微种植体植入初期稳定性:错颌上颌后牙区颊侧骨皮质厚度分析  

Primary stability of mini-screw: buccal cortical thickness in maxillary posterior area of malocclusion

作　　者：邹双双[1] 雷勇华[1] 张亚梅[1] 刘璐[1] 

机构地区：[1]中南大学湘雅医院口腔医学中心,湖南省长沙市410000

出　　处：《中国组织工程研究》2015年第12期1837-1841,共5页Chinese Journal of Tissue Engineering Research

基　　金：中南大学研究生自主创新项目(2013zzts305)~~

摘　　要：背景:研究表明植入部位牙槽骨骨皮质厚度是影响微种植体初期稳定性的重要因素,因此了解颌骨骨皮质厚度对选择微种植体植入部位和预测种植成功率十分重要。目的:探讨青少年安氏Ⅱ类Ⅰ分类错颌患者上颌后牙区颊侧骨皮质厚度分布规律。方法:获取52例青少年安氏Ⅱ类Ⅰ分类错颌患者锥形束CT影像资料,男女各26例,测量男、女两组上颌骨14-15间、15-16间、16-17间、24-25间、25-26间、26-27间距离牙槽嵴顶分别为2,4,6,8 mm水平的颊侧骨皮质厚度。结果与结论:1组内比较:在女性组中,左侧与右侧上颌后牙区根间颊侧骨皮质厚度比较差异无显著性意义(P>0.05),上颌5-6根间距离牙槽嵴顶2 mm水平处的颊侧皮质骨厚度低于距离牙槽嵴顶8 mm水平处(P<0.05),上颌6-7根间距离牙槽嵴顶2 mm水平处的颊侧皮质骨厚度低于距离牙槽嵴顶8 mm水平处(P<0.05),颊侧骨皮质厚度在同一根间位置表现出由牙槽嵴向根尖增厚的趋势,距离牙槽嵴顶8 mm水平处最大;在距离牙槽嵴顶8 mm水平处,上颌4-5根间骨皮质厚度低于6-7根间(P<0.05)。男性组与女性组表现相同。2组间比较:男性组与女性组对应位点的骨皮质厚度比较差异均无显著性意义(P>0.05)。表明青少年安氏Ⅱ类Ⅰ分类错颌上颌4-5、5-6、6-7根间距离牙槽嵴顶2,4,6,8 mm水平的双侧颊侧皮质骨厚度均可满足微种植钉植入要求;从第一前磨牙往牙弓后部移行,颊侧骨皮质骨厚度在各位点分布较均匀;上颌后牙区颊侧距离牙槽嵴顶6 mm以上的范围多靠近上颌窦,植入时避开此区,防止上颌窦穿通;颊侧骨皮质厚度由牙槽嵴顶向根尖方向逐渐增大,越靠近根方,厚度越大,植入时可以获得更好的初期稳定性。BACKGROUND：Mini-screw stability is primarily related to alveolar bone cortical thickness. It is necessary to learn cortical thickness to choose suitable implanting sites and predict success rate. OBJECTIVE：To evaluate the buccal cortical thickness in maxilary posterior area of Class II Division I malocclusion adolescents. METHODS： Fifty-two adolescents （including 26 male and 26 female） of Class II Division I malocclusion scanned by Cone Beam Computer Tomography were involved in this study. The buccal cortical thickness of six posterior interradicular sites （14-15, 15-16, 16-17, 24-25, 25-26, 26-27） at four bone levels （2, 4, 6, 8 mm） from the alveolar crest in both boys and girls were measured. RESULTS AND CONCLUSION： （1） There was no statisticaly significant difference in alveolar cortical thickness＆nbsp;between left and right sides in the girls （P 〉 0.05）; cortical thickness of 5-6 and 6-7 at 8 mm was thicker than that at 2 mm （P 0.05）. Al sites in this study were suitable for mini-screw implantation; from the first molar to posterior dental arch, buccal cortical thickness is wel-distributed; it is dangerous for implantation in the areas around the first molar more than 6 mm, where the frequent presence of the maxilary sinus is observed. There is an increase of buccal cortical thickness from crest to base of alveolar crest, obtaining good initial stability.

关 键 词：生物材料 口腔生物材料 安氏Ⅱ类Ⅰ分类错颌 微种植体 牙槽骨 骨皮质厚度 锥形束CT 

分 类 号：R318[医药卫生—生物医学工程]