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The potential for bone loss in acetabular structures following THA
Journal article   Peer reviewed

The potential for bone loss in acetabular structures following THA

Michael T Manley, Kevin L Ong and Steven M Kurtz
Clinical orthopaedics and related research, v 453(453), pp 246-253
Dec 2006
DOI: https://doi.org/10.1097/01.blo.0000238855.54239.fd
PMID: 17006368
Featured in Collection :   UN Sustainable Development Goals @ Drexel

Abstract

Acetabulum - pathology Acetabulum - physiopathology Arthroplasty, Replacement, Hip - adverse effects Biocompatible Materials Biomechanical Phenomena Chromium Alloys Female Finite Element Analysis Hip Joint - physiopathology Hip Prosthesis - adverse effects Humans Imaging, Three-Dimensional In Vitro Techniques Ketones Middle Aged Osteolysis - etiology Osteolysis - physiopathology Polyethylene Glycols Polyethylenes Prosthesis Design Prosthesis Failure Stress, Mechanical Titanium
Attempts to preserve periacetabular bone stock following total hip replacement have largely ignored the potential for stress shielding in the acetabulum. We sought to quantify the change in stress distribution in acetabular bone with components of varying material stiffness by developing a high-resolution 3-D finite element model from CT scans of a young female donor. Periprosthetic bone stresses and strains on the left pelvis were compared with hemispherical cups of various material properties and with a horseshoe shaped polymeric design described in the recent literature. We observed unphysiologic periacetabular bone stress and strain fields for all designs tested. For hemispherical components, reduction of the acetabular shell material modulus caused modest changes in bone stress compared to the changes in implant geometry. The horseshoe shaped cup more effectively loaded the acetabular structures than the hemispherical design. Our results suggest stress and strain fields in pelvic structures after introduction of hemispherical acetabular components predict inevitable bone adaptation that can not be resolved by changes in implant material properties alone. Radical changes in implant design may be necessary for long-term maintenance of supporting structures in the reconstructed acetabulum.

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51 citations in Web of Science
57 citations in Scopus

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Collaboration types
Industry collaboration
Domestic collaboration
Web of Science research areas
Orthopedics
Surgery
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