Dental Public Health
What this domain tests
This domain tests population-level thinking: how to measure oral health need, how to plan and evaluate a community programme, and how the Cambodian oral health system is organised.
Core rules
- Dental public health works through assessment, policy development and assurance. Individual treatment is not the tool; community-wide prevention, advocacy and service planning are.
- Need is measured with DMFT/dmft indices, plaque and gingival indices, and survey data; the WHO pathfinder approach is used for rapid sampling in countries with limited data.
- Cambodia's oral health burden is dominated by untreated caries and periodontal disease, with a small workforce relative to the population, so task shifting to mid-level providers and school-based prevention are central strategies. There is no nationwide water fluoridation, so fluoride toothpaste and topical fluoride programmes carry most of the preventive workload.
- Priority setting considers disease burden, intervention effectiveness, cost, equity and feasibility; the Ottawa Charter frames health promotion as healthy public policy, supportive environments, community action, personal skills and reoriented services.
- Programme evaluation uses structure, process and outcome measures, with baseline and follow-up surveys using the same diagnostic criteria.
Worked example
A provincial health department wants to reduce caries in 6–12-year-olds with a limited budget. Reasoning: the highest-value, lowest-cost option is daily fluoride toothpaste with supervised brushing plus school-based fluoride varnish or mouthrinse applied by trained teachers, combined with a sugar policy. Screening and referral are added, not substituted, because screening alone does not prevent disease. Outcomes measured would be dmft/DMFT change and the proportion of children with untreated caries.
Traps
Confusing public health with free treatment; using DMFT for primary teeth; evaluating a programme without baseline data; recommending water fluoridation where the infrastructure does not exist.