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[Changes in clinical crown length during multiband treatment].
Fortschritte Der Kieferorthopadie
|October 1, 1989
Summary
Adolescent orthodontic treatment with fixed appliances can increase clinical crown length. Extrusive mechanics accelerate this growth, while intrusive mechanics slow it, with no appliance type influencing the outcome.
Area of Science:
- Dentistry
- Orthodontics
- Craniofacial Growth
Background:
- Adolescent dental development involves natural changes in tooth morphology.
- Orthodontic treatment aims to correct malocclusions and improve dental aesthetics.
- Understanding crown length changes during treatment is crucial for predicting outcomes.
Purpose of the Study:
- To investigate changes in clinical crown length during orthodontic treatment in adolescents.
- To compare crown length changes with physiological growth and different orthodontic mechanics.
- To determine the influence of treatment duration and objectives on crown length alteration.
Main Methods:
- Measurement of clinical crown lengths on dental casts before and after treatment in 50 adolescents.
- Comparison of initial crown lengths with a younger control group.
- Statistical analysis using t-tests and correlation analysis to assess significance and relationships.
Main Results:
- Clinical crown length increases physiologically in adolescents (approx. 0.175 mm/year).
- Fixed appliance therapy leads to increased clinical crown length in adolescents.
- Extrusive mechanics significantly accelerated crown lengthening, while intrusive mechanics reduced it.
Conclusions:
- Orthodontic treatment, particularly with extrusive mechanics, can enhance clinical crown lengthening in adolescents.
- Intrusive mechanics counteract crown lengthening during orthodontic therapy.
- The type of fixed appliance used does not appear to influence the rate of clinical crown length change.