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Effects of conform, non-conform, and hybrid conformity toward stress distribution at the glenoid implant and cement: A finite element study.

Authors :
Abdul Wahab AH
Mohamad Azmi NA
Abdul Kadir MR
Md Saad AP
Source :
The International journal of artificial organs [Int J Artif Organs] 2022 Feb; Vol. 45 (2), pp. 200-206. Date of Electronic Publication: 2021 Mar 01.
Publication Year :
2022

Abstract

Glenoid conformity is one of the important aspects that could contribute to implant stability. However, the optimal conformity is still being debated among the researchers. Therefore, this study aims to analyze the stress distribution of the implant and cement in three types of conformity (conform, non-conform, and hybrid) in three load conditions (central, anterior, and posterior). Glenoid implant and cement were reconstructed using Solidwork software and a 3D model of scapula bone was done using MIMICS software. Constant load, 750 N, was applied at the central, anterior, and posterior region of the glenoid implant which represents average load for daily living activities for elder people, including, walking with a stick and standing up from a chair. The results showed that, during center load, an implant with dual conformity (hybrid) showed the best (Max Stress-3.93 MPa) and well-distributed stress as compared to other conformity (Non-conform-7.21 MPa, Conform-9.38 MPa). While, during eccentric load (anterior and posterior), high stress was located at the anterior and posterior region with respect to the load applied. Cement stress for non-conform and hybrid implant recorded less than 5 MPa, which indicates it had a very low risk to have cement microcracks, whilst, conform implant was exposed to microcrack of the cement. In conclusion, hybrid conformity showed a promising result that could compromise between conform and non-conform implant. However, further enhancement is required for hybrid implants when dealing with eccentric load (anterior and posterior).

Details

Language :
English
ISSN :
1724-6040
Volume :
45
Issue :
2
Database :
MEDLINE
Journal :
The International journal of artificial organs
Publication Type :
Academic Journal
Accession number :
33645338
Full Text :
https://doi.org/10.1177/0391398821999391