ADC Part 1 Operative Dentistry: High-Yield Topics, Example Questions & Study Tips
Operative Dentistry 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 Operative Dentistry
| Topic | What to focus on |
|---|---|
| Caries risk & management | ICDAS/ICCMS thinking, when to monitor vs restore, fluoride regimens by risk |
| Minimal intervention dentistry | selective (partial) caries removal, stepwise excavation, sealing dentine |
| Adhesion | etch-and-rinse vs self-etch, enamel vs dentine bonding differences, C-factor |
| Composite technique | incremental placement, polymerisation shrinkage stress, common failure causes |
| Amalgam vs composite vs GIC | indications, longevity evidence, GIC fluoride release and when it's the right call |
| Deep caries & pulp protection | liners/bases, indirect pulp cap decision-making, tricalcium silicates |
| Tooth wear | erosion vs attrition vs abrasion patterns, aetiology-based management |
Common areas candidates struggle with
- Modern minimum-intervention caries management - selective removal is now the exam-correct answer in deep lesions
- Wet bonding technique for etch-and-rinse dentine adhesion
- Choosing GIC over composite in specific clinical scenarios (moisture, cervical margins, high caries risk)
- Diagnosing tooth wear aetiology from wear pattern location
- Deciding between indirect pulp cap, direct pulp cap and root canal treatment in deep caries
Classic exam traps
- Complete caries removal in deep lesions near the pulp - modern answer is selective removal to avoid exposure
- Etching dentine too long / desiccating dentine - 'wet bonding' concepts are commonly tested
- Choosing composite in uncontrollable moisture - GIC is often the exam's intended answer
- Misreading wear patterns: palatal wear on upper anteriors = intrinsic erosion (reflux/vomiting) until proven otherwise
Example ADC-style question
Question
A 24-year-old presents with palatal cupping and thinning of the enamel on maxillary anterior teeth. Occlusal surfaces of posterior teeth show early cupping. There is no history of grinding. What is the most likely aetiology?
- Attrition from parafunction
- Abrasion from over-vigorous brushing
- Intrinsic erosion (gastric acid - reflux or vomiting)
- Abfraction from occlusal loading
Answer: C
Palatal cupping of upper anterior teeth is the classic pattern of intrinsic acid erosion - most commonly gastro-oesophageal reflux, chronic vomiting or an eating disorder. Attrition affects occlusal surfaces symmetrically; abrasion is cervical from brushing; abfraction is cervical at the CEJ from loading. Palatal enamel loss on uppers is a red flag for intrinsic acid.
This is one worked example. There are hundreds more scenario-based operative dentistry MCQs inside the PassADC question bank - with per-option explanations on the ones that matter most.
Key concepts to revise
- Selective caries removal - when and how (modern MI approach)
- Wet dentine bonding technique
- Composite vs amalgam vs GIC indications
- Wear pattern locations and their aetiologies
- Deep caries decision tree (indirect pulp cap vs direct pulp cap vs RCT)
- Ferrule effect and its role in restoration success
- Isolation methods and their impact on adhesive restoration success
How to study Operative Dentistry for the ADC Part 1
- Think 'lesion → risk → least invasive effective option' - the exam rewards conservative modern dentistry
- Know the 3 wear patterns with their classic locations cold
How to test your readiness in Operative Dentistry
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 operative dentistry 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 operative dentistry is actually one of your weak areas?
6 ADC-style questions across the top subjects. Free, instant, no credit card.
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 operative dentistry 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
What is minimum-intervention caries management?
An approach that removes only infected/soft dentine near the enamel-dentine junction, leaves affected dentine near the pulp (selective caries removal), and seals the cavity with a biological restoration. It reduces pulp exposure risk and preserves tooth structure.
When should GIC be used instead of composite?
GIC is often preferred where moisture control is compromised (cervical margins, subgingival), in high caries-risk patients (for fluoride release), for temporary restorations, and in paediatric patients for occlusal restorations in primary teeth.
What is the classic pattern for intrinsic erosion?
Palatal cupping of maxillary anterior teeth, sometimes with occlusal cupping on posterior teeth. Suggests gastric acid exposure - reflux disease, chronic vomiting or an eating disorder. Refer for medical assessment.
How much operative dentistry is on the ADC Part 1?
Approximately 10% - about 28 of 280 questions.
Where do you actually stand?
30 questions weighted to the official ADC blueprint. Free, instant, no credit card.
Keep reading
Orthodontics for ADC Part 1: High-Yield Topics & Exam Traps
Orthodontics for ADC Part 1: occlusal classification, mixed dentition assessment, ADC-style example questions and when to intervene or refer.
Pharmacology for ADC Part 1: High-Yield Topics & Exam Traps
Dental pharmacology for ADC Part 1: Australian prescribing, ADC-style example questions, drug interactions and medical emergencies.
An 8-Week ADC Part 1 Study Plan That Actually Works
A week-by-week ADC written exam study plan for working dentists: diagnose weaknesses, master high-weight subjects, and rehearse full exam days.
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.