van Dijken J W, Hörstedt P
Department of Cardiology, Dental School, Umeå University, Sweden.
J Dent. 1996 Nov;24(6):389-94. doi: 10.1016/0300-5712(95)00098-4.
The marginal fit of tooth-coloured inlays luted with composite resin luting materials has been considered to be the weak link of the inlays. The marginal breakdown of 5-year-old direct composite resin inlays was evaluated by scanning electron microscopy.
Replica impressions were made of the occlusal, axial-proximal and accessible cervical-proximal margins of 21 inlays and the marginal quality was quantified.
More than 84% of the total investigated length of the enamel/luting composite agent-luting composite/composite inlay interfaces revealed gap free margins. Proximal margins showed the largest breakdown at the enamel/composite resin interface, while the occlusal margin interfaces showed only a slight difference between the interfaces. The composite inlay and the luting composite resin showed a similar degree of wear in more than 50% of the evaluated marginal length. Medium gap width varied between 60 microns for the occlusal and axial-proximal and 87 microns for the cervical-proximal margins, with a range of 7.6-266 microns.
The direct composite inlays investigated showed good marginal integrity after 5 years in clinical service.
用复合树脂粘结材料粘结的牙齿颜色嵌体的边缘适合性一直被认为是嵌体的薄弱环节。通过扫描电子显微镜评估5岁直接复合树脂嵌体的边缘破坏情况。
对21个嵌体的咬合面、轴向近中面和可及的颈部近中边缘制作复制印模，并对边缘质量进行量化。
在牙釉质/粘结复合剂 - 粘结复合树脂/复合嵌体界面的总研究长度中，超过84%显示无间隙边缘。近中边缘在牙釉质/复合树脂界面处显示出最大的破坏，而咬合边缘界面在各界面之间仅显示出轻微差异。在超过50%的评估边缘长度中，复合嵌体和粘结复合树脂显示出相似程度的磨损。间隙宽度中等，咬合面和轴向近中面为60微米，颈部近中边缘为87微米，范围为7.6 - 266微米。
所研究的直接复合树脂嵌体在临床使用5年后显示出良好的边缘完整性。
