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Updated: May 8, 2026
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Measuring Maxillary Posterior Tooth Movement: A Model Assessment using Palatal and Dental Superimposition
Published on: February 23, 2024
Long-term stability: postretention changes of the mandibular anterior teeth
Scott A Myser1, Phillip M Campbell, Jim Boley
1Orthodontic Department, Baylor College of Dentistry, Texas A&M Health Science Center, Dallas, TX, USA.
Summary
Orthodontic treatment for mandibular anterior malalignment is generally stable. Narrower arch forms and interproximal restorations after treatment are key risk factors for posttreatment malalignment.
Area of Science:
- Orthodontics
- Dental Research
Background:
- Mandibular anterior malalignment is a common orthodontic concern.
- Long-term stability of corrected malalignment is crucial for treatment success.
Purpose of the Study:
- To evaluate long-term posttreatment changes in orthodontically corrected mandibular anterior malalignment.
- To identify factors contributing to these posttreatment changes.
Main Methods:
- Longitudinal study of 66 subjects (mean age 15.4 years).
- Models and cephalograms analyzed for malalignment and growth changes.
- Follow-up period of 15.6 years posttreatment.
Main Results:
- Small average increases in crowding and irregularity observed postretention.
- Narrower arch forms, posttreatment interproximal restorations, and prior extractions were associated with greater malalignment.
- Growth and interarch variables did not significantly relate to malalignment.
Conclusions:
- Orthodontic treatment for mandibular anterior malalignment is not inherently unstable.
- Narrow arch forms and interproximal restorations are identified as potential risk factors for postretention malalignment.
