Influence of implant-abutment connection mode on stress distribution in peri-implant bone
10.3321/j.issn:1002-0098.2008.01.015
- VernacularTitle:种植体-基台连接形式对种植体周围骨组织应力分布的影响
- Author:
Xue-Jun LIU
1
;
Zhi-Yong LI
;
Hai-Bin XIA
Author Information
1. 武汉大学医学院
- Keywords:
Dental implantation;
Stress,mechanical;
Finite element analysis;
Implantabutment connection
- From:
Chinese Journal of Stomatology
2008;43(1):50-53
- CountryChina
- Language:Chinese
-
Abstract:
Objecfive To investigate the influence of butt joint connection and platform switching design of implant-abutment conneetion on the stress distribution in peri-implant bone. Methods Threedimensional finite element models of implant-supported mandibular first molar with different implantabutment connections were computed by COSMOSM 2.85. Traditional butt joint connection was used in model A and platform switching design in model B. Loading conditions were a vertical load of 200 N and inclined load of the same magnitude at 45 degrees to the vertical axis of the implant. Stress distribution in peri-implant bone and von Mises stresses at the same point of buccal and lingual implant-bone interfaces in two models were compared. Results Stresses concentrated in peri-implant cortical bone at the neck of implants on the buccal and lingual sides;maximum von Mises stresses under inclined load were higher than those under vertical load. Maximum von Mises stress in bone was 11.61 MPa in model A and 7.15 MPa in model B under vertical load,and 22.07 MPa in model A and 11.87 MPa in model B under inclined load rlesDectively. Von Mises stresses decreased as the distance from implant-abutment junction increased and the most obvious change occurred at the interface between cortical bone and spongy bone. Von Mises stresses at the same points of buccal and lingual implant-bone interfaces in model A were higher than those in model B.Conclusions Compared with butt joint connection,platform switching design improved the stress distribution and decrleased the maximum stresses in peri-implant bone around implant cervix.
