rather than applying extraction or postponement as an inflexible rule.
Mistake to avoid: Treating immediate extraction or postponement as an inflexible rule regardless of the individual child's coping ability and follow-up circumstances.
Supporting reference: [13]
44. Recognise local anaesthesia indications in children
SDCEP recommends local anaesthesia for any cavity preparation involving cutting sound dentine in both primary and permanent teeth, for any endodontic management and for extraction. Dentine in primary teeth is as sensitive as that of permanent teeth, so pain control should not be omitted because a tooth belongs to the primary dentition; the guidance does not select an agent or dose.
Worked example: A child needs a primary molar cavity preparation that will cut sound dentine; the dentist plans local anaesthesia within the stated recommendation, using behavioural support such as distraction, while recognising that the guidance does not prescribe a particular anaesthetic agent, dose or adult injection technique.
Mistake to avoid: Omitting appropriate pain control for a primary tooth preparation merely because the tooth belongs to the primary dentition.
Supporting reference: [14]
45. Use honest distraction during paediatric anaesthesia
Distraction shifts a child's attention away from local anaesthesia towards another action, such as verbal cues directing attention to the lip. Because evidence that interventions improve acceptance in children and young people is very limited, clinicians should explain honestly and avoid deceptive sleight-of-hand techniques that may create mistrust. Showing the syringe is a separate demonstration, offered only if the child wants to see it.
Worked example: Before a buccal infiltration in a nervous eight-year-old, the dentist explains she will feel the lip being gently pulled taut, keeps talking about that sensation throughout, and separately asks whether she would like to see the syringe before showing it.
Mistake to avoid: Telling a child the injection will not happen and then giving it secretly, which risks a lasting mistrust phobia.
Supporting reference: [14]
Recognition and response to medical emergencies
46. Call for an unresponsive person before assessing breathing
In the UK 2025 adult basic life support sequence, check that the scene is safe and whether the person is conscious. If they are unresponsive, call 999 immediately rather than confirming abnormal breathing first, then assess breathing while waiting for the call to be answered. If alone without a working phone, shout for help and follow the guidance's alternative arrangements.
Worked example: A dental nurse finds a collapsed patient in the waiting room, checks it is safe to approach, confirms he is unresponsive, and asks a colleague to dial 999 on speaker before anyone completes a breathing assessment, which begins while the call connects.
Mistake to avoid: Spending time confirming agonal breathing before calling 999, delaying the emergency call that the 2025 sequence places first.
Supporting reference: [17]
47. Recognise gasping as abnormal breathing
In an unresponsive adult, slow laboured breathing, agonal gasping and panting are abnormal patterns indicating that cardiac arrest should be assumed. A brief seizure-like episode can occur at the onset of arrest, so breathing should be assessed once it stops. If any doubt remains, the 999 call handler can assist, and doubt favours starting CPR without delay.
Worked example: A dental nurse finds a colleague collapsed and unresponsive on the waiting-room floor. Another staff member calls 999 immediately. Brief seizure-like limb movements stop, and breathing assessment reveals occasional agonal gasps rather than normal breathing; the team assumes cardiac arrest and starts CPR.
Mistake to avoid: Treating agonal gasps as normal breathing, or beginning the arrest decision without first establishing that the collapsed adult is unresponsive.
Supporting reference: [17]
48. Combine compression depth, rate and recoil
Adult chest compressions should be delivered to the lower half of the sternum at a depth of at least 5 cm but no more than 6 cm, at 100–120 per minute, with complete recoil and minimal interruptions. Meeting one parameter does not compensate for failing another, and competent performance requires practical training.
Worked example: During manikin practice a student achieves 110 compressions per minute at about 5.5 cm depth, but keeps her weight on the chest between compressions. Her trainer confirms the rate and depth fall within the adult ranges and corrects the incomplete recoil before the next cycle.
Mistake to avoid: Counting compressions aloud to maintain rate while leaning on the chest, so recoil stays incomplete despite acceptable speed.
Supporting reference: [17]
49. Follow AED prompts and resume compressions promptly
Apply the AED as soon as one is available, attaching pads to the bare chest in the positions shown, and follow the device's audio and visual prompts. Nobody may touch the patient during rhythm analysis or shock delivery. Whether the device shocks or advises no shock, chest compressions must restart immediately, continuing to follow prompts.
