期刊
DENTAL MATERIALS JOURNAL
卷 28, 期 4, 页码 373-381出版社
JAPANESE SOC DENTAL MATERIALS DEVICES
DOI: 10.4012/dmj.28.373
关键词
Screw loosening; Preload; Abutment screw
资金
- Sato Fund of Nihon University School of Dentistry
- Japan Society for the Promotion of Science [17592047, 19592263]
- Promotion and Mutual Aid Corporation for Private School of Japan
- Grants-in-Aid for Scientific Research [19592263, 17592047] Funding Source: KAKEN
To date, there is no evidence that internal anti-rotation configurations are better than external ones. The purpose of this study was to evaluate the effect of eccentric cyclic loading on abutment screw loosening in internal and external hexagon implants with either of these two screw materials, titanium (Ti) alloy versus gold alloy. The reverse torque value of the abutment screw was measured before (initial preload) and after loading (post-loading). The prepared assemblies were divided into four groups (A to D). Groups A and B used internal hex implants with gold alloy and Ti alloy abutment screws respectively. Groups C and D used external hex implants with gold alloy and Ti alloy abutment screws respectively. In all the groups, post-loading preload was significantly (p<0.05) higher than initial preload. Further, two-way ANOVA indicated that the implant-abutment connection did not have an effect, but the abutment screw material did. In particular, Ti abutment screws were less likely to come loose.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据