Wong Wai Kit, Abu Bakar Sajak Azliana, Chua Hwa Sen
Department of Orthopaedics and Traumatology, Hospital Ampang, Ampang, Selangor, 68000, Malaysia.
Clinical Research Centre, Sunway Medical Centre, Bandar Sunway, Subang Jaya, Selangor, 47500, Malaysia.
Arthroplasty. 2024 Dec 4;6(1):60. doi: 10.1186/s42836-024-00281-z.
Only 80% of patients are satisfied with their outcomes post-TKA. Mounting attention has been paid to constitutional limb alignment and individualized alignment strategies in recent years. MacDessi et al. proposed the CPAK classification, which takes into account the patients' arithmetic hip-knee-ankle axis (aHKA) and joint line obliquity (JLO). In this study, we aimed to establish local demographic data, compare them with published data, and assess their correlations with modifiable variables.
A total of 500 end-stage osteoarthritic knees subjected to TKA were radiologically analyzed. The lateral distal femoral angle (LDFA) and medial proximal tibial angle (MPTA) were calculated from long limb radiographs before the aHKA and JLO were derived and a CPAK phenotype was assigned. Demographic data were harvested and analyzed for possible correlations.
There were 160 males (32%) and 340 females (68%), with a mean age of 66.42 years (range, 47-88). The mean MPTA was 85.8° (± 3.0)°, and the mean LDFA was 87.6° (± 2.4)°. The average aHKA was a varus of 1.8° (± 4.2)°, and the average JLO was 173.4° (± 3.45)°. The most common CPAK phenotype was Type 1 (43.4%). The Intraclass Correlation Coefficient demonstrated excellent reliability (> 0.9). No correlation existed between CPAK phenotypes and age, height, weight, or body mass index (BMI), but CPAK phenotype was significantly correlated with gender.
An urban Malaysian population with osteoarthritic knees was found to be constitutionally varus, with the most common phenotype being varus aHKA with an apex-distal JLO. Constitutional alignment is not influenced by factors such as age, height, weight, or BMI.
Retrospective Observational Study-III.
全膝关节置换术（TKA）后仅有80%的患者对其治疗结果满意。近年来，人们越来越关注肢体的先天性对线和个体化对线策略。MacDessi等人提出了CPAK分类法，该分类法考虑了患者的算术髋-膝-踝轴（aHKA）和关节线倾斜度（JLO）。在本研究中，我们旨在建立当地的人口统计学数据，将其与已发表的数据进行比较，并评估它们与可改变变量之间的相关性。
对500例接受TKA的终末期骨关节炎膝关节进行放射学分析。从长腿X线片上计算外侧股骨远端角（LDFA）和内侧胫骨近端角（MPTA），然后得出aHKA和JLO，并确定CPAK表型。收集人口统计学数据并分析其可能的相关性。
共有160名男性（32%）和340名女性（68%），平均年龄为66.42岁（范围47 - 88岁）。平均MPTA为85.8°（±3.0）°，平均LDFA为87.6°（±2.4）°。平均aHKA为内翻1.8°（±4.2）°，平均JLO为173.4°（±3.45）°。最常见的CPAK表型是1型（43.4%）。组内相关系数显示出极好的可靠性（>0.9）。CPAK表型与年龄、身高、体重或体重指数（BMI）之间不存在相关性，但CPAK表型与性别显著相关。
发现患有骨关节炎膝关节的马来西亚城市人群先天性内翻，最常见的表型是aHKA内翻且JLO顶点向远端。先天性对线不受年龄、身高、体重或BMI等因素的影响。
回顾性观察研究-III级。
