Knee phenotypes distribution according to CPAK classification in Turkish population
Objective: This study aimed to investigate the distribution of knee phenotypes based on the CPAK classification in healthy nonarthritic subjects and osteoarthritic patients in Türkiye. Methods: Radiological EOS analysis of nonarthritic 1172 knees and osteoarthritic 571 knees was evaluated to clar...
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AVES
2024-11-01
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| Series: | Acta Orthopaedica et Traumatologica Turcica |
| Online Access: | https://www.aott.org.tr/en/knee-phenotypes-distribution-according-to-cpak-classification-in-turkish-population-137436 |
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| author | Vahit Emre Özden Göksel Dikmen Kayahan Karaytuğ Arda Mavi Yılmaz Onat Köylüoğlu İsmail Remzi Tözün |
| author_facet | Vahit Emre Özden Göksel Dikmen Kayahan Karaytuğ Arda Mavi Yılmaz Onat Köylüoğlu İsmail Remzi Tözün |
| author_sort | Vahit Emre Özden |
| collection | DOAJ |
| description | Objective: This study aimed to investigate the distribution of knee phenotypes based on the CPAK classification in healthy nonarthritic subjects and osteoarthritic patients in Türkiye.
Methods: Radiological EOS analysis of nonarthritic 1172 knees and osteoarthritic 571 knees was evaluated to clarify the distribution of CPAK classification. The knees were categorized into 9 subgroups according to the arithmetic hip-knee-ankle (aHKA) angle and joint-line obliquity (JLO). The medial proximal tibial angle (MPTA) and lateral distal femoral angle (LDFA) were used to calculate aHKA and JLO. The Sectra workstation program was used for all radiological measurements.
Results: In the nonarthritic group, CPAK distribution was 20.9% type I (n=245), 2.5% type II (n=30), 0.08% type III (n=1), 46.67% type IV (n=545), 7.7% type V (n=91), 0.7% type VI (n=9), 18% type VII (n=211), 2.9% type VIII (n=35), 0.2% type IX (n=3). The mean JLO was 173.7 ± 4.38, and the mean aHKA was 0.15 ± 3.81 in nonarthritic group. Arthritic group CPAK type distribution was 20.7% type I (n=118), 3.1% type II (n=18), 0.17% type III (n=1), 57.1% type IV (n=326), 8.4% type V (n=48), 0.17% type VI (n=1), 7.8% type VII (n=45), 1.4% type VIII (n=8), and 0.8% type IX (n=5). The mean JLO was 174.2 ± 3.78, and the mean aHKA was !2.21 ± 4.48 in the osteoarthritic group.
Conclusion: CPAK type IV and CPAK type I were the most common subgroups in the nonarthritic and arthritic groups. CPAK type 5, which is the target of the mechanical alignment strategy, is only 7.8% in the nonarthritic group and 8.4% in the osteoarthritic group in the Turkish population.
Level of Evidence: Level III, Diagnostic Study |
| format | Article |
| id | doaj-art-d3488113831f441a9400f7aeedce23fe |
| institution | Kabale University |
| issn | 1017-995X |
| language | English |
| publishDate | 2024-11-01 |
| publisher | AVES |
| record_format | Article |
| series | Acta Orthopaedica et Traumatologica Turcica |
| spelling | doaj-art-d3488113831f441a9400f7aeedce23fe2025-02-03T12:50:07ZengAVESActa Orthopaedica et Traumatologica Turcica1017-995X2024-11-0158634134510.5152/j.aott.2024.24053Knee phenotypes distribution according to CPAK classification in Turkish populationVahit Emre Özden0https://orcid.org/0000-0003-1082-4882Göksel Dikmen1Kayahan Karaytuğ2Arda Mavi3https://orcid.org/0000-0001-6371-6549Yılmaz Onat Köylüoğlu4https://orcid.org/0000-0002-2776-6650İsmail Remzi Tözün5https://orcid.org/0000-0003-4234-6555Department of Orthopedics and Traumatology, Acibadem Mehmet Ali Aydinlar University Faculty of Medicine, Istanbul, Türkiye ; Department of Orthopedics and Traumatology, International Joint Centre (IJC), Acibadem Maslak Hospital, Istanbul, TürkiyeDepartment