Fabrication of low-cost hip implant using direct metal laser sintering technique

Mohd Yusof Baharuddin

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Type :	article
Subject :	R Medicine (General)
Main Author :	Mohd Yusof Baharuddin
Additional Authors :	Ahmad Hafiz Zulkifly Lee, Ai Choo Siti Noor Azza Aminudin Lee, Muhammad Hisyam Sheikh Hussain Shaikh Salleh
Title :	Fabrication of low-cost hip implant using direct metal laser sintering technique

Place of Production :	Tanjong Malim
Publisher :	Fakulti Sains Sukan dan Kejurulatihan
Year of Publication :	2019
Corporate Name :	Universiti Pendidikan Sultan Idris

Abstract : Universiti Pendidikan Sultan Idris

Total hip replacement (THR) is the most popular surgery been performed in orthopedic surgery due to the inclination of musculoskeletal disorder and the aging population worldwide. However, the implant’s cost-burdened the patient, especially in the ASEAN region. The main objective of this study was to fabricate the low-cost hip implant using direct laser metal sintering (DMLS). The framework starts with the three dimensional of hip anthropometric datasets from computed tomography scanner, followed with the design of hip implant, computational analysis using finite element, and finally fabrication using DMLS technique. The morphological results demonstrated the value of neck-shaft angle was 130.46º, and the femoral head offset of 30.35 mm. The finite element analysis showed strain distribution was 65 MPa for the implant in metaphyseal region and 110 MPa for intact femur under staircase physiological loading which indicated inhibition of stress shielding at medical calcar region, and micromotion was 4.8 µm which prevent the formation of fibrous tissue and promoting osseointegration between implant-bone interfaces. This study proposed the fabrication using the DMLS technique, which produced accurate implant with low-cost, which suits the ASEAN hip morphology that prolongs implant lifetime

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