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Relapse revisited
J L Vaden1, E F Harris, R L Gardner
1Center for the Health Sciences, University of Tennessee, Memphis, USA.
Summary
Long-term orthodontic treatment changes show minimal relapse after 6 years, with most changes resembling normal aging. Specialist treatment resulted in less irregularity than resident-treated cases.
Area of Science:
- Orthodontics
- Dental Research
- Longitudinal Studies
Background:
- Limited data exists on long-term orthodontic treatment outcomes beyond ten years.
- Understanding post-treatment dental stability is crucial for patient satisfaction and retention of results.
Purpose of the Study:
- To quantify changes in tooth relationships 6 and 15 years post-orthodontic treatment.
- To investigate factors influencing long-term orthodontic stability and relapse.
Main Methods:
- Retrospective analysis of 36 orthodontic cases.
- Assessment of tooth relationships at 6 and 15 years post-treatment.
- Correlation analysis with jaw growth patterns.
Main Results:
- The rate of change in tooth relationships decreased significantly over time.
- Most post-treatment changes were comparable to normal aging processes.
- Minor, significant associations found between incisor irregularity and parasagittal jaw growth, particularly when mandibular growth outpaced maxillary growth.
- Cases treated by a single specialist exhibited less relapse compared to those treated by multiple residents in university settings.
Conclusions:
- Orthodontic relapse primarily occurs early post-treatment, with later changes often attributable to aging.
- Parasagittal jaw growth dynamics can influence long-term incisor stability.
- Experienced specialist care may lead to superior long-term orthodontic treatment outcomes.