Does the Additional Articulation in Retrieved Bipolar Hemiarthroplasty Implants Decrease Trunnionosis Compared to Total Hip Arthroplasty?
| Autor: | Brent A. Lanting, Christopher Del Balso, Sok Chuen Tan, James L. Howard, Matthew G. Teeter |
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| Rok vydání: | 2018 |
| Předmět: |
Adult
Male musculoskeletal diseases medicine.medical_specialty total hip arthroplasty bipolar hemiarthroplasty medicine.medical_treatment Arthroplasty Replacement Hip Dentistry Bipolar hemiarthroplasty Fretting Prosthesis Design Prosthesis 03 medical and health sciences Femoral head 0302 clinical medicine fretting Medicine and Health Sciences Medicine Humans Orthopedics and Sports Medicine 030212 general & internal medicine Femur Aged Retrospective Studies Aged 80 and over 030222 orthopedics corrosion business.industry Femur Head Middle Aged Surgery Prosthesis Failure Corrosion medicine.anatomical_structure Torque Metals Polyethylene trunnionosis Head length Female Hemiarthroplasty Hip Prosthesis business Implantation time Total hip arthroplasty |
| Zdroj: | Bone and Joint Institute |
| Popis: | Background Trunnionosis at the modular head-neck taper interface in metal-on-polyethylene total hip arthroplasty (MoP THA) has been shown to occur, and represents a potential mode of MoP THA failure. The purpose of the present investigation is to elucidate differences in fretting and corrosion at the head-neck taper interface of prostheses retrieved from bipolar hemiarthroplasty (BH) and MoP THA. Methods A retrieval analysis of BH and MoP THA prostheses featuring a single taper design from a single manufacturer and in vivo for a minimum 2 years was performed. Fifteen femoral heads of 28-mm diameter and corresponding femoral stems retrieved from BH were compared with MoP THA implants matched based on time in vivo and head length (28 mm, −3 mm to 28 mm, +8 mm). Fretting and corrosion damage scoring was completed under stereomicroscopic visualization. Results Femoral head bore tapers retrieved from BH exhibited decreased overall fretting (P = .02), when compared to those retrieved from MoP THA. Total corrosion scores for all retrieved implants were positively correlated with implantation time (ρ = 0.54, P Conclusion Femoral heads retrieved from BH exhibit decreased fretting damage compared to those retrieved from MoP THA. The added articulation in BH implants may decrease torque produced at the head-neck taper junction, thereby decreasing fretting. Increased fretting damage in implants from MoP THA is not associated with increased corrosion in 28-mm heads of this taper design. The longer a BH or MoP THA prosthesis is implanted, the greater the risk of damage due to corrosion. |
| Databáze: | OpenAIRE |
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