Influence of implant-abutment connection mode on stress distribution in peri-implant bone.
- Author:
Xue-jun LIU
1
;
Zhi-yong LI
;
Hai-bin XIA
Author Information
- Publication Type:Journal Article
- MeSH: Bone and Bones; physiology; physiopathology; Dental Abutments; Dental Implantation; Dental Implants; Finite Element Analysis; Models, Biological; Stress, Mechanical
- From: Chinese Journal of Stomatology 2008;43(1):50-53
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo investigate the influence of butt joint connection and platform switching design of implant-abutment connection on the stress distribution in peri-implant bone.
METHODSThree-dimensional finite element models of implant-supported mandibular first molar with different implant-abutment 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.
RESULTSStresses 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 respectively. 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.
CONCLUSIONSCompared with butt joint connection, platform switching design improved the stress distribution and decreased the maximum stresses in peri-implant bone around implant cervix.