Fixed-Bearing Unicompartmental Knee Arthroplasty of the Lateral Compartment: A Series of 246 Cases
Background: Isolated osteoarthritis of the lateral compartment of the knee is less common than that of the medial compartment, resulting in significantly fewer lateral unicompartmental knee arthroplasties (UKAs) being performed. This study aimed to evaluate results of a fixed-bearing UKA for the tre...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-10-01
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| Series: | Arthroplasty Today |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352344123000882 |
| _version_ | 1797653950575411200 |
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| author | Michael Fitzsimons, MCh Johan van der Stok, PhD Joseph M. Queally, MD Turlough O'Donnell, MD |
| author_facet | Michael Fitzsimons, MCh Johan van der Stok, PhD Joseph M. Queally, MD Turlough O'Donnell, MD |
| author_sort | Michael Fitzsimons, MCh |
| collection | DOAJ |
| description | Background: Isolated osteoarthritis of the lateral compartment of the knee is less common than that of the medial compartment, resulting in significantly fewer lateral unicompartmental knee arthroplasties (UKAs) being performed. This study aimed to evaluate results of a fixed-bearing UKA for the treatment of lateral compartment osteoarthritis of the knee. Methods: A prospectively collected cohort of 255 patients undergoing fixed-bearing UKA of the lateral compartment using the Triathlon PKR (Stryker, Warsaw, IND) implant with a minimum 2-year follow-up was reviewed. The Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) score, radiographic alignment, complications, reoperations, and revisions were recorded. Patient factors and pre- and post-surgical alignment were assessed for their association with a minimum important change (MIC) of the total WOMAC score. Results: A total of 246 implants with a mean follow-up of 6.6 years (2-10.8 years) were included (4% lost to follow-up). The total WOMAC score increased from 61.3 ± 3.5 to 85.3 ± 7.5, exceeding the MIC in 215 patients (88%). Exceeding the MIC was not associated with age, body mass index, or alignment. The 5-year implant revision rate was 1.6% (3/187). Conclusions: The fixed-bearing Stryker Triathlon PKR implant for lateral UKA resulted in good clinical outcomes with a low revision rate at midterm follow-up. Body mass index, age, and pre- and post-surgical alignment did not correlate with the clinical outcome. Long-term follow-up is necessary to determine if the clinical improvement and low revision rate can be maintained. |
| first_indexed | 2024-03-11T16:52:17Z |
| format | Article |
| id | doaj.art-497dd13866c84f178b933614afb0fc74 |
| institution | Directory Open Access Journal |
| issn | 2352-3441 |
| language | English |
| last_indexed | 2024-03-11T16:52:17Z |
| publishDate | 2023-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Arthroplasty Today |
| spelling | doaj.art-497dd13866c84f178b933614afb0fc742023-10-21T04:22:43ZengElsevierArthroplasty Today2352-34412023-10-0123101183Fixed-Bearing Unicompartmental Knee Arthroplasty of the Lateral Compartment: A Series of 246 CasesMichael Fitzsimons, MCh0Johan van der Stok, PhD1Joseph M. Queally, MD2Turlough O'Donnell, MD3The Centre for Orthopaedics, Beacon Hospital, Dublin, Ireland; Corresponding author. Mater Misericordia University Hospital, Eccles St, Dublin 7 D07 R2WY, Ireland. Tel.: +353 87 953 3286.The Centre for Orthopaedics, Beacon Hospital, Dublin, IrelandThe Centre for Orthopaedics, Beacon Hospital, Dublin, IrelandThe Centre for Orthopaedics, Beacon Hospital, Dublin, Ireland; UCD School of Medicine, University College Dublin, Dublin, IrelandBackground: Isolated osteoarthritis of the lateral compartment of the knee is less common than that of the medial compartment, resulting in significantly fewer lateral unicompartmental knee arthroplasties (UKAs) being performed. This study aimed to evaluate results of a fixed-bearing UKA for the treatment of lateral compartment osteoarthritis of the knee. Methods: A prospectively collected cohort of 255 patients undergoing fixed-bearing UKA of the lateral compartment using the Triathlon PKR (Stryker, Warsaw, IND) implant with a minimum 2-year follow-up was reviewed. The Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) score, radiographic alignment, complications, reoperations, and revisions were recorded. Patient factors and pre- and post-surgical alignment were assessed for their association with a minimum important change (MIC) of the total WOMAC score. Results: A total of 246 implants with a mean follow-up of 6.6 years (2-10.8 years) were included (4% lost to follow-up). The total WOMAC score increased from 61.3 ± 3.5 to 85.3 ± 7.5, exceeding the MIC in 215 patients (88%). Exceeding the MIC was not associated with age, body mass index, or alignment. The 5-year implant revision rate was 1.6% (3/187). Conclusions: The fixed-bearing Stryker Triathlon PKR implant for lateral UKA resulted in good clinical outcomes with a low revision rate at midterm follow-up. Body mass index, age, and pre- and post-surgical alignment did not correlate with the clinical outcome. Long-term follow-up is necessary to determine if the clinical improvement and low revision rate can be maintained.http://www.sciencedirect.com/science/article/pii/S2352344123000882ArthroplastyFixed-bearing implantGonarthrosisUnicompartmental knee arthroplasty |
| spellingShingle | Michael Fitzsimons, MCh Johan van der Stok, PhD Joseph M. Queally, MD Turlough O'Donnell, MD Fixed-Bearing Unicompartmental Knee Arthroplasty of the Lateral Compartment: A Series of 246 Cases Arthroplasty Today Arthroplasty Fixed-bearing implant Gonarthrosis Unicompartmental knee arthroplasty |
| title | Fixed-Bearing Unicompartmental Knee Arthroplasty of the Lateral Compartment: A Series of 246 Cases |
| title_full | Fixed-Bearing Unicompartmental Knee Arthroplasty of the Lateral Compartment: A Series of 246 Cases |
| title_fullStr | Fixed-Bearing Unicompartmental Knee Arthroplasty of the Lateral Compartment: A Series of 246 Cases |
| title_full_unstemmed | Fixed-Bearing Unicompartmental Knee Arthroplasty of the Lateral Compartment: A Series of 246 Cases |
| title_short | Fixed-Bearing Unicompartmental Knee Arthroplasty of the Lateral Compartment: A Series of 246 Cases |
| title_sort | fixed bearing unicompartmental knee arthroplasty of the lateral compartment a series of 246 cases |
| topic | Arthroplasty Fixed-bearing implant Gonarthrosis Unicompartmental knee arthroplasty |
| url | http://www.sciencedirect.com/science/article/pii/S2352344123000882 |
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