The effect of preparation procedure on implant-abutment joint stability.
- Author:
Jang Wook LEE
1
;
Chang Whe KIM
;
Kyung Soo JANG
;
Young Jun LIM
Author Information
1. Department of Prosthodontics, Graduate School, Seoul National University, Korea. k43c46w@snu.ac.kr
- Publication Type:Original Article
- Keywords:
Preparable abutment;
Initial de-torque value;
Final de-torque value;
Screw loosening;
Joint stability
- MeSH:
Joints*;
Torque
- From:The Journal of Korean Academy of Prosthodontics
2005;43(5):662-670
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
STATEMENT OF PROBLEM: Little is known about the effect of abutment preparation procedure on de-torque values in different implant platform and the relationship of final de-torque values with different implant platform size. PURPOSE: This study evaluated the effect of abutment preparation procedure on de-torque values in different implant platform and the relationship of final de-torque values with different implant platform size. MATERIAL AND METHOD: Six ITI implants (2 narrow-neck implants, 2 regular-neck implants, 2 wide-neck implants) and six Bra.nemark implants (2 narrow platforms, 2 regular platforms, 2 wide platforms) were embedded in each acrylic resin block with epoxy resin. Eighteen synOcta(R) abutments (6 narrow-neck implant-abutments, 6 regular-neck implant-abutments, 6 wide-neck implant-abutments) and eighteen esthetic abutments (6 narrow platform-abutments, 6 regular platform-abutments, 6 wide platform-abutments) were tightened to each implant with digital torque gauge. Initial de-torque values were measured using digital torque gauge. After preparation of abutments, Final de-torque values were measured with digital torque gauge. RESULTS AND CONCLUSION: 1. Screws loosening or abutments motion were not detected in all experimental group, but some scratches of implant-abutment joints were detected in all group. 2. Reduction ratios of final de-torque values were greater than initial de-torque values in all measured group, except in narrow-neck implant-abutment group (p<0.05). 3. Reduction ratios of final de-torque values in wide-neck implant-abutment group were greater than regular-neck implant-abutment group (p<0.01). 4. The greatest standard deviation value was detected in wide platform group in both implant systems.
