Related Experiment Videos
A comparison of three varieties of noncemented porous-coated hip replacement
R J Haddad1, S D Cook, M R Brinker
1Department of Orthopaedics, Tulane University School of Medicine, New Orleans, Louisiana 70112.
Insights
The LSF prosthesis demonstrated superior early outcomes in total hip replacements compared to AML and PCA designs. This implant design offered better initial stability and load transfer, reducing patient pain.
Area of Science:
- Orthopedic Surgery
- Biomaterials Engineering
- Medical Device Design
Background:
- Total hip replacement (THR) is a common procedure for hip osteoarthritis.
- Non-cemented, porous-coated prostheses aim for biological fixation and improved longevity.
- Variations in implant design may influence early clinical outcomes and patient satisfaction.
Purpose of the Study:
- To compare the early clinical and radiographic outcomes of three different non-cemented porous-coated total hip replacement prostheses.
- To evaluate the incidence of thigh or groin pain associated with each prosthesis type.
- To identify potential correlations between implant design features and early functional results.
Main Methods:
- Retrospective review of 134 primary non-cemented porous-coated total hip replacements in 125 patients.
- Inclusion of DePuy AML (64), Howmedica PCA (20), and Implant Technology LSF (50) prostheses.
- Assessment of pre-operative and post-operative Harris hip scores, along with clinical evaluation for pain.
Main Results:
- The LSF prostheses showed higher average post-operative Harris hip scores (91.5) compared to AML (80.7) and PCA (83.8).
- Incidence of thigh or groin pain was significantly lower in the LSF group (8%) versus AML (30%) and PCA (30%).
- Average follow-up periods were 36 months (AML), 40 months (PCA), and 24 months (LSF).
Conclusions:
- The Implant Technology LSF prosthesis exhibited better early clinical results compared to DePuy AML and Howmedica PCA.
- Improved initial stability and more physiological load transfer are likely contributors to the LSF prosthesis's superior performance.
- LSF implant design may offer advantages in reducing early postoperative complications like pain.
Abstract:
We reviewed 134 primary noncemented porous-coated total hip replacements in 125 patients: 64 were DePuy AML prostheses, 20 were Howmedica PCA and 50 were Implant Technology LSF. The prostheses had been in situ for an average of 36 months, 40 months and 24 months respectively. The average pre-operative Harris hip scores were 38.2 for AML, 33.2 for PCA, and 41.0 for the LSF prostheses. The average postoperative scores were 80.7 for AML, 83.8 for the PCA, and 91.5 for LSF. Thigh or groin pain associated with the prosthesis was present in 30% of AML, 30% PCA and 8% of the LSF cases. The clinical and radiographic review showed better early results with the LSF prostheses than the others; this seemed to be related to the implant design, which provided improved initial stability and more physiological transfer of load.