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- 2018
正畸患者上颌侧切牙和尖牙区骨缺损影响因素的锥形束CT研究
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Abstract:
摘要 目的: 利用锥形束CT(cone beam computed tomography,CBCT)研究上颌侧切牙和尖牙区骨开裂和骨开窗的危险因素。方法: 实验对象选自2014~2016年就诊于中国医科大学附属口腔医院正畸一科患者治疗前的CBCT,存在骨开裂或骨开窗的上颌侧切牙44例和上颌尖牙43例为实验组,不存在骨开裂和骨开窗的上颌侧切牙43例和上颌尖牙41例为对照组。结果: 牙体倾斜度、牙体长轴与牙槽突长轴的角度、牙槽骨曲度、牙槽骨宽度、牙根宽度与牙槽骨宽度差、牙齿在牙槽骨中的位置有统计学差异(P<0.05),牙根长度、根尖距牙槽骨最凹点的距离无统计学差异(P>0.05)。结论: 牙齿舌倾、牙体长轴与牙槽突长轴角度大、牙槽骨薄、牙槽骨弯曲大、牙齿位置偏离牙槽骨中心(偏唇侧或舌侧)等是上颌侧切牙和尖牙区发生骨开裂与骨开窗的危险因素
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