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Conference Paper: The Coronal Plane Alignment of the Knee (CPAK) classification in Chinese patients with knee osteoarthritis
Title | The Coronal Plane Alignment of the Knee (CPAK) classification in Chinese patients with knee osteoarthritis |
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Authors | |
Issue Date | 5-Nov-2023 |
Abstract | Introduction: Coronal Plane Alignment of the Knee (CPAK) is a pragmatic and comprehensive classification system for heathy and arthritic knees. This study aims to apply the CPAK classification in Chinese osteoarthritic knees. |
Persistent Identifier | http://hdl.handle.net/10722/340774 |
DC Field | Value | Language |
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dc.contributor.author | Fu, Chun Him Henry | - |
dc.contributor.author | Fang, Yan Jin Samuel | - |
dc.contributor.author | Cheung, Yim Ling Amy | - |
dc.contributor.author | Cheung, Man Hong | - |
dc.contributor.author | Luk, Michelle Hilda | - |
dc.contributor.author | Chan, Ping Keung | - |
dc.contributor.author | Chiu, Kwong Yuen Peter | - |
dc.date.accessioned | 2024-03-11T10:47:01Z | - |
dc.date.available | 2024-03-11T10:47:01Z | - |
dc.date.issued | 2023-11-05 | - |
dc.identifier.uri | http://hdl.handle.net/10722/340774 | - |
dc.description.abstract | <p>Introduction: Coronal Plane Alignment of the Knee (CPAK) is a pragmatic and comprehensive classification system for heathy and arthritic knees. This study aims to apply the CPAK classification in Chinese osteoarthritic knees.<br>Methods: Chinese patients undergoing total knee arthroplasty for primary knee osteoarthritis at an academic institution between January 2021 and January 2023 were included. Radiological analysis of the preoperative weight-bearing long- films was performed. The lateral distal femoral angle (LDFA) and medial proximal tibial angle (MPTA) were measured. The patients were grouped into 9 CPAK phenotypes based on the arithmetic hip-knee-ankle angle (aHKA) and joint line obliquity (JLO).<br>Results: 500 knees (269 patients) were included, mean age was 70.0±6.4. Female-to-male ratio was 2.2:1. Mean aHKA was 4.1° varus ± 4.1°, mean JLO was 174.3°±3.2°. The most common CPAK phenotypes were type I at 48.6%, II at 23.2% and IV at 18.2%. No patients had an apex proximal JLO (phenotype VII, VIII and IX). Mean aHKA was significantly more varus in males at 4.9° (p<0.01). They also had significantly greater tibial and femoral varus (p<0.05) with a mean LDFA of 89.6°±2.9° and mean MPTA of 84.7°±2.3°. There were no significant differences in JLO. The percentage of phenotype I knees were greater in males (59.9% vs 43.4%, p<0.05), while phenotypes II (25.9% vs 17.2%, p<0.05) and III (5.0% vs 1.3%, p<0.05) were greater in females.<br>Conclusion: Chinese knees are more constitutional varus when compared to western European knees. There is a left and up shift of the lower limb alignment distribution on the CPAK matrix with 90% of patients falling within phenotypes I, II and IV.</p> | - |
dc.language | eng | - |
dc.relation.ispartof | 43rd Annual Congress of The Hong Kong Orthopaedic Association (04/11/2023-05/11/2023, Hong Kong) | - |
dc.title | The Coronal Plane Alignment of the Knee (CPAK) classification in Chinese patients with knee osteoarthritis | - |
dc.type | Conference_Paper | - |
dc.identifier.spage | 83 | - |