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Predictors of surgical-orthodontic treatment duration of unilateral impacted maxillary central incisors
Objectives:
To determine independent predictors of duration of surgical-orthodontic treatment of impacted maxillary central incisors.
Setting And Sample Population:
The Department of Dentistry at Show Chwan Hospital, Changhua, Taiwan. Eighty patients with unilateral osseous impacted maxillary central incisors receiving a surgical-orthodontic treatment.
Material And Methods:
This is a retrospective observational study. Treatment duration and its predictors were abstracted from the patients' charts and pre-treatment cephalometric radiographs. Predictors included demographics, crown angle, crown height, crown depth, and root dilacerations.
Results:
The mean age of the cohort was 9.2±2.3 years (6.4-20.6 years), and 60% were women. The mean orthodontic traction time was 8.0±4.5 months (2.0-24.1 months). Using multiple linear regression analysis, the independent predictors of treatment duration for an impacted maxillary central incisor were age (β=0.9, p<0.001), crown height (β=-0.2, p<0.05), and root dilacerations (β=3.8, p<0.001).
Conclusions:
Duration of surgical-orthodontic treatment of an impacted maxillary central incisor varied widely. Predictors of longer treatment time were older age, high impacted tooth, and dilacerated incisors.
