Coronal plane alignment of knee joint (C.P.A.K.) classification in Indian population-study of a new classification system in Indian knees
Background: Distribution of CPAK types in Indian knees will help surgeons better understand management of knee arthritis using concept of Kinematic alignment (K.A.). C.P.A.K. uses a matrix of 9 phenotypes of knees based on arithmetic hip knee ankle angle (aHKA) and Joint Line Obliquity (JLO). Method...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-09-01
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| Series: | Journal of Orthopaedic Reports |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2773157X23001492 |
| _version_ | 1797398903812784128 |
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| author | Vinay Samant Mohan Desai |
| author_facet | Vinay Samant Mohan Desai |
| author_sort | Vinay Samant |
| collection | DOAJ |
| description | Background: Distribution of CPAK types in Indian knees will help surgeons better understand management of knee arthritis using concept of Kinematic alignment (K.A.). C.P.A.K. uses a matrix of 9 phenotypes of knees based on arithmetic hip knee ankle angle (aHKA) and Joint Line Obliquity (JLO). Methods: A radiological analysis of 200 healthy knees (HC) and 250 osteoarthritic knees (OC) was done and were classified based on C.P.A.K. classification. Primary outcomes include descriptive analysis of both groups, and comparison between frequencies of types within each group. Results: The commonest CPAK types in Healthy group were type 5, type 2, type 1. For arthritic group, common types in order were type 1, type 4 and type 2. Varus CPAK types (1,4,7) accounted for 34 % of HC types while 59 % of OC type, with odds of developing osteoarthritis in type 1 CPAK being 2.84 while that for type 4 were 2.02. Out of 450 knees studied 216 (48 %) accounted for varus alignment. Conclusion: C.P.A.K. classification can be used to understand the targets for TKR in Indian population. Constitutional varus being commoner in Indian knees (48 %) than their western counterparts implies that majority of Indian knees are in constitutional varus dynamics, hence K.A. caters to majority of the population. Arthritic Indian populations are predominantly of types C.P.A.K. 1 (34 %) and 4 (22 %). Further research is needed to understand which Indian knee types benefit the most from KA TKR. |
| first_indexed | 2024-03-09T01:32:15Z |
| format | Article |
| id | doaj.art-6c4b9c9b44b04ed38395f49d62936aa2 |
| institution | Directory Open Access Journal |
| issn | 2773-157X |
| language | English |
| last_indexed | 2024-03-09T01:32:15Z |
| publishDate | 2024-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Orthopaedic Reports |
| spelling | doaj.art-6c4b9c9b44b04ed38395f49d62936aa22023-12-09T06:09:30ZengElsevierJournal of Orthopaedic Reports2773-157X2024-09-0133100277Coronal plane alignment of knee joint (C.P.A.K.) classification in Indian population-study of a new classification system in Indian kneesVinay Samant0Mohan Desai1Department of Orthopaedics, H.B.T. Medical College and R.N. Cooper Hospital, Seth G.S. Medical College and King Edward Memorial Hospital Mumbai, India; Corresponding author. Department of Orthopaedics, OPD no. 30, ground floor, Hospital Building, H.B.T. Medical college and R.N. Cooper hospital, JVPD scheme, Juhu, Mumbai, 400056, India.Department of Orthopaedics, Seth G.S Medical College and King Edward Memorial College, Seth G.S.M.C. and K.E.M.H, Mumbai, IndiaBackground: Distribution of CPAK types in Indian knees will help surgeons better understand management of knee arthritis using concept of Kinematic alignment (K.A.). C.P.A.K. uses a matrix of 9 phenotypes of knees based on arithmetic hip knee ankle angle (aHKA) and Joint Line Obliquity (JLO). Methods: A radiological analysis of 200 healthy knees (HC) and 250 osteoarthritic knees (OC) was done and were classified based on C.P.A.K. classification. Primary outcomes include descriptive analysis of both groups, and comparison between frequencies of types within each group. Results: The commonest CPAK types in Healthy group were type 5, type 2, type 1. For arthritic group, common types in order were type 1, type 4 and type 2. Varus CPAK types (1,4,7) accounted for 34 % of HC types while 59 % of OC type, with odds of developing osteoarthritis in type 1 CPAK being 2.84 while that for type 4 were 2.02. Out of 450 knees studied 216 (48 %) accounted for varus alignment. Conclusion: C.P.A.K. classification can be used to understand the targets for TKR in Indian population. Constitutional varus being commoner in Indian knees (48 %) than their western counterparts implies that majority of Indian knees are in constitutional varus dynamics, hence K.A. caters to majority of the population. Arthritic Indian populations are predominantly of types C.P.A.K. 1 (34 %) and 4 (22 %). Further research is needed to understand which Indian knee types benefit the most from KA TKR.http://www.sciencedirect.com/science/article/pii/S2773157X23001492Kinematic alignmentCoronal plane alignment of knee jointJoint line obliquityArithmetic hip knee ankle angleConstitutional varus |
| spellingShingle | Vinay Samant Mohan Desai Coronal plane alignment of knee joint (C.P.A.K.) classification in Indian population-study of a new classification system in Indian knees Journal of Orthopaedic Reports Kinematic alignment Coronal plane alignment of knee joint Joint line obliquity Arithmetic hip knee ankle angle Constitutional varus |
| title | Coronal plane alignment of knee joint (C.P.A.K.) classification in Indian population-study of a new classification system in Indian knees |
| title_full | Coronal plane alignment of knee joint (C.P.A.K.) classification in Indian population-study of a new classification system in Indian knees |
| title_fullStr | Coronal plane alignment of knee joint (C.P.A.K.) classification in Indian population-study of a new classification system in Indian knees |
| title_full_unstemmed | Coronal plane alignment of knee joint (C.P.A.K.) classification in Indian population-study of a new classification system in Indian knees |
| title_short | Coronal plane alignment of knee joint (C.P.A.K.) classification in Indian population-study of a new classification system in Indian knees |
| title_sort | coronal plane alignment of knee joint c p a k classification in indian population study of a new classification system in indian knees |
| topic | Kinematic alignment Coronal plane alignment of knee joint Joint line obliquity Arithmetic hip knee ankle angle Constitutional varus |
| url | http://www.sciencedirect.com/science/article/pii/S2773157X23001492 |
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