Abstract
Various types of tibial alignment guides exist, the results in performing the tibial resection in total knee arthroplasty (TKA) are more or less than we desired. In addition, it is difficult to estimate the accuracy of tibial component alignment with radiograph because it is difficult to get true frontal and lateral view. In this study, we use new tibial alignment guide and estimate tibial component alignment by using postoperative CT scan.
30 knees underwent TKA using an accelerometer-based, portable navigation device (KneeAlign 2) and postoperative CT scans were obtained. Postoperative CT scans of the lower limbs analysed by 3D digital template system (Athena), demonstrated that 96.6% of the tibial components were placed within 90°± 2°to the mechanical axis in the coronal plane, and 96.6% of the components were placed within 3°± 2°to the mechanical axis in the sagittal plane.
As a result of this study, an accelerometer-based, portable navigation device can expect to decrease outliers in tibial component alignment.
