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Open bite as a risk factor for orthodontic root resorption
Masahide Motokawa1, Akiko Terao, Masato Kaku
1Department of Orthodontics, Applied Life Sciences, Hiroshima University Institute of Biomedical & Health Sciences, Japan and.
European Journal of Orthodontics
|January 12, 2013
Summary
Open bite patients undergoing orthodontic treatment experience significantly more root resorption. Hypofunctional teeth in open bite cases are particularly susceptible to root resorption and abnormal root shapes.
Area of Science:
- Orthodontics
- Dental Radiology
- Periodontology
Background:
- Orthodontic treatment can induce root resorption.
- Open bite malocclusion presents unique challenges in orthodontic management.
- Understanding factors influencing root resorption is crucial for treatment planning.
Purpose of the Study:
- To determine the prevalence and severity of orthodontic root resorption in patients with and without open bite.
- To compare root resorption between functional and hypofunctional teeth within the open bite group.
- To identify clinical variables associated with increased root resorption.
Main Methods:
- Retrospective study of 111 patients treated with multibracket appliances.
- Classification of root resorption and root shape severity using periapical radiographs.
- Division of patients into non-open bite (NOB) and open bite (OB) groups.
- Sub-division of OB group teeth into functional and hypofunctional categories.
Main Results:
- Open bite (OB) patients showed significantly higher prevalence and degree of root resorption compared to non-open bite (NOB) patients.
- Anterior and premolar teeth were particularly affected in the OB group.
- Hypofunctional teeth within the OB group exhibited greater root resorption and abnormal root shapes than functional teeth.
- Abnormal root shape and bite type were significant predictors of root resorption.
Conclusions:
- Open bite malocclusion is a significant risk factor for increased orthodontic root resorption.
- Hypofunctional teeth in open bite patients are more prone to root resorption and morphological changes.
- Abnormal root shape is associated with a higher incidence of root resorption during orthodontic treatment.
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