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- Title
The Effect of Platform Switching on Stress in Peri-implant Bone in a Condition of Marginal Bone Resorption: A Three-Dimensional Finite Element Analysis.
- Authors
Haibin Xia; Min Wang; Li Ma; Yi Zhou; Zhiyong Li; Yining Wang
- Abstract
Purpose: The aim of the present study was to investigate the stress distribution in the bone around a platform-switched implant with marginal bone loss. Materials and Methods: Finite element models of an implant-supported crown on a mandibular first molar were constructed and included an osseointegrated implant, a metal crown, and cancellous and cortical bone. Two kinds of abutments, conventional and platform-switched,were imported into the model. A variety of different levels of conical marginal bone resorption, from 0 to 2.0 mm in height and width, was created around the implant neck. The stresses generated in the peri-implant bone tissue were analyzed under 200 N of vertical or oblique loading. Results: The location of stress concentration extended from the implant neck toward the apex in association with increases in bone resorption depth. In the bone-resorbed models, the platform-switched implant showed lower maximum equivalent stresses in the peri-implant bone than the conventional abutment. The difference between the two implant models decreased as bone resorption increased. Conclusion: Within the limitations of this study, the results suggest a biomechanical advantage for platform switching in a condition of marginal bone resorption, but this advantage may be weakened when bone resorption is dramatic. Additional animal or clinical studies are necessary to better clarify the effects of peri-implant bone defects on the biomechanical features of a platform-switched configuration.
- Subjects
BIOLOGICAL models; BONE resorption; DENTAL crowns; DENTAL implants; MANDIBLE; MOLARS; RESEARCH funding; PHYSIOLOGIC strain; DATA analysis software; DESCRIPTIVE statistics
- Publication
International Journal of Oral & Maxillofacial Implants, 2013, Vol 28, Issue 3, pe122
- ISSN
0882-2786
- Publication type
Article
- DOI
10.11607/jomi.2965