[TMJ and orthodontics, "past, present and future"]

Area of Science:

• Orthodontics and Dental Development
• Temporomandibular Joint (TMJ) Biology
• Craniofacial Growth and Function

Background:

• Historically, the temporomandibular joint (ATM) was primarily linked to mandibular condyle growth, with rodent studies demonstrating condylar cartilage's role in response to orthopedic appliances.
• Class II malocclusion treatments aimed at mandibular growth have yielded inconclusive results, especially with the advent of orthognathic surgery.

Framework:

• Current understanding emphasizes mechanical stimulation and function as primary shapers of the ATM during development, starting from infancy.
• Prevention of developmental dysplasias involves early behavioral guidance, encouraging mandibular propulsion through breastfeeding and a hard diet promoting alternating unilateral chewing.

Implementation:

• Addressing temporomandibular dysfunction (TMD) requires understanding its specific manifestations, particularly in adolescents, and its interaction with orthodontic treatments.
• Effective therapeutic strategies include behavioral counseling for susceptible individuals (e.g., hyperdivergent females with small condyles), precise condylar position control, and post-orthodontic occlusal adjustments.

Implications:

• Future orthodontic approaches for the TMJ hinge on robust prevention, early screening, and advanced knowledge of TMJ and TMD.
• Orthodontists can now identify at-risk patients, modify treatment plans accordingly, or ensure perfect treatment completion for optimal TMJ health.