Objective

Fixation of unstable osteochondritis dissecans (OCD) lesions and displaced osteochondral fragments are frequently performed procedures in pediatric orthopedic surgery. Since 2018, CE-certified MAGNEZIX pins are used in our institution in these cases. The aim of this study was (1) to analyze safety, efficiency, and limitations of magnesium-pin-based fixation of unstable OCD lesions and displaced osteochondral fragments and (2) to report clinical and radiological outcomes at short-term follow-up (FU).

Design

In this prospective cohort study, 19 patients (10 girls and 9 boys) were included. Inclusion criteria were (1) magnetic resonance imaging–confirmed unstable OCD lesion or displaced osteochondral fragment, (2) fixation with magnesium-based pins, and (3) minimum FU of 6 months. X-rays were taken 6 weeks and 6 months after operation and magnetic resonance imaging scans every 4 to 6 months to assess the healing progress.

Results

In total 67 pins were used, with a mean of 3.6 ± 1.4 per patient. Average age at surgery was 13.7 years (11-17 years). Mean time of operation was 56 ± 31 minutes, including arthroscopy, fixation, and patellar realignment (n = 6). No intraoperative complications occurred. Average FU was 11.3 ± 4.2 months (6-20 months). No redislocation or new dislocation occurred. Until now a complete radiographic healing occurred in 12 cases. Due to an implant failure in one case 11 weeks after the index surgery a revision became necessary.

Conclusions

In short-term FU of 11 ± 4 months MAGNEZIX pins provide high stability after fixation of unstable OCDs and displaced osteochondral fragments leading to uncomplicated and timely healing.

中文翻译：

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在青少年中使用新型可生物降解镁针固定不稳定的剥脱性骨软骨炎病变和移位的骨软骨碎片。

客观的

不稳定的剥脱性骨软骨炎 (OCD) 病变和移位的骨软骨碎片的固定是儿科骨科手术中经常进行的操作。自 2018 年以来，我们机构在这些情况下使用了 CE 认证的 MAGNEZIX 引脚。本研究的目的是 (1) 分析基于镁针的不稳定 OCD 病变和移位的骨软骨碎片的安全性、效率和局限性，以及 (2) 报告短期随访的临床和放射学结果。福）。

设计

在这项前瞻性队列研究中，纳入了 19 名患者（10 名女孩和 9 名男孩）。纳入标准是（1）磁共振成像证实不稳定的强迫症病变或移位的骨软骨碎片，（2）用镁基针固定，和（3）至少 6 个月的 FU。术后 6 周和 6 个月拍摄 X 光片，每 4 至 6 个月进行一次磁共振成像扫描以评估愈合进展。

结果

总共使用了 67 个针，平均每位患者 3.6 ± 1.4 个。手术的平均年龄为 13.7 岁（11-17 岁）。平均手术时间为 56 ± 31 分钟，包括关节镜检查、固定和髌骨重新排列（n = 6）。未发生术中并发症。平均 FU 为 11.3 ± 4.2 个月（6-20 个月）。没有发生再错位或新错位。到目前为止，有 12 例患者的影像学完全愈合。由于一个病例在指数手术后 11 周植入失败，因此需要进行翻修。

结论

在 11 ± 4 个月的短期 FU 中，MAGNEZIX 针在固定不稳定的强迫症和移位的骨软骨碎片后提供高稳定性，从而实现简单且及时的愈合。