The initial stability and contact mechanics of a press-fit resurfacing arthroplasty of the hip
- 1 April 2007
- journal article
- research article
- Published by British Editorial Society of Bone & Joint Surgery in The Journal of Bone and Joint Surgery. British volume
- Vol. 89 (4), 549-556
- https://doi.org/10.1302/0301-620x.89b4.18055
Abstract
Finite element analysis was used to examine the initial stability after hip resurfacing and the effect of the procedure on the contact mechanics at the articulating surfaces. Models were created with the components positioned anatomically and loaded physiologically through major muscle forces. Total micromovement of less than 10 μm was predicted for the press-fit acetabular components models, much below the 50 μm limit required to encourage osseointegration. Relatively high compressive acetabular and contact stresses were observed in these models. The press-fit procedure showed a moderate influence on the contact mechanics at the bearing surfaces, but produced marked deformation of the acetabular components. No edge contact was predicted for the acetabular components studied. It is concluded that the frictional compressive stresses generated by the 1 mm to 2 mm interference-fit acetabular components, together with the minimal micromovement, would provide adequate stability for the implant, at least in the immediate post-operative situation.Keywords
This publication has 56 references indexed in Scilit:
- The Evolution of Hip Resurfacing ArthroplastyOrthopedic Clinics of North America, 2005
- Early results of primary Birmingham hip resurfacingsThe Journal of Bone and Joint Surgery. British volume, 2005
- Stability of the Birmingham hip resurfacing arthroplasty at two yearsThe Journal of Bone and Joint Surgery. British volume, 2005
- Birmingham hip resurfacing arthroplastyThe Journal of Bone and Joint Surgery. British volume, 2005
- Metal-on-metal resurfacing of the hip in patients under the age of 55 years with osteoarthritisThe Journal of Bone and Joint Surgery. British volume, 2004
- Preservation of the bone mineral density of the femur after surface replacement of the hipThe Journal of Bone and Joint Surgery. British volume, 2004
- Metal-on-Metal Hybrid Surface Arthroplasty: Two to Six-Year Follow-up StudyJournal of Bone and Joint Surgery, 2004
- The relationship between cup design and the radiological signs of aseptic loosening in total hip arthroplasty.The Journal of Bone and Joint Surgery. British volume, 2003
- Evolution and future of surface replacement of the hipJournal of Orthopaedic Science, 1998
- Metal on Metal Surface Replacement of the HipClinical Orthopaedics and Related Research, 1996