Orthodontics and Pediatric Dentistry
What the exam tests
This domain tests growth and development, mixed-dentition management, interceptive orthodontics and child behavior and caries management. The exam favors timing decisions that respect growth and avoid irreversible treatment too early.
Core rules and concepts
- Development: know eruption timing and the leeway space; preserve arch length when primary teeth are lost early with a space maintainer.
- Class II: a large overjet with a deep bite needs early assessment for trauma risk; functional appliances or headgear may be used in growing patients, but two-phase treatment should have a clear goal.
- Class III: early referral is important for severe skeletal cases; do not attempt camouflage that worsens with growth.
- Impacted canines: use clinical and radiographic localization; intercept when possible and coordinate surgical exposure with orthodontic traction.
- Pediatric caries: early childhood caries is preventable; use fluoride varnish, sealants, diet counseling and minimally invasive restorations such as the Hall technique where appropriate.
- MIH: distinguish molar–incisor hypomineralization from caries; desensitize and seal, and avoid repeated unrestored breakdown.
- Behavior management: use tell–show–do, positive reinforcement and appropriate local anesthesia; restraint is a last resort and requires justification.
Worked example
A 9-year-old has a Class II division 1 malocclusion, 10 mm overjet and a deep bite. Reasoning: the overjet creates trauma risk, so early intervention is justified. A functional appliance can be considered during the growth spurt, with definitive fixed appliances later; document the skeletal and dental goals before starting.
Traps
Extracting permanent teeth too early; missing MIH and treating it as caries; failing to place a space maintainer after early primary molar loss; ignoring habits or airway problems; promising a single-phase result in a growing patient.