of Orthopedics and Traumatology, Acibadem Mehmet Ali Aydinlar University Faculty of Medicine, Istanbul, Türkiye ; Department of Orthopedics and Traumatology, International Joint Centre (IJC), Acibadem Maslak Hospital, Istanbul, TürkiyeDepartment of Orthopedics and Traumatology, Acibadem Mehmet Ali Aydinlar University Faculty of Medicine, Istanbul, Türkiye ; Department of Orthopedics and Traumatology, International Joint Centre (IJC), Acibadem Maslak Hospital, Istanbul, TürkiyeUndergraduate, Acibadem Mehmet Ali Aydınlar University Faculty of Medicine, Istanbul, TürkiyeUndergraduate, Acibadem Mehmet Ali Aydınlar University Faculty of Medicine, Istanbul, TürkiyeDepartment of Orthopedics and Traumatology, Acibadem Mehmet Ali Aydinlar University Faculty of Medicine, Istanbul, Türkiye ; Department of Orthopedics and Traumatology, International Joint Centre (IJC), Acibadem Maslak Hospital, Istanbul, TürkiyeObjective: This study aimed to investigate the distribution of knee phenotypes based on the CPAK classification in healthy nonarthritic subjects and osteoarthritic patients in Türkiye. Methods: Radiological EOS analysis of nonarthritic 1172 knees and osteoarthritic 571 knees was evaluated to clarify the distribution of CPAK classification. The knees were categorized into 9 subgroups according to the arithmetic hip-knee-ankle (aHKA) angle and joint-line obliquity (JLO). The medial proximal tibial angle (MPTA) and lateral distal femoral angle (LDFA) were used to calculate aHKA and JLO. The Sectra workstation program was used for all radiological measurements. Results: In the nonarthritic group, CPAK distribution was 20.9% type I (n=245), 2.5% type II (n=30), 0.08% type III (n=1), 46.67% type IV (n=545), 7.7% type V (n=91), 0.7% type VI (n=9), 18% type VII (n=211), 2.9% type VIII (n=35), 0.2% type IX (n=3). The mean JLO was 173.7 ± 4.38, and the mean aHKA was 0.15 ± 3.81 in nonarthritic group. Arthritic group CPAK type distribution was 20.7% type I (n=118), 3.1% type II (n=18), 0.17% type III (n=1), 57.1% type IV (n=326), 8.4% type V (n=48), 0.17% type VI (n=1), 7.8% type VII (n=45), 1.4% type VIII (n=8), and 0.8% type IX (n=5). The mean JLO was 174.2 ± 3.78, and the mean aHKA was !2.21 ± 4.48 in the osteoarthritic group. Conclusion: CPAK type IV and CPAK type I were the most common subgroups in the nonarthritic and arthritic groups. CPAK type 5, which is the target of the mechanical alignment strategy, is only 7.8% in the nonarthritic group and 8.4% in the osteoarthritic group in the Turkish population. Level of Evidence: Level III, Diagnostic Studyhttps://www.aott.org.tr/en/knee-phenotypes-distribution-according-to-cpak-classification-in-turkish-population-137436 |
| spellingShingle | Vahit Emre Özden Göksel Dikmen Kayahan Karaytuğ Arda Mavi Yılmaz Onat Köylüoğlu İsmail Remzi Tözün Knee phenotypes distribution according to CPAK classification in Turkish population Acta Orthopaedica et Traumatologica Turcica |
| title | Knee phenotypes distribution according to CPAK classification in Turkish population |
| title_full | Knee phenotypes distribution according to CPAK classification in Turkish population |
| title_fullStr | Knee phenotypes distribution according to CPAK classification in Turkish population |
| title_full_unstemmed | Knee phenotypes distribution according to CPAK classification in Turkish population |
| title_short | Knee phenotypes distribution according to CPAK classification in Turkish population |
| title_sort | knee phenotypes distribution according to cpak classification in turkish population |
| url | https://www.aott.org.tr/en/knee-phenotypes-distribution-according-to-cpak-classification-in-turkish-population-137436 |
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