Primary Examination Overview
These notes are designed to guide candidates preparing for the Australian Dental Council (ADC) Primary Examination (PE). The exam assesses foundational knowledge in dental sciences at an entry-to-practice level. The official ADC handbook and competency documents are the definitive sources; candidates must verify all details with the ADC. The practice baseline format is 80 questions in 120 minutes with a 70% pass mark, but the official format may vary.
For Dental Conquer practice planning, this module is tracked as 80 questions over about 120 minutes with a listed pass mark of 70%. Treat those numbers as practice baselines and verify the current official format before scheduling.
How This Guide Is Organized
The sections below turn the syllabus into studyable subject blocks. Read a subject first, explain the must-know ideas without notes, then use questions and flashcards to test whether the knowledge holds under pressure.
- Craniofacial Anatomy and Tooth Morphology
- Radiation Physics and Diagnostic Imaging
- Infection Control and Sterilization Protocols
- Dental Materials and Laboratory Procedures
- Oral Pathology and Clinical Pharmacology
- Patient Assessment and Emergency Management
Exam Snapshot and Readiness Target
Format: Written examination; typically multiple-choice questions (MCQs) covering six core subjects.
Candidate level: Entry-to-practice for dentists seeking registration in Australia or New Zealand.
Readiness target: Candidates should demonstrate comprehensive understanding of basic dental sciences and clinical application.
Most candidates should budget at least 38+ focused study hours, then adjust upward for unfamiliar clinical systems, regulatory content, or specialty-level case reasoning.
Craniofacial Anatomy and Tooth Morphology
Syllabus Focus
- Head and neck anatomy
- Oral cavity and associated structures
- Tooth morphology and eruption sequences
- Temporomandibular joint and masticatory muscles
- Neurovascular supply of the head and neck
Key Notes
- Understand the anatomical relationships of the trigeminal nerve (CN V) divisions: ophthalmic (V1), maxillary (V2), and mandibular (V3).
- Know the origin, insertion, action, and innervation of muscles of mastication (temporalis, masseter, medial and lateral pterygoids).
- Tooth morphology: permanent and deciduous dentition, including crown and root anatomy, occlusal features, and eruption timelines.
- Blood supply: external carotid artery branches (facial, maxillary, superficial temporal) and venous drainage via pterygoid plexus.
- Lymphatic drainage of the head and neck: submental, submandibular, and deep cervical nodes.
- Temporomandibular joint: articular surfaces, disc, ligaments, and movements (rotation and translation).
- Paranasal sinuses: maxillary, frontal, ethmoidal, and sphenoid - their drainage pathways and clinical relevance to dental infections.
Must Know
- Identify all permanent teeth using universal numbering system (1-32) and FDI notation.
- Describe the eruption sequence of primary and permanent teeth.
- Locate and name the major foramina of the skull (e.g., foramen ovale, rotundum, spinosum) and their contents.
- Trace the course of the mandibular nerve and its branches (inferior alveolar, lingual, buccal).
- Explain the anatomy of the temporomandibular joint and common disorders (e.g., disc displacement).
Clinical and Exam Application
- Local anesthesia: understanding nerve pathways for inferior alveolar nerve block and maxillary infiltration.
- Exodontia: knowledge of root morphology and proximity to sinuses or neurovascular bundles.
- Radiographic interpretation: identifying anatomical landmarks (e.g., mental foramen, maxillary sinus).
- Management of orofacial pain: differential diagnosis involving TMJ disorders, trigeminal neuralgia, and dental pathology.
High-Yield Distinctions
- Differences between primary and permanent teeth: enamel thickness, pulp chamber size, root resorption.
- Mandibular vs. maxillary teeth: root curvature, number of roots, and occlusal anatomy.
- Muscles of mastication vs. muscles of facial expression: innervation (trigeminal vs. facial nerve).
- Arterial supply: maxillary artery branches (pterygopalatine, infraorbital, greater palatine) vs. facial artery.
- Lymph node levels: Level I (submental/submandibular) vs. Level II (upper jugular) for oral cancer staging.
Common Pitfalls
- Confusing the mandibular division of CN V with the facial nerve (CN VII) for motor functions.
- Misidentifying tooth numbers: e.g., tooth #1 vs. #16 (maxillary third molars).
