Abstract: Objective To propose a new method for measuring the anatomical parameters of the proximal tibiofibular joint （PTFJ） and to evaluate the correlation between PTFJ anatomical parameters and the occurrence of knee osteoarthritis （OA）. Methods Magnetic resonance imaging data from 81 adults were collected and divided into an OA group （40 cases） and a healthy group （41 cases）. By comparing the inclination angle, declination angle, and contact area （including PTFJ contact area S, lateral stress-bearing area Sφ, weight-bearing area Sτ, and posterior stress-bearing area Sν） of the PTFJ between the two groups, the correlation between PTFJ anatomical parameters and the occurrence of knee osteoarthritis was analyzed. Results The inclination angle, declination angle, and contact areas （S, Sτ, Sν） of the PTFJ in the OA group were significantly greater than those in the healthy group （P<0.05）. There was no statistically significant difference between the two groups in the lateral stress-bearing area （Sφ）, age, or BMI （P>0.05）. Conclusion The anatomical parameters of the proximal tibiofibular joint have a significant impact on the occurrence of knee osteoarthritis; the method of measuring PTFJ anatomical parameters using magnetic resonance imaging demonstrates high accuracy.

Key words: proximal tibiofibular joint, knee osteoarthritis, anatomical parameters

摘要： 目的 旨在提出一种测量近端胫腓关节（PTFJ）解剖参数的新方法,并评估PTFJ解剖参数与膝骨关节炎（OA）发生之间的相关性。方法 收集81例成年人的磁共振成像资料,分为OA组（40例）和健康组（41例）。通过比较两组PTFJ的倾斜角、下倾角及接触面积（包括PTFJ接触区面积S、外侧应力支撑区面积Sφ、承重区面积Sτ及后侧应力支撑区面积Sν）,分析PTFJ解剖参数与膝骨关节炎发生之间的相关性。结果 OA组PTFJ的倾斜角、下倾角及接触面积（S、Sτ、Sν）均显著大于健康组（P<0.05）。两组在外侧应力支撑区面积（Sφ）、年龄及BMI方面差异无统计学意义（P>0.05）。结论 近端胫腓关节的解剖参数对膝骨关节炎的发生具有重要影响;采用磁共振成像测量PTFJ解剖参数的方法具有较高的精确性。

关键词: 近端胫腓关节, 膝骨关节炎, 解剖参数