Wear Rates of Larger-Diameter Cross-Linked Polyethylene at 5 to 13 Years: Does Liner Thickness or Component Position Matter?
| Autor: | Thomas P. Schmalzried, Andrew K. Battenberg, Jonathan G. Haw, Der-Chen T. Huang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Adult
Male musculoskeletal diseases medicine.medical_specialty Osteolysis Arthroplasty Replacement Hip Radiography Prosthesis Design law.invention 03 medical and health sciences 0302 clinical medicine law medicine Humans Orthopedics and Sports Medicine 030212 general & internal medicine Aged Aged 80 and over Orthodontics 030222 orthopedics Bearing (mechanical) Cross-linked polyethylene business.industry Significant difference Mechanical failure Acetabulum Middle Aged equipment and supplies medicine.disease Prosthesis Failure Surgery Volumetric wear Polyethylene Female Hip Prosthesis Bone Diseases business Cartilage Diseases Follow-Up Studies Total hip arthroplasty |
| Zdroj: | The Journal of Arthroplasty. 32:1381-1386 |
| ISSN: | 0883-5403 |
| DOI: | 10.1016/j.arth.2016.11.022 |
| Popis: | Background Cross-linked polyethylene (XLPE) has demonstrated significantly reduced wear and osteolysis into the second decade for total hip arthroplasty. There is a relative paucity of data with ≥36-mm bearings. Issues include potential effects of reduced liner thickness and component position on wear, osteolysis, and mechanical failure of the bearing. Methods Radiographs of 48 primary total hip arthroplasties with ≥36-mm modular XLPE bearings were analyzed at a minimum 5 years postoperative on serial radiographs using a validated, edge-detection-based algorithm. Subgroups were examined to assess the effect of bearing diameter, liner thickness, acetabular abduction angle, and acetabular anteversion on XLPE wear. Results There was no significant difference in volumetric wear when subgroups were stratified by component factors: liner thickness ( 3 /y vs 24.47 mm 3 /y, respectively ( P = .315); acetabular component abduction angle ( 3 /y vs 27.8 mm 3 /y, respectively ( P = .522); acetabular anteversion ( 3 /y vs 31.79 mm 3 /y, respectively ( P = .521). There were no dislocations, mechanical failures, or revisions. There were 7 hips with volumetric wear rates ≥80 mm 3 /y; 1 had possible osteolysis. Conclusion Larger-diameter XLPE wear was not measurably affected by liner thickness, acetabular abduction angle, or acetabular anteversion. However, there is a trend for increasing volumetric wear with increasing bearing size. Wear outliers do occur, and continued follow-up of larger-diameter XLPE bearings is warranted. |
| Databáze: | OpenAIRE |
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