- Forgetting that the maxillary sinus floor is close to the roots of premolars and molars.
- Overlooking the pterygoid plexus as a site for infection spread.
- Assuming all deciduous teeth are replaced by permanent teeth (excluding molars).
Review Tasks
- Draw and label a diagram of the trigeminal nerve divisions.
- Practice identifying teeth on a dental model or chart.
- Create a table of muscles of mastication with origin, insertion, action, and nerve supply.
- Review skull anatomy using an atlas or 3D app.
- Complete a self-quiz on eruption sequences and tooth numbering systems.
Radiation Physics and Diagnostic Imaging
Syllabus Focus
- Physics of X-ray production
- Radiation safety and protection
- Intraoral and extraoral imaging techniques
- Image interpretation principles
- Quality assurance in dental radiography
Key Notes
- X-rays are produced when high-speed electrons strike a metal target (tungsten) in the X-ray tube; the process involves bremsstrahlung and characteristic radiation.
- Key components of an X-ray tube: cathode (filament), anode (target), and focusing cup.
- Factors affecting X-ray beam quality and quantity: kVp (peak kilovoltage), mA (milliamperage), and exposure time.
- Radiation units: absorbed dose (gray), equivalent dose (sievert), effective dose (sievert).
- Biological effects: deterministic (threshold) vs. stochastic (non-threshold) effects; dental doses are low but cumulative.
- ALARA principle: As Low As Reasonably Achievable - use collimation, filtration, fast films/sensors, and proper technique.
- Intraoral techniques: periapical (paralleling vs. bisecting angle), bitewing, and occlusal radiographs.
Must Know
- Describe the inverse square law and its application in radiation safety.
- List the components of a dental X-ray machine and their functions.
- Explain the difference between direct and indirect digital imaging.
- Identify common radiographic errors: elongation, foreshortening, cone cut, and overlapping.
- State the recommended safety measures: lead apron, thyroid collar, and proper positioning.
Clinical and Exam Application
- Selecting appropriate radiographic views for caries detection, periodontal assessment, and periapical pathology.
- Interpreting panoramic radiographs: identifying anatomical landmarks and common pathologies.
- Using cone-beam computed tomography (CBCT) for implant planning and impacted tooth assessment.
- Applying radiation protection for pregnant patients and children.
High-Yield Distinctions
- Paralleling vs. bisecting angle technique: advantages and disadvantages.
- Digital vs. film-based radiography: speed, dose reduction, and image manipulation.
- Periapical vs. bitewing radiographs: diagnostic purposes and indications.
- Panoramic vs. intraoral radiographs: coverage, distortion, and resolution.
- CBCT vs. medical CT: lower dose, higher resolution for dental structures.
Common Pitfalls
- Confusing kVp (controls penetration) with mA (controls quantity).
- Forgetting that lead aprons do not protect against scattered radiation from the tube head.
- Misinterpreting radiolucent vs. radiopaque structures (e.g., caries is radiolucent).
- Overlooking the need for quality assurance tests (e.g., stepwedge, film processor checks).
- Assuming all digital sensors have the same sensitivity.
Review Tasks
- Calculate exposure time using the inverse square law.
- Practice mounting and interpreting a full-mouth series.
- Create a checklist for infection control in radiography.
- Review common radiographic artifacts and their causes.
- Study the anatomy of the maxillary sinus on a panoramic radiograph.
Infection Control and Sterilization Protocols
Syllabus Focus
- Standard precautions and transmission-based precautions
- Hand hygiene and personal protective equipment (PPE)
- Instrument processing: cleaning, disinfection, sterilization
- Dental unit waterline management
- Regulatory standards (e.g., Australian Standards, ADA guidelines)
Key Notes
- Standard precautions apply to all patients: hand hygiene, PPE, safe injection practices, and respiratory hygiene.
- Hand hygiene: use alcohol-based hand rub unless hands are visibly soiled; wash with soap and water for at least 20 seconds.
- PPE includes gloves, masks, protective eyewear, and gowns; change between patients.
- Instrument processing: cleaning (removal of debris) → disinfection (kills most microorganisms) → sterilization (kills all microorganisms including spores).
- Sterilization methods: steam autoclave (most common), dry heat, chemical vapor, and ethylene oxide.