Worked example: During a collapse in the waiting room, a team member applies pads to the patient's bare chest, clears everyone during analysis, steps back for a semi-automatic device's shock, and resumes compressions immediately as prompted.
Mistake to avoid: Treating a no-shock prompt as a reason to stop resuscitation instead of immediately restarting chest compressions and following further prompts.
Supporting reference: [17]
50. Recognise severe anaphylaxis and summon emergency help
Severe anaphylaxis may present with marked laryngeal oedema and bronchospasm, producing stridor and wheezing, alongside systemic features such as tachycardia, abdominal pain, vomiting and a sense of impending doom. Recognition triggers emergency escalation: assess the patient and call an ambulance, because transfer to hospital is the priority.
Worked example: A patient develops sudden stridor, wheezing and flushing during treatment. The dental team stops the procedure, assesses the patient, and calls an ambulance immediately so that emergency hospital transfer can be arranged without delay.
Mistake to avoid: Managing stridor and wheezing as a minor allergy and choosing observation alone instead of emergency assessment and an immediate ambulance call.
Supporting reference: [18]
Communication and safe teamwork
51. Check understanding rather than delivery alone
Delivering information, whether spoken or written, does not by itself show that a patient has understood it. The clinician should ask questions and summarise the main points of the discussion to satisfy themselves that the patient has grasped what is needed before the treatment decision is made.
Worked example: After discussing extraction options, the dentist asks the patient to describe the choice in her own words. Her summary reveals confusion about risks, so the dentist clarifies the misunderstanding before she confirms her decision.
Mistake to avoid: Assuming that handing over a leaflet or delivering an explanation proves the patient understood the information given.
Supporting reference: [16]
52. Adapt communication to language and access needs
Patients' communication difficulties vary, so support must match the individual need. Appropriate responses include avoiding professional jargon and acronyms, arranging an interpreter for patients whose first language is not English, and providing an induction loop for patients who wear hearing aids, rather than relying on one approach for every barrier.
Worked example: A patient whose first language is not English struggles during a consultation. The practice arranges an interpreter and the dentist explains the treatment plan in plain language instead of repeating technical English more loudly.
Mistake to avoid: Reading a nod of agreement as proof that an unresolved communication barrier has disappeared during the consultation.
Supporting reference: [16]
53. Record decisions made with colleagues
When you discuss a patient's treatment with a colleague, you should document the discussion in that patient's notes, including any decisions reached or changed. This creates an accessible clinical record so that subsequent clinicians can follow the agreed plan without relying on anyone's memory. The principle supports clinical communication but does not prescribe the technical content of laboratory prescriptions.
Worked example: A dentist asks a colleague's opinion about a restorative option for a patient, and the colleague's advice changes the planned approach. The dentist records the discussion and the agreed change in the patient's notes so the whole team can follow the updated plan.
Mistake to avoid: Leaving subsequent clinicians dependent on an undocumented conversation, so the reasoning behind a changed treatment plan cannot be traced or verified.
Supporting reference: [16]
54. Make delegated decisions and actions explicit
Team members should understand their roles and responsibilities, including which decisions and actions have, and have not, been delegated to them. Separately, anyone carrying out a task or type of treatment must be appropriately trained, competent, confident and indemnified before proceeding. These are distinct obligations, and vague instructions leave the limits of delegated decision-making unclear.
Worked example: A principal dentist asks a dental therapist who is appropriately trained, competent, confident and indemnified to place defined restorations, explaining which treatment-planning decisions remain with the dentist and recording the delegation so the whole team understands the agreed boundaries.
Mistake to avoid: Giving a vague instruction such as asking a colleague to help out without clarifying which clinical decisions remain delegated and which do not.
Supporting reference: [16]
55. Escalate safety concerns through an appropriate route
You must act on safety concerns promptly, because delay can allow poor practice to become a serious risk to patients. Where possible, raise concerns first with your employer or manager, but if they are the source of the concern or fail to act, you must use an appropriate alternative route, chosen according to the concern and UK jurisdiction.
