Department of Orthopaedic Surgery and Joint Surgery Centre, Takatsuki General Hospital, Takatsuki, Japan.
Clin Orthop Surg. 2021 Mar;13(1):123-126. doi: 10.4055/cios20277. Epub 2021 Feb 15.
In Oxford unicompartmental knee arthroplasty, the relationship between the mobile bearing and the vertical wall of the tibial tray is important in preventing bearing dislocation. Separation of the bearing from the vertical wall can cause spinning of the bearing with an increased risk of subsequent dislocation. We report on intraoperative adjustment of the tibial tray performed to prevent the bearing from spinning. After tibial and femoral bone cutting and adjustment of the flexion and extension gap, the trial bearing is inserted and the bearing-vertical wall distance is evaluated before the preparation using the tibial template and bearing trial. In the case of separation, it can be resolved by medialization with or without rotational adjustment. The technique is useful and can be easily performed, it is therefore recommendable for all cases of Oxford mobile-bearing unicompartmental arthroplasty.
在牛津单髁膝关节置换术中，活动衬垫与胫骨托的垂直壁之间的关系对于防止衬垫脱位很重要。衬垫与垂直壁分离会导致衬垫旋转，从而增加随后脱位的风险。我们报告了术中对胫骨托进行的调整，以防止衬垫旋转。在进行胫骨和股骨截骨以及屈伸间隙调整后，插入试模衬垫，并在使用胫骨模板和试模准备之前评估衬垫-垂直壁距离。如果存在分离，可以通过内侧化或同时进行旋转调整来解决。该技术很有用，并且易于操作，因此推荐在所有牛津活动衬垫单髁膝关节置换术中使用。
