Phase 1 Orthodontics (Interceptive Orthodontics)
Early orthodontic treatment to guide jaw growth and development during childhood.
What is Phase 1 Treatment?
Early orthodontic treatment performed while primary (baby) teeth and some permanent teeth are present, typically between ages 6–10. Also called interceptive or two-phase treatment.
What are the goals of Phase 1 treatment?
- •Guide jaw growth and development to reduce or correct skeletal problems (crossbites, severe crowding from lack of space, pronounced overbites or underbites)
- •Create room for erupting permanent teeth, improve bite function, and reduce risk of trauma to prominent front teeth
- •Simplify or shorten later comprehensive treatment (Phase 2) during adolescence; in some cases, Phase 2 may be avoided
What problems does Phase 1 treatment address?
- •Severe crowding or spacing that could impede eruption of permanent teeth
- •Crossbites (posterior or anterior) causing asymmetric jaw growth
- •Severe overjet (protruding front teeth) at risk for injury
- •Habits affecting development (thumb sucking, tongue thrust)
- •Early loss of baby teeth leading to space loss
Typical Appliances & Methods
Space maintainers and space retainers
Palatal expanders (rapid or slow maxillary expansion)
Partial braces on selected teeth
Functional appliances (e.g., Herbst, Twin Block)
Headgear (when appropriate)
Habit appliances (cribs, tongue bumpers)
How does Phase 1 treatment work?
Evaluation
Clinical exam, dental models/digital scans, X-rays (panoramic, cephalometric) and monitoring of growth.
Customized Plan
Appliance selection and timing based on growth patterns and the specific problem.
Active Phase 1 Treatment
Often 6–18 months depending on the issue.
Observation Period
Watchful waiting as more permanent teeth erupt.
Phase 2 (if needed)
Comprehensive full-arch braces or aligners placed once most permanent teeth are in, usually during early adolescence.
What are the benefits of Phase 1 treatment?
- •Can prevent worsening of serious problems and reduce need for extractions or orthognathic surgery later
- •Improves function, facial balance, and self-esteem earlier
- •May shorten and simplify later treatment
Important Considerations
- • Not every child needs Phase 1—careful assessment is required to avoid unnecessary treatment
- • Success depends on timing and growth; some issues require later comprehensive treatment regardless
- • Parental involvement and compliance (appliance wear, hygiene) are important
Who Should Be Evaluated?
Children around age 7 for an initial orthodontic check-up or earlier if there's visible concern (severe spacing, protrusion, crossbite, difficulty chewing, speech issues, or trauma risk).
Schedule an Early Evaluation
The American Association of Orthodontists recommends children have an orthodontic screening by age 7. Schedule a consultation to assess your child's development. Learn about the first visit process.