CerecⅡ型CAD/CAM全瓷冠的初步临床研究

The clinical study of the all-ceramic crowns by CAD/CAM technique

目的 探讨由SiemensCerecⅡ型CAD/CAM系统加工陶瓷内冠 ,经玻璃渗透和烤瓷工艺制成前磨牙全瓷冠与镍铬合金烤瓷冠的临床效果。方法 分别制作 6个全瓷冠和 6个镍铬合金烤瓷冠 ,比较修复体颜色、形态、基牙龋患率、边缘密合度、边缘着色、修复体折断情况、菌斑指数 (PI)和牙龈指数 (GI) ,随访 6个月至 1年。结果 CerecⅡ型CAD/CAM全瓷冠与金属烤瓷冠在外形基牙龋患率 ,修复体边缘密合度及折断情况 ,无统计学差异。全瓷冠在颜色 ,菌斑指数 (PI)和牙龈指数 (GI)方面优于镍铬合金烤瓷冠 (P <0 .0 1)。结论 与镍铬合金烤瓷冠相比 ,CerecⅡCAD/CAM全瓷冠颜色美观 ,近期修复效果良好 ,值得临床推广应用。

Objective To study the clinical effect of the vitreous infiltrated and porcelain fused to ceramics produced by CAD/CAM and to compare with the traditional porcelain fused to Ni-Cr PFM crown for premolar teeth.Methods Six all-ceramic crowns and six PFM crowns were fabricated and the clinical effects of all-ceramic crowns between PFM crowns were compared respectively.Results The all-ceramic crowns made by CAD/CAM technique was same as Ni-Cr PFM crowns in shape of prostheses,margin sealing second caries of abutments,and facture of prostheses、Plaque index(PI).The all-ceramic crown was better than Ni-Cr PFM crowns in color of prostheses Plaque index(PI) and gingival index(GI).Conclusion The effects of the all-ceramic crowns made by CAD/CAM technique are perfect in short time and they can be widely applied.