Fixed lateral unicompartmental knee replacement is a reliable treatment for lateral compartment osteoarthritis after mobile-bearing medial unicompartmental replacement
<p><strong>Purpose:</strong> Lateral osteoarthritis following medial unicompartmental knee replacement (UKR) is usually treated with total knee replacement, however, lateral UKR is a less invasive option that preserves a well-functioning medial UKR. This study aimed to det...
| Main Authors: | , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
Wiley
2023
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| _version_ | 1826313323674599424 |
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| author | Lazzara, JT Arthur, LW Jenkins, C Dodd, CAF Mellon, SJ Murray, DW |
| author_facet | Lazzara, JT Arthur, LW Jenkins, C Dodd, CAF Mellon, SJ Murray, DW |
| author_sort | Lazzara, JT |
| collection | OXFORD |
| description | <p><strong>Purpose:</strong> Lateral osteoarthritis following medial unicompartmental knee replacement (UKR) is usually treated with total knee replacement, however, lateral UKR is a less invasive option that preserves a well-functioning medial UKR. This study aimed to determine the 5-year outcome of the cemented Fixed Lateral Oxford UKR (FLO) when used for the treatment of severe lateral disease after medial Oxford unicompartmental knee replacement.</p>
<p><strong>Methods:</strong> Forty-four knees with lateral bone-on-bone osteoarthritis (<em>n = </em>43) and avascular necrosis (<em>n = </em>1) treated with the FLO following medial Oxford UKR were followed up prospectively. The Oxford Knee Score (OKS) and Tegner Activity Score (TAS) were collected pre- and post-operatively. Life-table analysis was used to determine survival rates.</p>
<p><strong>Results:</strong> The mean patient age at the time of FLO surgery was 74.4 years with a mean time of 12.1 years between the primary medial UKR and the conversion to a bi-UKR with a FLO. Mean follow-up of the FLO was 3.5 years. After FLO no intra-operative or medical complications, re-admissions, or mortality occurred. There was one reoperation in which a bearing was exchanged for a medial bearing dislocation. There were no revisions of the FLO, so the FLO survival rate at 5 years was 100% (24 at risk). The mean pre-operative OKS was 22, which significantly (<em>p < </em>0.0001) improved to a mean of 42, 42, and 40 at 1, 2, and 5 years, respectively. The median TAS had a non-significant improvement from 2.5 (Range 0–8) pre-operatively to 2 (Range 1–6) at 5 years postoperatively.</p>
<p><strong>Conclusion:</strong> The FLO is a reliable treatment for lateral osteoarthritis following medial UKR. At 5 years there was a 100% survival of the FLO with a mean OKS of 40.</p>
<p><strong>Level of evidence:</strong> IV, Prospective Case Series.</p> |
| first_indexed | 2024-09-25T04:11:14Z |
| format | Journal article |
| id | oxford-uuid:d8bf3406-d449-4960-b849-a20a00e7e6a9 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-09-25T04:11:14Z |
| publishDate | 2023 |
| publisher | Wiley |
| record_format | dspace |
| spelling | oxford-uuid:d8bf3406-d449-4960-b849-a20a00e7e6a92024-06-17T14:27:41ZFixed lateral unicompartmental knee replacement is a reliable treatment for lateral compartment osteoarthritis after mobile-bearing medial unicompartmental replacementJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:d8bf3406-d449-4960-b849-a20a00e7e6a9EnglishSymplectic ElementsWiley2023Lazzara, JTArthur, LWJenkins, CDodd, CAFMellon, SJMurray, DW<p><strong>Purpose:</strong> Lateral osteoarthritis following medial unicompartmental knee replacement (UKR) is usually treated with total knee replacement, however, lateral UKR is a less invasive option that preserves a well-functioning medial UKR. This study aimed to determine the 5-year outcome of the cemented Fixed Lateral Oxford UKR (FLO) when used for the treatment of severe lateral disease after medial Oxford unicompartmental knee replacement.</p> <p><strong>Methods:</strong> Forty-four knees with lateral bone-on-bone osteoarthritis (<em>n = </em>43) and avascular necrosis (<em>n = </em>1) treated with the FLO following medial Oxford UKR were followed up prospectively. The Oxford Knee Score (OKS) and Tegner Activity Score (TAS) were collected pre- and post-operatively. Life-table analysis was used to determine survival rates.</p> <p><strong>Results:</strong> The mean patient age at the time of FLO surgery was 74.4 years with a mean time of 12.1 years between the primary medial UKR and the conversion to a bi-UKR with a FLO. Mean follow-up of the FLO was 3.5 years. After FLO no intra-operative or medical complications, re-admissions, or mortality occurred. There was one reoperation in which a bearing was exchanged for a medial bearing dislocation. There were no revisions of the FLO, so the FLO survival rate at 5 years was 100% (24 at risk). The mean pre-operative OKS was 22, which significantly (<em>p < </em>0.0001) improved to a mean of 42, 42, and 40 at 1, 2, and 5 years, respectively. The median TAS had a non-significant improvement from 2.5 (Range 0–8) pre-operatively to 2 (Range 1–6) at 5 years postoperatively.</p> <p><strong>Conclusion:</strong> The FLO is a reliable treatment for lateral osteoarthritis following medial UKR. At 5 years there was a 100% survival of the FLO with a mean OKS of 40.</p> <p><strong>Level of evidence:</strong> IV, Prospective Case Series.</p> |
| spellingShingle | Lazzara, JT Arthur, LW Jenkins, C Dodd, CAF Mellon, SJ Murray, DW Fixed lateral unicompartmental knee replacement is a reliable treatment for lateral compartment osteoarthritis after mobile-bearing medial unicompartmental replacement |
| title | Fixed lateral unicompartmental knee replacement is a reliable treatment for lateral compartment osteoarthritis after mobile-bearing medial unicompartmental replacement |
| title_full | Fixed lateral unicompartmental knee replacement is a reliable treatment for lateral compartment osteoarthritis after mobile-bearing medial unicompartmental replacement |
| title_fullStr | Fixed lateral unicompartmental knee replacement is a reliable treatment for lateral compartment osteoarthritis after mobile-bearing medial unicompartmental replacement |
| title_full_unstemmed | Fixed lateral unicompartmental knee replacement is a reliable treatment for lateral compartment osteoarthritis after mobile-bearing medial unicompartmental replacement |
| title_short | Fixed lateral unicompartmental knee replacement is a reliable treatment for lateral compartment osteoarthritis after mobile-bearing medial unicompartmental replacement |
| title_sort | fixed lateral unicompartmental knee replacement is a reliable treatment for lateral compartment osteoarthritis after mobile bearing medial unicompartmental replacement |
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