不同边缘设计椅旁CAD/CAM全瓷高嵌体修复的对比研究  

The comparative study of all-ceramic onlay restorations generated by chair-side CAD/CAM with different margin designs

作　　者：陈岗[1,2] 陈志飞[1,2] 顾卫平[1,2] 钟园[1,2] 

机构地区：[1]南京医科大学口腔疾病研究江苏省重点实验室 [2]南京医科大学附属口腔医院综合科,江苏南京210029

出　　处：《口腔医学》2015年第7期550-552,共3页Stomatology

基　　金：江苏高校优势学科建设工程资助项目(2014-37)

摘　　要：目的研究对接式和凹面肩台式边缘设计在椅旁CAD/CAM中的应用。方法将144颗临床根管治疗术后的患牙随机分为两组：A组行对接式CAD/CAM高嵌体修复,B组行凹面肩台式CAD/CAM高嵌体修复,分析其边缘密合性,牙体、修复体折裂和脱落情况。结果对接式边缘垂直间隙为（80.90±15.99）μm,凹面肩台式垂直间隙为（82.21±15.39）μm,两组间无统计学差异（P〉0.05）。6-12个月内随访,对接式和凹面肩台式高嵌体的修复体折裂率分别为0%和4.17%;两组牙体折裂率和修复体脱落率均为0%。结论对接式和凹面肩台式边缘在临床上均为高嵌体的可适设计形式,而对接式设计既利于牙体保存又更为简便、易用。Objective To explore the application of different margin designs（ edge to edge margin / concave shoulder margin） to chair-side computer-aided design / computer-aided manufacturing（ CAD / CAM）. Methods 144 teeth with root canal therapy were randomized into group A that used CAD / CAM with an edge to edge margin design or group B that used CAD / CAM with a concave shoulder margin design. The marginal adaptation,and the fracture and falling off rates of teeth and all-ceramic onlay restorations were evaluated.Results With no statistical significance（ P 〉0. 05）,the vertical marginal gap of group A was（ 80. 90 ± 15. 99） μm,and that of group B was（ 82. 21 ± 15. 39） μm. Followed up within 6 to 12 months,the fracture rate of restorations in group A and B was 0% and4. 17%,respectively. The falling off rate in both groups was 0%. Meanwhile,no teeth fell off or fractured in either group. Conclusions s Both the edge to edge margin and the concave shoulder margin are acceptable for CAD / CAM generated all-ceramic onlays,and the former is good for teeth and more convenient in clinic.

关 键 词：CAD/CAM 边缘设计 对接式边缘 凹面肩台式 全瓷高嵌体 

分 类 号：R783.3[医药卫生—口腔医学]