Objective: To summarize the principle, classification, and treatment methods of knee extension device disruption after total knee arthroplasty (TKA).
Methods: By extensively consulted the relevant domestic and abroad literature, the principle, classification, and treatment methods of injury according to different parts of the knee extension device after TKA were summarized and analyzed.
Results: The knee extension device disruption after TKA mainly occurs in the quadriceps tendon, patella tendon, and patella. Once the knee extension device is injured, it will seriously affect the functional recovery of the patient after surgery, resulting in delayed knee extension, limited range of motion, difficulty walking, and joint pain, etc. The current treatment methods are diverse, including conservative treatment and surgical treatment. Surgical treatment includes direct suture repair (traditional perosseous fixation and suture anchoring techniques), reconstruction and reinforcement repair (reconstruction using synthetic patches, autografts, and allografts). For the treatment of different parts, it is necessary to comprehensively consider the patient's knee joint tissue condition, the presence or absence of underlying diseases, and the presence or absence of donors.
Conclusion: There is no uniform conclusion on the treatment of knee extension device disruption after TKA. Different injury situations need to be considered comprehensively to choose the appropriate treatment method.
目的: 对全膝关节置换术（total knee arthroplasty，TKA）后伸膝装置损伤的原理、分型及治疗方法进行总结。.
方法: 广泛查阅国内外相关文献，按照 TKA 术后不同部位伸膝装置损伤总结分析损伤原理、分型和治疗方法。.
结果: TKA 术后伸膝装置损伤主要发生在股四头肌肌腱、髌腱和髌骨，伸膝装置一旦损伤，将严重影响术后患者功能恢复，导致伸膝迟滞、活动范围受限、行走困难和关节疼痛等。目前治疗方法多样，包括保守治疗和手术治疗，手术治疗包括直接缝合修复（传统经骨固定和缝线锚钉技术）、重建和加强修复（使用合成补片、自体移植物和同种异体移植物重建）。对于不同部位伸膝装置损伤的治疗需要综合考虑膝关节组织情况、有无基础疾病以及有无供体等方面。.
结论: TKA 术后伸膝装置损伤的治疗方法尚无统一定论，对于不同损伤情况需要综合考虑，选择合适的治疗方法。.
Keywords: Total knee arthroplasty; disruption; knee extension device; treatment method.