Fit analysis of CAD-CAM custom abutment using micro-CT.
10.4047/jkap.2016.54.4.370
- Author:
Gwang Seok MIN
1
;
Chae Heon CHUNG
;
Hee Jung KIM
Author Information
1. Department of Prosthodontics, School of Dentistry, Chosun University, Gwangju, Republic of Korea. khjdds@chosun.ac.kr
- Publication Type:Original Article
- Keywords:
CAD-CAM custom abutment;
Micro-CT;
Internal connection implant fixture;
Preloading reverse torque value;
Screw joint stability
- MeSH:
Computer-Aided Design*;
Joints;
Seoul;
Torque
- From:The Journal of Korean Academy of Prosthodontics
2016;54(4):370-378
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: The purpose of this study was to investigate screw joint stability and sagittal fit between internal connection implant fixtures of two different manufacturers and customized abutments. MATERIALS AND METHODS: Internal connection implant systems from two different manufacturers (Biomet 3i system, Astra Tech system) were selected for this study (n=24 for each implant system, total n=48). For 3i implant system, half of the implants were connected with Ti ready-made abutments and the other half implants were connected with Ti CAD-CAM custom ones of domestic-make (Myplant, Raphabio Co., Seoul, Korea) and were classified into Group 1 and Group 2 respectively. Astra implants were divided into Group 3 and Group 4 in the same way. Micro-CT sagittal imaging was performed for fit analysis of interfaces and preloading reverse torque values (RTV) were measured. RESULTS: In the contact length of fixture-abutment interface, there were no significant differences not only between Group 1 and Group 2 but also between Group 3 and Group 4 (Mann-Whitney test, P>.05). However, Group 2 and Group 4 showed higher contact length significantly than Group 1 and Group 3 in abutmentscrew interface as well as fixture-screw one (Mann-Whitney test, P<.05). In addition, RTV was lower in CAD-CAM custom abutments compared to ready-made ones (Student t-test, P<.05). CONCLUSION: It is considered that domestically manufactured CAD-CAM custom abutments have similar fit at the fixture abutment interface and it could be used clinically. However, RTV of CAD-CAM custom abutments should be improved for the increase of clinical application.
