Finite element analysis of porously punched prosthetic short stem virtually designed for simulative uncemented hip arthroplasty

Peng, M. J.-Q., Chen, H.-Y., Hu, Y., Ju, X. and Bai, B. (2017) Finite element analysis of porously punched prosthetic short stem virtually designed for simulative uncemented hip arthroplasty. BMC Musculoskeletal Disorders, 18, 295. (doi: 10.1186/s12891-017-1651-9) (PMID:28693543) (PMCID:PMC5504632)

Abstract

Background: There is no universal hip implant suitably fills all femoral types, whether prostheses of porous short-stem suitable for Hip Arthroplasty is to be measured scientifically. Methods: Ten specimens of femurs scanned by CT were input onto Mimics to rebuild 3D models; their *stl format dataset were imported into Geomagic-Studio for simulative osteotomy; the generated *.igs dataset were interacted by UG to fit solid models; the prosthesis were obtained by the same way from patients, and bored by punching bears designed by Pro-E virtually; cements between femora and prosthesis were extracted by deleting prosthesis; in HyperMesh, all compartments were assembled onto four artificial joint style as: (a) cemented long-stem prosthesis; (b) porous long-stem prosthesis; (c) cemented short-stem prosthesis; (d) porous short-stem prosthesis. Then, these numerical models of Finite Element Analysis were exported to AnSys for numerical solution. Results: Observed whatever from femur or prosthesis or combinational femora-prostheses, “Kruskal-Wallis” value p > 0.05 demonstrates that displacement of (d) ≈ (a) ≈ (b) ≈ (c) shows nothing different significantly by comparison with 600 N load. If stresses are tested upon prosthesis, (d) ≈ (a) ≈ (b) ≈ (c) is also displayed; if upon femora, (d) ≈ (a) ≈ (b) < (c) is suggested; if upon integral joint, (d) ≈ (a) < (b) < (c) is presented. Conclusions: Mechanically, these four sorts of artificial joint replacement are stabilized in quantity. Cemented short-stem prostheses present the biggest stress, while porous short-stem & cemented long-stem designs are equivalently better than porous long-stem prostheses and alternatives for femoral-head replacement. The preferred design of those two depends on clinical conditions. The cemented long-stem is favorable for inactive elders with osteoporosis, and porously punched cementless short-stem design is suitable for patients with osteoporosis, while the porously punched cementless short-stem is favorable for those with a cement allergy. Clinically, the strength of this study is to enable preoperative strategy to provide acute correction and decrease procedure time.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Ju, Dr Xiangyang
• Authors: Peng, M. J.-Q., Chen, H.-Y., Hu, Y., Ju, X., and Bai, B.
• College/School: College of Medical Veterinary and Life Sciences > School of Medicine, Dentistry & Nursing > Dental School
• Journal Name: BMC Musculoskeletal Disorders
• Publisher: BioMed Central
• ISSN: 1471-2474
• ISSN (Online): 1471-2474
• Copyright Holders: Copyright © 2017 The Authors
• First Published: First published in BMC Musculoskeletal Disorders 18: 295
• Publisher Policy: Reproduced under a Creative Commons license