牙槽突裂植骨术后的植骨效果评价

目的通过牙CT的扫描及Matlab7.0软件的应用，评价牙槽突裂植骨术后的骨缺损区的体积变化。方法选取11名单侧完全性牙槽突裂患者，应用牙CT扫描及Matlab7.0软件计算植骨前和植骨后3个月的牙槽突裂空隙体积和所植入骨的体积，并计算术前后体积比值。结果植骨术后骨桥的体积与植骨前牙槽突裂隙的体积比值，最大值可达114.99%，最小值仅有13.36%，平均数为71.80%，变异系数为47.987。结论植骨后存活的骨桥体积变化较大。

Evaluation of bone volume of alveolar cleft before and after bone graft

Objective The aim of this study was to evaluate the changing of alveolar cleft bone volume before and after bone graft.Methods 11 complete unilateral alveolar cleft patients were scanned with dental CT before bone graft surgery and 3 months after surgery.Matlab7.0 software was used to calculate the bone volume of alveolar cleft before bone graft and bone bridge volume after bone graft.The method was clockwise identify the irregular area of alveolar cleft by several points at different vertical level,then calculated the irregular area of alveolar cleft and the volume of alveolar cleft using Matlab7.0 software.The volume of implant bone was evaluated with same method after 3 months surgery.The ratio of graft bone bridge volume and alveolar cleft volume was calculated.Results The maximum ratio of bone bridge volume and alveolar cleft volume was 114.99%,the minimum ratio was 13.36%.The average ratio was 71.80%,coefficient variation was 47.987.Conclusion Bone bridge volume after bone graft is varying.