Clinical characteristics and therapeutic strategy of hyperextension bicondylar tibial plateau fracture // Du Shouchao,Wang Xin, Zhang shimin, Hu sunjun, Xiong wenfeng, Chen shiyi ( Department of Orthopedic Surgery, Yangpu Hospital, Tongji University School of Medicine, Shanghai, 200090 ) Abstract：[Objective] To discuss the clinical characteristics and the therapeutic strategy of the hyperextension bicondylar tibial plateau fracture. [Methods] A retrospective analysis of 11 cases of hyperextension bicondylar tibial plateau fractures from January 2015 to June 2018 was performed. All patients were treated with posteromedial and anterolateral approach for open reduction and internal fixation. Of them, 8 males and 3 females aged (58.24±6.18) years on average. All patients had no significant vascular or nerve injury. Follow-up observations were made on fracture healing, improvement of posterior tibial slope angle and lower limb alignment, functional recovery and complications. [Result] All patients were successfully completed the operation with operation time of (97.25±11.64)min, and followed up for (18.31±6.12) months. All patients received bone healing, and the average healing time was (137.42 ± 18.74) days. There was no joint surface collapse and varus or valgus deformity. The mean tibial plateau posterior tibial slope of all patients was (8.63±1.15)° within one week and (8.05±1.30)°12 months after operation. There was no significant difference between the two groups (P > 0.05). At the last follow-up, all patients had an average VAS score of 1.18±0.98，the knee range of motion (ROM) of (122.64±11.89)°. The HSS score was excellent in 6 cases, good in 3 cases, and fair in 2 cases, and The average HSS score was 82.18±7.90. [Conclusion] The hyperextension bicondylartibial plateau fracture is a special type of fracture whose posterior tibial slope disappears or becomes negative. The most important treatment is to restore the posterior tibial slope, lower limb alignment and joint surface smoothness, and pay attention to the evaluation of knee stability during the operation.