不同粘接剂间隙对CAD/CAM嵌体边缘适应性的影响

Influence of different cement spaces on marginal adaptation of CAD/CAM inlay

目的探讨不同粘接剂间隙对CAD/CAM嵌体氧化锆粘接强度的影响。方法选取因正畸需要拔除的第一前磨牙30颗作为本研究对象,依照设置粘接剂间隙参数不同分为10μm(A组)、30μm(B组)、50μm(C组)制作嵌体;用轻体型硅橡胶复制边缘间隙,体视显微镜测量边缘间隙的厚度,使用SPSS13.0软件包对数据进行分析。结果所有瓷嵌体均可顺利就位,测量数据均小于120μm,A组肩台间隙明显低于B组及C组(P<0.05),且B组轴面显著低于C组(P<0.05)。结论在粘接间隙设定为10~50μm时,CEREC制作瓷嵌体均可取得满意效果。

Objective To explore the influence of different cement spaces on the marginal adaptation of CAD/CAM zirconia inlay.Methods30teeth extracted for orthodontic purpose were selected and divided into3groups(Group A10μm,Group B30μm,Group C50μm).The marginal spaces of inlays were recorded by the light?body Silicone impression material,and measured by microscope.The data were analyzed by SPSS13.0.Results All the inlays fitted very well and all the marginal spaces were less than120μm.The shoulder of Group A was statistically lower than Group B and Group C(P<0.05).The axial surface of Group B was statistically lower than Group C(P<0.05).Conclusion CEREC zirconia inlay is satisfactory when the cement space is between10-50μm.