Gender differences in morphology exist in posterior condylar offsets of the knee in Korean population

Abstract

Purpose This study aimed to analyze the morphometric data from magnetic resonance images of arthritic knees in Korean adults, and to identify the existence of morphological diferences of femoral posterior condylar ofset (PCO) between genders. Methods The diferences in anthropometric PCO data in 975 patients (825 female and 150 male) were evaluated. The distances from the anterior and posterior femoral shaft cortex line to the most posterior femoral condyle tangent line were deined as the anterior-posterior dimension (AP) and the PCO. The PCO ratio (PCOR) was calculated as PCO/AP. Results The medial PCO was greater than the lateral PCO (26.3 ± 2.2 vs. 24.3 ± 2.3 mm, p < 0.01). This diference was observed in both female patients (medial: 26.2 ± 2.2 mm vs. lateral: 24.2 ± 2.2 mm, p < 0.01) and male patients (medial: 26.8 ± 2.3 mm vs. lateral: 24.8 ± 2.4 mm, p < 0.01). The medial and lateral PCO values were also greater in male patients than in female ones (p < 0.01). In contrast, PCOR was greater in female patients than in male ones, both in the medial and lateral femoral condyles (p < 0.01). Conclusions It was shown that medial and lateral PCO and PCOR were asymmetric, and that there was gender diference in Korean population in our study. In addition, our data showed that the PCOR of contemporary TKAs may be small for Asian patients that may not be suicient to meet the needs of the Korean patient population. These results conirm that a genderspeciic femoral component design is necessary to recreate the PCO for male and female Asian populations. Level of evidence Non-consecutive patients, Level III.

Gender Differences in Patellar Positions among the Korean Population

“…The morphometric characteristics are related to genetic, environmental, and sociocultural conditions and lifestyle, health, and functional status. The variation complicates providing a standard interpretation of their respective values [20]. Therefore, this study is aimed at evaluating the patellar-position difference between the genders by using the Insall-Salvati ratio and MRI.…”

Computational biomechanics of knee joint arthroplasty : a review

“…6). Recently, a three-dimensional morphology study showed a gender difference for femoral posterior condylar offset and condylar height for the femoral trochlea in the Korean population (Koh et al, 2019b;Koh et al, 2019c). This study provides guidelines for the design of a suitable femoral component for TKA considering gender-specific differences in the Korean population (Koh, Nam, Chung, Kim, Chun and Kang, 2019b;Koh, Nam, Chung, Lee, Kim, Kim and Kang, 2019c).…”

Analysis of Gender Differences in the Rotational Alignment of the Distal Femur in Kinematically Aligned and Mechanically Aligned Total Knee Arthroplasty

“…Since women's knees show mediolaterally narrow and trapezoidal axial shapes [11,[20][21][22] and the orientation of the trochlear groove is also different from that of men's knees [41], there is a difference in orientation of the axes using bony landmarks. In addition, the sagittal curvature diameters [36] and posterior condylar offset [18,42], which are thought to have an effect on KAA, show a disparity between men and women. Therefore, if the same angular reference is applied in TKA, the anatomical diversity between men and women would be ignored.…”