Methods: The sample consisted of 1 male and 10 females nongrowing patients (average age = 21.64 ± 1.91 years) who were diagnosed as Class I bimaxillary protrusion and underwent with four first premolars extraction. After leveled and aligned until completed on 0.016” X 0.022” stainless steel wire, the patients were treated with decortication and bone graft. Two weeks later, anterior teeth were retracted with T-loop until the space were closed. The bone dehiscence and fenestration were analyzed by cone beam computed tomography scans (CT) before (T0) and 6 months after retraction (T1). Wilcoxon Signed Rank test was used for statistical analysis.
Results: In all patients, incisors and canines retraction were completed. The bone dehiscence and fenestration decreased significantly at T1 (p < 0.001), whereas after retraction 6 months, bone dehiscence and fenestration disappeared 50.54% when compared with the bone dehiscence and fenestration at T0.
Conclusions:
The results of this study show that decortication-facilitated orthodontic treatment can be an effective alternative to reduce the bone dehiscence and fenestration after en-masse anterior teeth retraction in bimaxillary protrusion patients.