Objective The aim of this study was to describe an alternative method for trochleoplasty, semi-cylindrical recession trochleoplasty (SCRT), and compare it to trochlear block recession (TBR) in regard to recessed trochlear depth, patellar depth, patellar articular contact with the trochlea, recessed trochlear surface area, procedure time, complications and functional outcome.

Study Design Ten dogs with bilateral grade II-III medial patellar luxations underwent bilateral simultaneous correction surgery including tibial tuberosity transposition, lateral imbrication and trochleoplasty with one stifle each undergoing TBR and SCRT. Patients received pre-and postoperative stifle computed tomography scans and pre- and 8-week postoperative pressure platform analysis and physical examinations. Recessed trochlear depth, patellar depth, trochlear surface area, patellar articular contact, procedure time, complications and functional outcomes as measured by gait analysis were compared between the two techniques.

Results There was no significant difference in measured outcome variables between techniques at any time point. At the time of the 8-week reassessment, no patella had reluxated.

Conclusion Short-term follow-up shows similar functional outcomes between both techniques regarding rate of reluxation and limb function. The SCRT was subjectively easier to perform than TBR, particularly in small patients. The SCRT is an acceptable method of trochleoplasty for the treatment of medial patellar luxation in dogs and further studies evaluating long-term outcomes are justified.

目的 本研究的目的是描述滑车成形术的替代方法，半圆柱后退滑车成形术 (SCRT)，并将其与滑车阻滞后退 (TBR) 在滑车后退深度、髌骨深度、髌骨与滑车的关节接触方面进行比较。 , 凹陷滑车表面积、手术时间、并发症和功能结果。

研究设计 10 只双侧 II-III 级内侧髌骨脱位的狗接受了双侧同步矫正手术，包括胫骨结节移位、外侧覆瓦和滑车成形术，每个膝关节均接受 TBR 和 SCRT。患者接受了术前和术后窒息计算机断层扫描以及术后前和术后 8 周的压力平台分析和体格检查。通过步态分析测量的滑车凹陷深度、髌骨深度、滑车表面积、髌骨关节接触、手术时间、并发症和功能结果在两种技术之间进行了比较。

结果 在任何时间点，不同技术之间测量的结果变量没有显着差异。在 8 周重新评估时，没有髌骨脱位。

结论 短期随访显示两种技术在复位率和肢体功能方面的功能结果相似。主观上，SCRT 比 TBR 更容易执行，尤其是在小患者中。SCRT 是一种可接受的滑车成形术治疗犬内侧髌骨脱位的方法，进一步研究评估长期结果是合理的。