Abstract
BackgroundThis study aimed to assess the radii of the distal and posterior articular surfaces of the medial femoral condyle in a Chinese population and provide detailed parameters of the knee joint for the future design of UKA components.MethodsThis study included 500 consecutive Chinese patients who underwent knee MRI from Jan 2019 to Jan 2020. The two most appropriate circles were used to reveal the distal and posterior joint surfaces in the sagittal plane of the MRI images. The radius of the circle representing the distal articular surface in the sagittal plane was measured as R1, and the radius of the posterior articular surface was measured as R2. The distance between the centers of the two rotation circles was recorded as d. An independent t test was used to compare the differences between men and women. The Pearson correlation coefficient was calculated to analyze the correlation between R1 and R2. SPSS v19.0 software was used for statistical analysis.ResultsThe average values of R1, R2, R1/R2 and d were calculated. Scatter plots were constructed to show the trend of changes in the radius of the distal and posterior articular surfaces of the femoral condyle. R1, R2 and d differed significantly between men and women (p < 0.05). Correlation analysis showed that R1 was positively correlated with R2 (r = 0.61, p < 0.05).ConclusionsThe data of the radii of the distal and posterior articular surfaces of the medial femoral condyle were provided. In the UKA design, the relationships between the radii of the distal and posterior articular surfaces should be taken into account.
Highlights
This study aimed to assess the radii of the distal and posterior articular surfaces of the medial femoral condyle in a Chinese population and provide detailed parameters of the knee joint for the future design of Unicompartmental knee arthroplasty (UKA) components
Most UKA components currently used in China are designed for the physique of Western individuals, and many studies have shown that components designed for Western patients are not matched for other populations [4,5,6]
The current studies focus mainly on measurements of the knee joint related to total knee arthroplasty (TKA), and research on the size and shape parameters of the knee joint related to UKA is scarce
Summary
This study aimed to assess the radii of the distal and posterior articular surfaces of the medial femoral condyle in a Chinese population and provide detailed parameters of the knee joint for the future design of UKA components. UKA can effectively relieve pain and improve function by surface replacement in the lesion compartment. It has the advantages of minimal trauma and rapid recovery, and the longterm and medium-term curative effects are satisfactory [1,2,3]. The measurement of medial femoral condyle parameters is unsatisfactory, and insufficient knee joint parameter data are available to support the design of a UKA component suitable for use in Chinese populations. The current studies focus mainly on measurements of the knee joint related to total knee arthroplasty (TKA), and research on the size and shape parameters of the knee joint related to UKA is scarce
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