The role of proximal tibiofibular joint (TFJ) transfixion during Ilizarov tibial lengthening is still debated in the literature. The aim of this study was to show that TFJ transfixion can be avoided with no impact on patient outcome. All achondroplastic patients undergoing tibia lengthening from 1999 to 2018 were included. Patients were divided in two groups: group A (11 patients) submitted to proximal TFJ transfixion and group B (22 patients) not submitted to TFJ transfixion. The results showed a statistically significant difference in proximal fibular migration (PFM) between the two groups of patients, with a mean PFM of 9.2 mm (range, 1–20 mm) and of 21 mm (range, 2.7–76 mm) in group A and in group B, respectively. We can state that PFM up to 41 mm in our series did not affect joint function and stability. There are no statistically significant differences in the other radiological parameters. Analysis of functional scores (Knee Society, Tegner-Lhysolm, Association for the Study and Application of Methods of Ilizarov) did not reveal significant differences between the groups. The scores of the Achondroplasia Personal Life Experience Scale were also similar in the two groups, demonstrating a good quality of life. There are no differences between the two groups in terms of clinical-functional outcome of the knee, radiographic results, and quality of life. Transfixion of proximal TFJ may not be necessary, but it is important to avoid premature consolidation of the fibular osteotomy.

近端下胫腓关节 (TFJ) 贯穿固定在 Ilizarov胫骨延长过程中的作用在文献中仍然存在争议。本研究的目的是表明可以避免 TFJ 固定而不影响患者的治疗结果。包括 1999 年至 2018 年所有接受胫骨延长术的软骨发育不全患者。患者被分为两组：A 组（11 名患者）接受近端 TFJ 贯穿固定，B 组（22 名患者）不接受 TFJ 贯穿固定。结果显示，两组患者的近端腓骨迁移（PFM）存在统计学显着差异，组中平均 PFM 为 9.2 毫米（范围为 1-20 毫米）和 21 毫米（范围为 2.7-76 毫米）分别属于A组和B组。我们可以说，我们系列中高达 41 毫米的 PFM 不会影响关节功能和稳定性。其他放射学参数没有统计学上的显着差异。功能评分分析（膝关节协会、Tegner-Lhysolm、Ilizarov 方法研究和应用协会）并未显示各组之间存在显着差异。两组的软骨发育不全个人生活体验量表得分也相似，显示出良好的生活质量。两组在膝关节临床功能结果、放射学结果和生活质量方面没有差异。近端 TFJ 的贯穿可能不是必需的，但重要的是要避免腓骨截骨过早巩固。