Abstract
Total knee arthroplasty (TKA) following high tibial osteotomy (HTO) is a challenging operation due to deformation of the proximal tibia and an altered soft tissue balance. We have experienced 3 patients required early revision TKA because of loosening of a tibial component. The purpose of this study was to clarify the cause of early loosening of the tibial component in TKA following HTO.
Thirteen patients who underwent TKA following HTO were included in this study. Three cases with early loosening of the tibial component were retrospectively compared with 10 controls without loosening. There were no significant differences in preoperative deformity of the proximal tibia, surgical procedures, and postoperative component fixation angles between the groups. All cases with early loosening of the tibial component were used minimally invasive surgery (MIS) tibial component, whereas no loosening was found in conventional components.
It has been reported that some tibial components for MIS TKA are beneficial for avoiding interference with the lateral cortex. However, we have experienced 3 patients required early revision TKA because of loosening of a MIS tibial component. It is concluded that early loosening might be caused by insufficient fixation resulting from the design of the MIS component itself.
