牙种植中数字化曲面断层与锥体束CT应用的对比  

Application of orthopantomography and cone beam computed tomography in dental implant:A comparative study

作　　者：张云龙[1] 李长福[1] 

机构地区：[1]天津医科大学口腔医院,天津市300070

出　　处：《中国组织工程研究》2012年第13期2332-2335,共4页Chinese Journal of Tissue Engineering Research

摘　　要：背景:影像学检查可及时了解牙种植位置信息,但目前常用的数字化颌骨曲面断层对判定骨的高度和宽度存在误差。目的:比较数字化曲面断层与锥体束CT在牙种植中的应用价值。方法:选取要求行种植治疗修复缺失牙,牙周状况良好,符合种植术适应证的患者53例(65颗),种植前以一直径为3mm的钢球为标记物置于患者待种植区,锥体束CT及普通数字化曲面断层分别测量三维重建图像及曲面断层片中标记物的直径,并与真实值进行比较,分析二者骨整合检出率差异。结果与结论:相比于数字化曲面断层,口腔种植前锥体束CT测量的小钢球直径与真实值差异较小(P<0.01)。种植后3个月,锥体束CT和普通数字化曲面断层得出的未发生骨结合的检出率接近(P>0.05)。说明与普通数字化曲面断层相比,锥体束CT可以更准确的评估种植前牙槽骨的骨量,并可在种植后检查中更清晰的反映种植体周围骨质情况。BACKGROUND：Imaging studies can get the information of dental implants timely.However,there are errors in the height and width of the bone when determined by commonly used orthopantomography（OPG）.OBJECTIVE：To compare the application of cone beam computed tomography（CBCT） and OPG in dental implants.METHODS：Fifty-three patients with missing teeth（n=65） and good periodontal status were assessed with CBCT and OPG before and after implant operation.Before operation,a steel ball with a diameter of 3 mm was fixed at the implanted area as a standard object for reference.Then,the diameter of the steel ball was measured by both CBCT and OPG.After operation,the rate of osseointegration was analyzed,and the difference was compared.RESULTS AND CONCLUSION：Compared with OPG,the difference between the real diameter and X-ray results by CBCT was smaller（P 0.05）.Three months later,the discovery rate of implant non-osseointegration measured by CBCT was similar to the result measured by OPG（P 0.05）.Compared with OPG,CBCT can evaluate the bone volume of pre-surgical alveolar bone more accurately,and can also indicate the peri-implant bone volume and quality much clearly.

关 键 词：锥体束CT 数字化曲面断层 三维重建 牙种植 骨整合 

分 类 号：R318[医药卫生—生物医学工程]