Related Experiment Videos
A long-term cephalometric evaluation of treated Class II division 2 malocclusions
S K Binda1, A M Kuijpers-Jagtman, J K Maertens
1Department of Orthodontics, University of Nijmegen, The Netherlands.
European Journal of Orthodontics
|August 1, 1994
Summary
Post-orthodontic treatment, Class II division 2 malocclusions show significant skeletal and dental changes, with males and younger patients exhibiting more pronounced long-term shifts. Mandibular growth and incisor relapse were observed.
Area of Science:
- Orthodontics and Dentofacial Orthopedics
- Cephalometric Analysis
- Growth and Development
Background:
- Class II division 2 malocclusions present unique challenges in orthodontic treatment.
- Understanding post-retention changes is crucial for long-term treatment stability.
- Longitudinal cephalometric data provides insight into evolving facial structures.
Purpose of the Study:
- To evaluate long-term skeletal, dental, and soft-tissue changes after orthodontic treatment for Class II division 2 malocclusions.
- To identify factors influencing post-retention changes, including sex and age.
- To analyze the stability of orthodontic correction over five years.
Main Methods:
- Retrospective analysis of lateral cephalograms from 81 patients with Class II division 2 malocclusions.
- Data collected at four time points: pre-treatment (T00), post-retention (T0), 2 years post-retention (T2), and 5 years post-retention (T5).
- Two-way ANOVA used to assess the influence of sex and age on changes over time.
Main Results:
- Significant sex and age influences on changes were observed, particularly during treatment and up to five years post-retention.
- Males exhibited more pronounced changes over time compared to females.
- Growth contributed to increased sagittal and vertical dimensions, with a reduction in the skeletal Class II pattern during treatment. Post-retention, a tendency for anterior mandibular rotation was noted. Incisor torque and overbite showed some relapse, while the interincisal angle increased.
- Soft tissues demonstrated growth during treatment, with minimal changes afterward. The nose and chin became more prominent due to growth.
Conclusions:
- Orthodontic treatment effectively reduces the skeletal Class II pattern and modifies incisor positions in Class II division 2 malocclusions.
- Post-retention changes, including some incisor relapse and anterior mandibular rotation, occur, influenced by sex and age.
- Long-term stability is influenced by residual growth, necessitating careful monitoring, especially in males and younger individuals.