- Monitoring sterilization: mechanical (gauges), chemical (indicators), and biological (spore tests).
- Dental unit waterlines: biofilm formation; use antimicrobial agents or regular flushing to maintain <500 CFU/mL.
Must Know
- List the steps for reprocessing a dental handpiece.
- Describe the correct order for donning and doffing PPE.
- Explain the difference between critical, semi-critical, and non-critical instruments.
- State the recommended sterilization parameters for steam autoclave (e.g., 121°C for 15 min or 134°C for 3 min).
- Identify the appropriate disinfectant for surfaces (e.g., sodium hypochlorite, alcohol).
Clinical and Exam Application
- Setting up a sterile field for surgical procedures.
- Managing a needlestick injury: immediate first aid, reporting, and post-exposure prophylaxis.
- Implementing infection control during radiography: barrier protection and sensor covers.
- Conducting a spore test weekly to ensure autoclave efficacy.
High-Yield Distinctions
- Sterilization vs. disinfection: sterilization eliminates all microbes; disinfection reduces but does not eliminate spores.
- Autoclave vs. dry heat: autoclave uses moist heat (steam) and is faster; dry heat requires higher temperatures and longer times.
- Chemical indicators (e.g., tape) vs. biological indicators (spore strips): chemical shows exposure; biological confirms killing.
- Critical (e.g., surgical instruments) vs. semi-critical (e.g., mouth mirrors) vs. non-critical (e.g., blood pressure cuff).
- Hand hygiene: alcohol-based rub is more effective than soap and water for most pathogens except norovirus and C. difficile.
Common Pitfalls
- Reusing single-use items (e.g., needles, local anesthetic cartridges).
- Improper storage of sterilized instruments (e.g., open pouches).
- Failing to clean instruments before sterilization (organic material protects microbes).
- Using incorrect dilution for disinfectants.
- Neglecting to flush dental unit waterlines at the start of the day.
Review Tasks
- Write a step-by-step protocol for instrument reprocessing.
- Practice donning and doffing PPE in correct sequence.
- Review the Australian Standards for dental infection control (AS/NZS 4815).
- Create a checklist for autoclave monitoring.
- Simulate a needlestick injury response.
Dental Materials and Laboratory Procedures
Syllabus Focus
- Properties of dental materials (mechanical, physical, biological)
- Restorative materials: composites, amalgam, glass ionomer, ceramics
- Impression materials: alginate, silicone, polyether
- Cements and bonding agents
- Laboratory procedures: model pouring, waxing, casting
Key Notes
- Mechanical properties: strength (compressive, tensile, shear), hardness, elasticity, and toughness.
- Physical properties: thermal conductivity, coefficient of thermal expansion, and solubility.
- Composites: resin matrix with filler particles; classified by filler size (macro, micro, hybrid, nanofill).
- Amalgam: alloy of mercury with silver, tin, copper; high compressive strength but poor aesthetics.
- Glass ionomer: releases fluoride, bonds chemically to tooth structure, but low fracture resistance.
- Impression materials: alginate (irreversible hydrocolloid) for study models; silicone (addition or condensation) for final impressions.
- Cements: zinc phosphate (luting), glass ionomer (luting/restorative), resin cement (bonding).
Must Know
- Compare and contrast composite and amalgam: indications, contraindications, and placement techniques.
- Explain the setting reaction of dental amalgam and the importance of trituration.
- Describe the steps for taking an alginate impression and pouring a study model.
- List the ideal properties of a dental cement.
- Identify common causes of post-operative sensitivity with composite restorations.
Clinical and Exam Application
- Selecting restorative material based on cavity location, size, and aesthetic demands.
- Using rubber dam isolation for composite placement to avoid moisture contamination.
- Mixing and dispensing impression materials correctly to avoid voids or distortion.
- Applying bonding agents: etch, prime, bond - total-etch vs. self-etch systems.
High-Yield Distinctions
- Addition silicone vs. condensation silicone: addition has better dimensional stability and no byproducts.
- Type I (high copper) vs. Type II (low copper) amalgam: high copper has less creep and corrosion.
- Resin-modified glass ionomer vs. conventional glass ionomer: RMGI has improved strength and adhesion.
- Zinc phosphate vs. glass ionomer cement: zinc phosphate is more acidic initially; GI bonds chemically.
