Dental Public Health
What the exam expects
This domain tests epidemiology, prevention at the population level, oral health promotion, access to care, and program planning and evaluation. Expect definitions, measures, and study-design interpretation.
Core concepts to master
- Epidemiology: incidence vs prevalence, sensitivity and specificity, positive and negative predictive value, and the effect of prevalence on predictive values.
- Study designs: cross-sectional, case-control, cohort, and randomized trials, with their strengths and biases.
- Measures: DMFT/dmft, community periodontal index, and caries prevalence reporting.
- Prevention: water fluoridation, fluoride toothpaste, sealants, and screening programs.
- Program planning: needs assessment, objectives, implementation, and evaluation; access and equity issues.
Traps
- Confusing incidence (new cases over time) with prevalence (all cases at a point).
- Assuming a highly sensitive test is also highly predictive; predictive value depends on prevalence.
- Treating DMFT as a measure of severity rather than a count that mixes treated and untreated disease.
- Confusing efficacy (ideal conditions) with effectiveness (real-world conditions).
Rule of thumb
For screening questions, use SnNout and SpPin: a highly Sensitive test, when Negative, rules out; a highly Specific test, when Positive, rules in. Worked example: a screening test with 95% sensitivity in a low-prevalence population will have many false positives, so its positive predictive value is low despite good sensitivity - the correct answer addresses prevalence, not test accuracy.
Ethics and Jurisprudence
What the exam expects
This domain tests professional ethics, informed consent, confidentiality, record keeping, scope of practice, and legal duties. Items are often scenario-based, asking for the most appropriate action rather than the legally permissible minimum.
Core concepts to master
- Informed consent: capacity, voluntariness, disclosure of material risks, alternatives, and consequences of refusal; consent for minors and guardians.
- Confidentiality: exceptions (risk of harm, legal reporting, court order), and handling of records and third-party requests.
- Professional boundaries: dual relationships, impaired colleagues, and reporting obligations.
- Scope of practice and supervision: what may be delegated and at what level of supervision.
- Records: accuracy, retention, amendment, and release; the record as a legal document.
Traps
- Treating a signed form as sufficient consent when the discussion never occurred.
- Disclosing information to a family member without patient authorization.
- Assuming that because an action is legal it is ethical; the exam often wants the higher standard.
- Failing to report an impaired colleague because of loyalty; reporting is generally required.
Rule of thumb
When two answers are both legal, choose the one that protects the patient's autonomy and welfare and documents the reasoning. Worked example: a competent adult refuses a necessary extraction after full explanation - the correct answer is to respect the refusal, document the discussion and alternatives, and arrange follow-up, not to proceed or to dismiss the patient punitively.