ADC Part 1 Endodontics: High-Yield Topics, Example Questions & Study Tips
Endodontics carries roughly 10% of the ADC Part 1 written exam - ≈28 of 280 questions. Below: the high-yield topics to master, the classic traps that cost candidates marks, an ADC-style example question, and how to study this subject efficiently.
High-yield topics for Endodontics
| Topic | What to focus on |
|---|---|
| Pulpal & periapical diagnosis | reversible vs irreversible pulpitis, necrosis, symptomatic vs asymptomatic apical periodontitis |
| Sensibility testing | cold/EPT reliability, false positives/negatives, immature and traumatised teeth |
| Dental trauma | avulsion protocols (storage media, replantation timing), luxation types, follow-up schedules |
| Working length & instrumentation | apex locator use, patency, common procedural errors (ledging, perforation) |
| Irrigation & medicaments | NaOCl concentrations and accidents, EDTA role, calcium hydroxide uses |
| Endo-perio lesions | primary endo vs primary perio vs true combined - vitality is the discriminator |
| Immature apices | apexification vs apexogenesis vs regenerative endo |
Common areas candidates struggle with
- The reversible vs irreversible pulpitis distinction - lingering thermal pain is the key tell for irreversible
- Dental trauma protocols - IADT guidelines for avulsion, luxation and root fracture are commonly examined
- NaOCl accident recognition and management sequence
- Distinguishing primary endo, primary perio and true combined endo-perio lesions using vitality testing
- Immature apex management - apexification vs apexogenesis vs regenerative endodontics decision-making
Classic exam traps
- Lingering vs non-lingering pain - lingering thermal pain = irreversible pulpitis; brief = reversible
- Avulsed primary teeth are NEVER replanted; permanent teeth: milk/saline storage, replant ASAP
- Diagnosing from radiographs alone - a periapical radiolucency with a vital pulp is not endodontic
- NaOCl accident management order: irrigate saline, reassure, analgesia, monitor - not antibiotics first
Example ADC-style question
Question
A 10-year-old boy has had a permanent upper central incisor avulsed 40 minutes ago. The tooth was picked up by the crown and transported in cold cow's milk. What is the most appropriate immediate management?
- Do not replant; refer for prosthodontic replacement
- Rinse the root gently with saline, replant, splint flexibly for 2 weeks
- Soak the tooth in bleach for 10 minutes to remove necrotic tissue, then replant
- Immediately begin root canal treatment before replantation
Answer: B
Extra-oral dry time is short and milk is an appropriate storage medium - periodontal ligament cells are still viable. Rinse gently with saline (do not scrub the root), replant, and splint flexibly for approximately 2 weeks. Root canal treatment is initiated 7-10 days after replantation, not before. Bleach damages the PDL.
This is one worked example. There are hundreds more scenario-based endodontics MCQs inside the PassADC question bank - with per-option explanations on the ones that matter most.
Key concepts to revise
- Reversible vs irreversible pulpitis discriminators (lingering pain)
- Pulpal × periapical diagnosis matrix - all combinations
- Avulsion protocol (open apex vs closed apex, storage media, timing)
- Luxation classifications and management
- NaOCl accident management sequence
- Endo-perio lesion classification and vitality testing
- Working length determination - apex locator vs radiograph
- Immature apex - apexification vs apexogenesis vs regenerative endo
How to study Endodontics for the ADC Part 1
- Memorise the diagnosis matrix (pulpal × periapical) - most endo questions are two-part diagnoses
- Trauma tables (IADT guidelines) are pure marks: injury → management → review schedule
How to test your readiness in Endodontics
The exam tests this subject through clinical vignettes, so practise it the same way - scenario-based MCQs with explanations, not isolated fact recall. The fastest way to know whether endodontics is a strength or a gap is to take a diagnostic across all 10 subjects and compare your accuracy in this subject against the exam weighting.
Once you know where you stand, target the weak areas above with daily practice, review every wrong answer's explanation the same day, and sit at least two full-length timed mocks before booking the real exam.
Want to see whether endodontics is actually one of your weak areas?
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Check my ADC readinessRelated ADC Part 1 resources
Start with the ADC Part 1 preparation hub, plan the next 8 weeks with the study guide, or drill more endodontics MCQs in the question bank. Also see the full ADC Part 1 exam format guide and how to pass ADC Part 1.
Frequently asked questions
How much endodontics is on the ADC Part 1 exam?
Approximately 10% - about 28 of 280 questions. Pulpal diagnosis and dental trauma protocols are the highest-yield areas.
How do you differentiate reversible from irreversible pulpitis?
The key is duration after stimulus removal. Brief pain lasting seconds to under a minute after a cold stimulus = reversible pulpitis. Lingering pain lasting minutes, or spontaneous throbbing pain, = irreversible pulpitis. Location may also be more localisable in irreversible pulpitis.
What is the correct management of an avulsed permanent tooth?
Rinse gently with saline, replant as soon as possible, splint flexibly for approximately 2 weeks, and begin root canal treatment 7-10 days after replantation (for closed apex teeth). Storage media in order of preference: HBSS, milk, saline. Never scrub the root or use bleach.
Should you replant an avulsed primary tooth?
No. Avulsed primary teeth are never replanted because of risk to the underlying permanent successor. Manage with reassurance, analgesia and monitoring of the permanent successor's development.
Where do you actually stand?
30 questions weighted to the official ADC blueprint. Free, instant, no credit card.
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PassADC is an independent study platform and is not affiliated with, endorsed by, or sponsored by the Australian Dental Council. Exam details change - always confirm current format and fees at adc.org.au.