- Light-cure vs. self-cure composites: light-cure allows controlled working time.
Common Pitfalls
- Over-triturating amalgam, leading to reduced strength.
- Contaminating composite with saliva or blood, causing bond failure.
- Using expired impression materials (check date).
- Pouring models too late, causing distortion of alginate impressions.
- Mixing cement too thick or too thin, affecting film thickness and strength.
Review Tasks
- Practice mixing and placing composite in a simulated cavity.
- Prepare a study model from an alginate impression.
- Create a comparison table of dental cements.
- Review the steps for a crown and bridge impression.
- Study the chemical composition of common dental materials.
Oral Pathology and Clinical Pharmacology
Syllabus Focus
- Oral mucosal lesions: ulcerative, vesiculobullous, white/red lesions
- Odontogenic and non-odontogenic cysts and tumors
- Salivary gland pathology
- Pharmacology: local anesthetics, analgesics, antibiotics, antifungals
- Drug interactions and medical emergencies in dentistry
Key Notes
- Oral ulcerations: traumatic, aphthous, herpetic (HSV-1), and recurrent aphthous stomatitis (RAS).
- White lesions: leukoplakia (premalignant), lichen planus (reticular/erosive), candidiasis (pseudomembranous).
- Red lesions: erythroplakia (high malignant potential), inflammatory conditions.
- Odontogenic cysts: radicular (most common), dentigerous, keratocystic odontogenic tumor (KCOT).
- Odontogenic tumors: ameloblastoma (benign but aggressive), odontoma (hamartoma).
- Local anesthetics: lidocaine (most common), articaine, bupivacaine; maximum doses and toxicity.
- Analgesics: NSAIDs (ibuprofen), acetaminophen, opioids; use in dental pain management.
- Antibiotics: amoxicillin (first-line), clindamycin (for penicillin allergy), metronidazole (for anaerobic infections).
Must Know
- Differentiate between herpes simplex and aphthous ulcers based on location and appearance.
- List the clinical features and management of oral candidiasis.
- Describe the radiographic appearance of a radicular cyst vs. dentigerous cyst.
- State the maximum recommended dose of lidocaine with epinephrine (7 mg/kg).
- Identify common drug interactions: NSAIDs with anticoagulants, antibiotics with oral contraceptives.
Clinical and Exam Application
- Performing a biopsy for suspicious oral lesions.
- Prescribing antibiotics for odontogenic infections: amoxicillin 500 mg TID for 5-7 days.
- Managing a patient on warfarin: check INR, consult physician, avoid NSAIDs.
- Recognizing signs of local anesthetic toxicity: perioral numbness, metallic taste, seizures.
High-Yield Distinctions
- Radicular cyst vs. dentigerous cyst: radicular at apex of non-vital tooth; dentigerous surrounds crown of unerupted tooth.
- Ameloblastoma vs. KCOT: ameloblastoma is solid/multilocular; KCOT is cystic with high recurrence.
- Lichen planus vs. leukoplakia: lichen planus has Wickham striae; leukoplakia is a clinical diagnosis of exclusion.
- Herpes simplex (vesicles on keratinized mucosa) vs. aphthous (ulcers on non-keratinized mucosa).
- Acetaminophen vs. NSAIDs: acetaminophen has no anti-inflammatory effect; NSAIDs inhibit COX enzymes.
Common Pitfalls
- Confusing erythroplakia with inflammatory lesions (biopsy is mandatory).
- Prescribing antibiotics for viral infections (e.g., herpes).
- Exceeding maximum dose of local anesthetic, especially in children.
- Forgetting to ask about allergies (e.g., penicillin, sulfa).
- Misdiagnosing a periapical abscess as a cyst without radiograph.
Review Tasks
- Create a flowchart for differential diagnosis of oral ulcers.
- Practice calculating local anesthetic doses for a 70 kg adult.
- Review common oral pathology images and descriptions.
- Study the antibiotic prophylaxis guidelines for infective endocarditis.
- Write a prescription for a dental infection.
