平台转移设计对犬种植体颈部骨组织影响的影像学分析  

Influence of platform switching on crest bone maintenance around implants: A radiographic investigation in dogs

作　　者：徐昊[1] 赵保东[1] 时艳[1] 王维英[1] 刘淑娇[1] 肖菲[1] 

机构地区：[1]青岛大学医学院附属医院口腔科,山东青岛266003

出　　处：《上海口腔医学》2012年第1期41-47,共7页Shanghai Journal of Stomatology

摘　　要：目的:比较平台转移设计种植体与传统对接连接种植体在功能负重与非功能负重状态下种植体颈部骨组织的动态变化,细化平台转移设计对种植体颈部骨组织的影响因素。方法:将6只犬随机编为1～6号,拔除双侧下颌第二、三、四前磨牙,3个月后按设计顺序植入Ankylos、GS-Ⅱ、US-Ⅱ种植体共36颗。术后3个月时行二期手术,4个月时右侧取模,4.5个月时戴冠,12个月时处死动物。植入即刻、第3、6、9、12个月时摄片。测量肩台—骨结合冠方最高点(IS-CLB)、肩台—颈部牙槽嵴顶(IS-BC)距离。根据所用种植体的不同分为A、G、U 3组,采用SPSS11.5软件包对数据进行统计学分析。结果:A、G组负重侧与非负重侧的IS-CLB、IS-BC在种植术后第6、9、12个月时与U组比较,均有显著性差异,A、G组间无差异。各组自身负重侧与非负重侧比较,均无差异。各组自身比较,种植即刻与3个月时无显著差异,3个月与6个月、6个月与9个月、9个月与12个月时比较,均有显著性差异。结论:潜入式种植体颈部骨组织的显著性变化始于种植二期术后。种植体植入并行使功能12个月,颈部骨组织的吸收与功能负重无关。PURPOSE：To evaluate and compare the dynamic changes in functional loading or non-functional loading with platform-switching（PLS） implants and butt-joint implants,and to refine the factors leading to marginal bone loss around PLS.METHODS：Six adult dogs were selected and numbered randomly.The second,third and fourth premolars in bilateral mandible of each dog were extracted.After 3 months,the implantation operation was carried out.There were 3 kinds of implants,36 implants in total,which were divided in to 3 groups： Group A,Group G and Group U.In particular order,A,G and U were placed on each side of every dog.Three months later,the 2nd surgery was begun.At the 4th month from the 1st surgery,for each dog,on the right side only,the abutments were installed and impression was taken.Then,after 2 weeks,the dental prostheses were put on.All dogs were executed at the end of the 12th month.X-ray film was taken at the 3rd,6th,9th and 12th month and the moment of the 1st surgery（baseline）.Measurements were made between the implant shoulder（IS）,the most coronal level of bone in contact with implant（CLB）,and the level of alveolar bone crest（BC）.According to the different groups of implants（A,G,U）,all records were analyzed with paired and Wilcoxon＇s signed rank test using SPSS11.5 software package.RESULTS：The mean IS-CLB and IS-BC values of group A,G were significantly different with those of group U at the 6th,9th and 12th month,while there was no significant difference between group A and G.No matter they were loading or not,the self-comparison of each kind of implant presented no significant difference.There was no significant difference between every kind of implant on their self-comparison during the first three months;while,the differences were significant during the next 9 months.CONCLUSIONS： The most significant changes in the absorption of marginal bone around two stage submerged implant can be observed after 3 months of implanting.The bone absorption was not related to functional l

关 键 词：种植体 平台转移 骨吸收 功能负重 影像学 

分 类 号：R783.6[医药卫生—口腔医学]