三种全瓷材料制作的髓腔固位冠边缘和内部适合性的体外研究  

Comparation of marginal and internal adaption of endocrowns made from three different ceramics in vitro

作　　者：曾百进[1] 何林姣 韩建民[2] 李媛[2] 林红[2] 高虹[1] 江青松[1] ZENG Bai-jin, HE Lin-jiao, HAN Jian-min, LI Yuan, LIN Hong, GAO Hong, JIANG Qing-song.(Department of Prosthodontics, Beijing Stomatology Hospital and School of Stomatology, Capital Medical University, Beijing 100050, Chin)

机构地区：[1]首都医科大学附属北京口腔医院修复科 [2]北京大学口腔医学院.口腔医院口腔材料研究室

出　　处：《口腔颌面修复学杂志》2017年第6期345-349,共5页Chinese Journal of Prosthodontics

基　　金：首都医科大学基础-临床合作项目(项目编号:17JL42);北京市科技计划-首都市民健康项目培育项目(项目编号:Z171100000417034)

摘　　要：目的:比较应用椅旁CAD/CAM技术,三种不同全瓷材料制作的髓腔固位冠边缘和内部适合性的差异,以期为临床全瓷材料的选择提供参考。方法:用钴铬合金制作一个髓腔固位冠基准模型,并复制出36个超硬石膏模型,随机分为3组,采用Cerec AC扫描获取光学模型并制作修复体,粘接后,包埋、切割,利用三维测量系统测量髓腔固位冠边缘及内部粘接剂厚度并进行统计学分析。结果:三种全瓷材料边缘粘接剂厚度均小于120μm,内部的粘接剂厚度均小于200μm。在边缘、轴牙合角和轴髓角处,Celtr a R Duo的粘接剂厚度(84.69±8.90μm,129.89±17.86μm,166.63±21.71μm)分别小于Cer ec block(107.36±8.98μm,161.13±19.35μm,198.86±11.56μm)和IPS e.max CAD(110.85±4.58μm,183.81±22.00μm,195.81±13.25μm),且差异具有统计学意义(P<0.05);而Cerec block和IPS e.max CAD之间差异无统计学意义;在其它测量位点三种材料的粘接剂厚度两两比较差异均无统计学意义。结论:基于本研究结果,应用椅旁CAD/CAM技术制作髓腔固位冠时,三种全瓷材料的边缘和内部适合性都能达到临床要求,Celtra R Duo的边缘和内部适合性优于IPS e.max CAD和Cer ec block。Objective： To compare marginal and internal adaption of prostheses manufactured from three different ceram- ics with a chairside CAM/CAM system and provide experimental evidence for their clinical application. Methods： A basic preparation of endocrown was made of cobalt-chromium alloy and 36 impressions were taken and poured with die-stone. 36 models were randomly divided into 3 groups （n=12）. The models were scanned and the protheses were fabricated with Cerec AC. The protheses were cemented to the models with resin cement and embedded with self-cure resin, and then cut with a cutting machine. The thickness of adhesive between prothesis and the die were measured with Smartscrope MVP 2000. Results： The thickness of adhesives at marginal sites of all three ceramics was smaller than 120μm, and that of inter- nal measuring sites was all smaller than 2001xm. At the marginal, axial-occlusal comer and axial-pulpal comer sites, the thickness of adhesive of CeltraDuo （84.69±8.90μm, 129.89±17.86μm, 166.63±21.71μm） was smaller than Cerec block （107.36±8.98μm, 161.13± 19.35μm, 198.86± 11.56μm） and IPS e.max CAD （110.85±4.58μm, 183.81±22.00μm, 195.81 ±13.25 μm） respectively, and there was a significant difference between them （P〈 0.05）, however, the difference be-tween Cerec block and IPS e.max CAD was not significant. At all the other measuring sites, there were no statistical differ- ences among Celtra~ Duo, Cerec block and IPS e.max CAD. Conclusions： All these three ceramics could meet the clinical requirements. Celtra Duo shows better than IPS e.max CAD and Cerec block in marginal and internal adaption of en- docrowns fabricated by a chairside CAM/CAM system.

关 键 词：髓腔固位冠 适合性 全瓷材料 

分 类 号：R783.1[医药卫生—口腔医学]