Patient Assessment and Emergency Management
Syllabus Focus
- Medical history taking and vital signs
- Risk assessment and management of medically compromised patients
- Common dental emergencies: toothache, abscess, trauma, hemorrhage
- Medical emergencies in the dental office: syncope, allergic reaction, hypoglycemia, cardiac arrest
- Basic life support (BLS) and emergency drugs
Key Notes
- Medical history: include medications, allergies, bleeding disorders, cardiovascular disease, diabetes, pregnancy.
- Vital signs: blood pressure, heart rate, respiratory rate, temperature; normal ranges and significance.
- ASA classification: assess patient's physical status (ASA I to V).
- Dental emergencies: pulpitis (reversible vs. irreversible), periapical abscess, periodontal abscess, fractured tooth.
- Trauma: avulsion, luxation, fracture; management depends on tooth type and time.
- Medical emergencies: syncope (most common), allergic reaction (mild to anaphylaxis), hypoglycemia, angina, cardiac arrest.
- Emergency drugs: oxygen, epinephrine (1:1000 for anaphylaxis), nitroglycerin (angina), glucose (hypoglycemia), aspirin (MI).
Must Know
- Take and record blood pressure correctly.
- List the steps for managing an avulsed permanent tooth: replant immediately or store in milk/saline.
- Describe the management of anaphylaxis: IM epinephrine, call emergency services.
- Identify signs of hypoglycemia: sweating, confusion, tachycardia; treat with oral glucose or IV dextrose.
- Perform basic life support: check responsiveness, call for help, chest compressions, rescue breaths.
Clinical and Exam Application
- Modifying dental treatment for patients on anticoagulants (e.g., warfarin, DOACs).
- Using local anesthetic with epinephrine cautiously in patients with severe cardiovascular disease.
- Managing a patient with a history of infective endocarditis: antibiotic prophylaxis as per guidelines.
- Recognizing and managing a vasovagal syncope: position patient supine, legs elevated, monitor vitals.
High-Yield Distinctions
- Reversible vs. irreversible pulpitis: reversible responds to cold with sharp pain that subsides; irreversible has lingering pain.
- Periapical abscess vs. periodontal abscess: periapical from pulp necrosis; periodontal from periodontitis.
- Anaphylaxis vs. vasovagal syncope: anaphylaxis has urticaria, wheezing, hypotension; syncope has bradycardia, pallor.
- Hypoglycemia vs. hyperglycemia: hypoglycemia has rapid onset, sweating, confusion; hyperglycemia has gradual onset, fruity breath.
- Angina vs. myocardial infarction: angina relieved by rest/nitroglycerin; MI has persistent pain, nausea, diaphoresis.
Common Pitfalls
- Failing to take a complete medical history before treatment.
- Not recognizing early signs of anaphylaxis (e.g., itching, hives).
- Using epinephrine in a patient with unstable angina or recent MI.
- Forgetting to check blood glucose in a diabetic patient with altered consciousness.
- Performing CPR without calling for emergency medical services.
Review Tasks
- Practice taking vital signs on a peer.
- Create a quick-reference card for emergency drugs and doses.
- Simulate a medical emergency scenario (e.g., anaphylaxis).
- Review the American Heart Association BLS algorithm.
- Study the management of dental trauma using the IADT guidelines.
How To Use These Notes With Practice Questions
Do not jump straight from reading to a full mock. Work by subject first: review the key notes, make a short recall sheet from memory, then answer a focused question set. After each miss, decide whether the problem was missing knowledge, poor clinical sequencing, weak source-rule recall, or a distractor you failed to eliminate.
Dental Conquer's question bank, flashcards, mind maps, and spaced review tools are most useful after this instruction layer because they reveal which parts of the notes are not yet retrievable.
Final Review Checklist
- Revisit the ADC handbook and competency documents to ensure alignment with exam expectations.
- Focus on high-yield topics: tooth morphology, radiation safety, infection control, material properties, oral pathology, and emergency management.
- Practice interpreting radiographs and identifying anatomical landmarks.
- Review drug doses, interactions, and emergency protocols until they are automatic.
- Use active recall: create flashcards, teach concepts to a peer, or write summaries without notes.
- Take timed practice tests to build speed and endurance (80 questions in 120 minutes).
- Verify any uncertain details with official ADC sources or the Dental Conquer platform.
Official Sources and Further Reading
Use these sources as the final authority for format, eligibility, rules, and exam updates. Study notes are a preparation layer, not a replacement for official candidate guidance.