Research progress on coverage and rotation of tibial component of Oxford unicompartmental knee arthroplasty

Abstract

The placement of the tibial component is critical on the effect of Oxford mobile-bearing unicompartmental knee arthroplasty (OUKA). On the one hand, the coverage of tibial component is one of the factors affecting the clinical outcome. Overhang of tibial component can cause the damage to the medial collateral ligament and irritate the surrounding soft tissue, while underhang may easily lead to some complications such as subsidence and loosening of tibial component due to the lack of the support of the medial cortex. Both of them cause an adverse effect on the clinical result and postoperative function of the patients. Rotation of the tibial component has also been shown to associate with postoperative function in patients. From the perspective of surgery, the vertical cut on the tibial plateau is the decisive procedure affecting the placement of the tibial component, thus affecting the coverage and rotation of the tibial component. In previous studies and the clinical practices, it is found that, according to the direction and position of the standard vertical cut by Oxford, the tibial component of some patients could not cover perfectly, and the rotations of the tibial component are various. The investigation of the influence of Oxford standard vertical cut on the coverage and rotation of the tibial component, and whether there is a relationship between the coverage and rotation of the tibial component, may play a positive role in guiding surgeons to get better results of Oxford mobile-bearing unicompartmental knee arthroplasty. \n \n \nKey words: \nArthroplasty;\xa0replacement, knee;\xa0Rotation;\xa0Tibia