拔牙掩饰性治疗骨性Ⅱ类错颌上前牙骨开窗及骨开裂的CBCT评价

Evaluation of effects of camouflaged orthodontic treatment on dehiscence and fenestration in skeletal classⅡmalocclusion patients by cone-beam computed tomography

目的通过对拔牙掩饰性治疗骨性Ⅱ类错颌上前牙唇侧骨量进行测量分析,评价其骨开窗和骨开裂的风险。方法对15名接受拔牙治疗的骨性Ⅱ类成人患者行锥形束CT扫描及三维重建,测量上前牙唇侧牙槽嵴顶距釉牙骨质界距离D和骨开窗高度F。结果术前D值为(1.61±0.75)mm,术后为(1.70±0.76)mm,术后D值略有增大,但两者差异无统计学意义(P>0.05);术前F值为(0.23±0.76)mm,术后为(0.023±0.14)mm,术后F值减小,两者差异也无统计学意义(P>0.05)。结论骨性Ⅱ类拔牙掩饰性治疗不会加重上前牙唇侧骨开窗及骨开裂的发生。

Objective The aim of this study was to assess the risk of dehiscence and fenestration of upper anterior teeth of the skeletal classⅡpatients with camouflage orthodontic treatment by the measurement of the labial bones.Methods Cone-beam computed tomography and 3D reconstruction were used for 15 adult patients of classⅡmalocclusion who accepted the camouflage treatment,and the distances between enamelocemental junction(D)and alveolar crest and the fenestration height(F)were measured respectively.Result The D valueincreased from 1.61±0.75 mm before the treatment to1.70±0.76 mm after the treatment.The F value decreased from 0.23±0.76 mm before the treatment to 0.023±0.14 mm after the treatment.However,there were no statistically significant differences between both groups(P>0.05).Conclusion Camouflage orthodontic treatment for the skeletal classⅡpatients will not worsen the dehiscence and fenestration of upper anterior teeth.