PURPOSE The purpose of the study was to assess the outcomes of extensor mechanism reconstruction with proximal tibia-patellar tendon composite allograft. METHODS 24 consecutive patients treated with allograft-prosthetic composite for proximal tibia tumour resection and a conventional total knee arthroplasty were included. Extensor mechanism reconstruction was performed with a proximal tibia-patellar tendon composite allograft and the suture of the donor tendon to the remnant native patellar tendon. Function was evaluated by the Musculoskeletal Tumor Society score (MSTS) and range of motion. Western Ontario and MacMaster University (WOMAC) and visual analogue scale for pain also were used. RESULTS After a mean follow-up of 11.7 (range 3-15) years, mean MSTS score was 22.4 (range 20-30), mean flexion was 94.0° (range 84°-110°), and mean extension lag was 7.2° (range 0°-18°). The mean VAS-pain was 4.3 (range 2-6), and WOMAC score was 72.4 (range 58-100). There was no failure of the reconstructed extensor mechanism. CONCLUSION Patellar tendon reconstruction with allogeneic tissue from the proximal tibia allograft sutured to the recipient's remnant patellar tendon provides the mechanical support needed for healing of the reconstructed extensor mechanism with a substantial functional benefit to stabilize active knee extension and successful reconstruction survival at long-term. LEVEL OF EVIDENCE III.

中文翻译：

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使用近端胫骨-pat腱复合同种异体重建伸肌设备后，成功的中长期结果。

目的本研究的目的是评估胫骨-pat骨腱复合同种异体移植重建伸肌机制的结果。方法包括24例连续接受同种异体修复复合物治疗的胫骨近端肿瘤切除术和常规全膝关节置换术。用同种胫骨近端-pat腱复合材料同种异体移植，然后将供体腱缝合到残余的天然pa骨肌腱上，进行伸肌机理重建。通过肌肉骨骼肿瘤学会评分（MSTS）和运动范围评估功能。还使用了西安大略省和麦克马斯特大学（WOMAC）以及疼痛的视觉模拟量表。结果平均随访11.7年（范围3-15），MSTS评分平均为22.4（范围20-30），平均屈曲度为94.0°（范围84°-110°），平均延伸滞后为7.2°（范围为0°-18°）。平均VAS疼痛为4.3（范围2-6），WOMAC评分为72.4（范围58-100）。重建的伸肌机制没有失败。结论从胫骨近端同种异体移植到受体残余pa骨肌腱的同种异体组织进行Pat骨肌腱重建提供了修复重建的伸肌机制所需的机械支持，具有显着的功能性益处，可稳定活动性膝关节伸展并长期长期成功存活。证据级别III。结论从胫骨近端同种异体移植到受体残余pa骨肌腱的同种异体组织进行Pat骨肌腱重建提供了修复重建的伸肌机制所需的机械支持，具有显着的功能性益处，可稳定活动性膝关节伸展并长期长期成功存活。证据级别III。结论从胫骨近端同种异体移植到受体残余pa骨肌腱的同种异体组织进行Pat骨肌腱重建提供了修复重建的伸肌机制所需的机械支持，具有显着的功能性益处，可稳定活动性膝关节伸展并长期长期成功存活。证据级别III。