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Long-term stability of mandibular orthopedic repositioning
The Angle Orthodontist
|June 17, 1999
Summary
Mandibular anterior repositioning appliances aim to relieve TMJ pain and discomfort. However, orthodontic stabilization of this repositioning can lead to relapse as the jaw returns to its original position.
Area of Science:
- Dentistry
- Orthodontics
- Temporomandibular Joint Disorders
Background:
- Mandibular anterior repositioning appliances (MARA) are used to treat temporomandibular joint (TMJ) pain, noise, and myofascial discomfort.
- These appliances aim to improve TMJ function by altering condyle-disc relationships.
Observation:
- Orthodontic tooth movement was used to stabilize the mandible in an anteriorly repositioned position.
- The study observed the long-term effects of this stabilization on functional and muscular relationships.
Findings:
- The functional environment adapted, attempting to reestablish equilibrium.
- Complete relapse of the orthodontic treatment occurred as the condyles returned to their original posterior and superior position within the fossa.
Implications:
- Secondary stabilization of MARA via orthodontics may not provide lasting results.
- Relapse suggests that the jaw's natural adaptation can override arbitrary repositioning, impacting treatment outcomes.