Worked example: A dental nurse notices sterilisation steps being skipped, and the practice manager, who introduced the shortcuts, dismisses the issue. Because the manager is the source of the concern, the nurse promptly escalates to an appropriate external body rather than relying on local reporting alone.
Mistake to avoid: Insisting on local reporting when the manager is the source of the risk, delaying protection of patients who may be harmed.
Supporting reference: [16]
56. Create a team culture that protects reporting
If you employ, manage or lead a team, you must encourage and support a culture where staff can raise concerns openly and without fear of reprisal. You must also ensure an effective concerns procedure exists, is readily available to all staff and is followed at all times. A written policy alone is insufficient if staff are discouraged from using it.
Worked example: A practice owner introduces a concerns procedure, keeps it readily accessible to all staff, and when a dental nurse raises a justified worry about equipment maintenance, the owner thanks her, arranges an investigation and ensures she suffers no reprisal for reporting.
Mistake to avoid: Keeping a formal written procedure while penalising or silencing staff who report safety problems, which deters future concerns.
Supporting reference: [16]
Clinical insight, evidence and resource decisions
57. Assess present readiness to deliver safe care
Readiness to deliver care requires being appropriately trained, competent, confident and indemnified, while working only within present mental and physical capabilities. Previous training alone does not establish readiness for the current situation. Where confidence to provide treatment is lacking, the standard requires referring the patient to an appropriately trained colleague rather than proceeding.
Worked example: A dentist whose hand pain has reduced grip strength judges that a planned surgical extraction exceeds current physical capability and that they lack confidence to provide it, so they do not proceed and refer the patient to an appropriately trained colleague.
Mistake to avoid: Assuming that a qualification gained years ago removes the need to reassess present capability and confidence before starting treatment.
Supporting reference: [16]
58. Separate evidence certainty from recommendation strength
GRADE certainty describes confidence in an effect estimate, while recommendation strength describes how broadly a recommended course applies. A conditional recommendation means different choices can be appropriate for individual patients, so the clinician should help each patient reach a management decision consistent with that patient's values and preferences rather than treating one option as mandatory.
Worked example: For a moderate caries lesion on a vital, non-endodontically treated permanent tooth requiring a restoration without pulp therapy, a conditional, very-low-certainty suggestion to prioritise selective carious tissue removal is discussed with the patient as one appropriate choice among alternatives.
Mistake to avoid: Assuming that a published recommendation proves the underlying evidence is of high certainty, or that a conditional recommendation permits only one choice.
Supporting reference: [5]
59. Justify and document departures from guidance
Good quality care should be based on current evidence and authoritative guidance. When a clinician departs from established practice or guidance, the source says the reasons should be recorded and the decision should be justifiable; recording a reason does not by itself make an unsafe or otherwise unjustified departure acceptable.
Worked example: A patient with a documented severe allergy to a component of the recommended material receives an alternative restorative approach; the clinician records the allergy, the clinical reasoning and the evidence supporting the chosen alternative, and can explain the decision if asked.
Mistake to avoid: Treating a personal preference, or the mere existence of a written explanation, as sufficient justification for any departure from guidance.
Supporting reference: [16]
60. Seek the right advice for equipment uncertainty
HTM 01-05's 2013 edition states that the User, who has day-to-day responsibility for decontamination equipment and processes, should seek advice from manufacturers or the service engineer on how to carry out equipment testing and daily tasks. Uncertainty about an unfamiliar device should be resolved for that actual equipment rather than by improvising or borrowing another machine's method.
Worked example: A User preparing for a periodic test on an unfamiliar decontamination device is unsure how to perform it; rather than assuming another machine's method applies, he consults the manufacturer's instructions and, where doubt remains, the service engineer before testing.
Mistake to avoid: Borrowing a different machine's testing method without confirming it suits the actual equipment, or assigning a test schedule without verifying which device it covers.
Supporting reference: [15]
Sources and complete official outline
- RCS England
- RCS England
- RCS England
- GDC
- ADA
- SDCEP
- British Endodontic Society
- MedEdPORTAL
- International Journal of Dentistry
- JCDA
- SDCEP
- Royal College of Surgeons of England
- SDCEP
- SDCEP
- Department of Health
- GDC
- Resuscitation Council UK
- SDCEP Drug Prescribing for Dentistry