预制基台与定制CAD/CAM基台螺钉松动的对比分析

Comparative Analysis of Screw Loosening With Prefabricated Abutments and Customized CAD/CAM Abutments.

作者信息

Paek Janghyun, Woo Yi-Hyung, Kim Hyeong-Seob, Pae Ahran, Noh Kwantae, Lee Hyeonjong, Kwon Kung-Rock

机构信息

*Assistant Professor, Department of Prosthodontics, School of Dentistry, KyungHee University, Seoul, South Korea. †Professor, Department of Prosthodontics, School of Dentistry, KyungHee University, Seoul, South Korea. ‡Associate Professor, Department of Prosthodontics, School of Dentistry, KyungHee University, Seoul, South Korea. §Clinical Instructor, Department of Prosthodontics, School of Dentistry, KyungHee University, Seoul, South Korea.

出版信息

Implant Dent. 2016 Dec;25(6):770-774. doi: 10.1097/ID.0000000000000481.

DOI:10.1097/ID.0000000000000481

PMID:27571352

Abstract

PURPOSE

The aim of this study was to determine the stability of computer-aided design and manufacturing (CAD/CAM) and prefabricated abutment by measuring removal torque before and after cyclic loading.

MATERIALS AND METHODS

Three types of fixture and 2 types of abutments were used. Removable torque was measured after cyclic loading for 5000 cycles between 25 and 250 N for each group. The same procedure was performed twice.

RESULTS

First, removal torque values (Newton centimeter) were measured for stock versus custom abutments as follows: group 1: 27.17 versus 26.67, group 2: 26.27 versus 26.33, and group 3: 37.33 versus 36.67. Second removal torque values (Newton centimeter) were also measured: group 1: 23 versus 23.5, group 2: 22.5 versus 22.33, and group 3: 32.67 versus 32.5. There was no significant difference between the stock and custom abutments in either the first or second removal torque values and also no significant difference among initial tightening torque, first or second removal torque (P > 0.05).

CONCLUSION

With precise control of CAD/CAM abutments, good screw joint stability can be achieved.

摘要

目的

本研究的目的是通过测量循环加载前后的拆除扭矩来确定计算机辅助设计与制造（CAD/CAM）基台和预制基台的稳定性。

材料与方法

使用了三种类型的种植体和两种类型的基台。每组在25至250 N之间进行5000次循环加载后测量拆除扭矩。相同步骤重复进行两次。

结果

首先，测量了成品基台与定制基台的拆除扭矩值（牛顿厘米）如下：第1组：27.17对26.67，第2组：26.27对26.33，第3组：37.33对36.67。其次，也测量了拆除扭矩值（牛顿厘米）：第1组：23对23.5，第2组：22.5对22.33，第3组：32.67对32.5。在首次或第二次拆除扭矩值方面，成品基台与定制基台之间无显著差异，初始拧紧扭矩、首次或第二次拆除扭矩之间也无显著差异（P>0.05）。