Intraoperative mobile-bearing movement in Oxford unicompartmental knee arthroplasty.

Purpose: Mobile-bearing Oxford unicompartmental knee arthroplasty has been used widely and successfully; however, there is no previous research on the intraoperative bearing movement. The purpose of this study was to characterise intraoperative bearing movement and investigate whether bearing movement relates to component positions, bearing size, intraoperative rotational kinematics and clinical results.

Methods: A trial tibial component, which was scaled every 2 mm, was used to measure the intraoperative movement of the mobile bearings.

The Relationship between Soft-Tissue Balance and Intraoperative Kinematics of Guided Motion Total Knee Arthroplasty.

A new design of the so-called "guided-motion" total knee arthroplasty (TKA) is expected to produce normal-like kinematics. The implant behaves strictly as a mechanically constraint-guided motion system. However, no previous reports have demonstrated the most appropriate surgical technique or soft-tissue balance that would reproduce ideal kinematics.

Bone-Patellar Tendon-Bone Autograft versus Hamstring Tendon Autograft for Anatomical Anterior Cruciate Ligament Reconstruction with Three-Dimensional Validation of Femoral and Tibial Tunnel Positions.

The purpose of this retrospective study was to first compare the clinical outcome of anatomical double-bundle (DB) anterior cruciate ligament reconstruction (ACLR) with hamstring tendon (HT) autografts and anatomical rectangular tunnel ACLR with bone-patellar tendon-bone (BPTB) autografts. Secondly, we aimed to demonstrate the quantitative locations of the femoral and tibial tunnel apertures using postoperative three-dimensional computed tomography (3D CT). Twenty-five patients underwent anatomical rectangular tunnel ACLR using BPTB grafts (Group B) and 23 patients underwent anatomical DB ACLR using HT grafts (Group H).

Effects of initial graft tension on femoral tunnel widening after anatomic anterior cruciate ligament reconstruction using a bone-patellar tendon-bone graft.

Introduction: The effects of initial graft tension upon tunnel widening (TW) following anatomic anterior cruciate ligament (ACL) reconstruction have not been elucidated. The purpose of this study was to retrospectively investigate the effect of two different graft-tensioning protocols upon femoral TW following anatomic ACL reconstruction using a bone-patellar tendon-bone (BPTB) graft and a three-dimensional (3D) computed tomography (CT) model.

Methods: Forty-three patients who underwent isolated ACL reconstruction using BPTB grafts were included in this study.

Impingement of the Mobile Bearing on the Lateral Wall of the Tibial Tray in Unicompartmental Knee Arthroplasty.

Background: Tilting of the mobile bearing relative to the tibial tray in the flexion position may result from the implantation of femoral components more laterally relative to tibial components during unicompartmental knee arthroplasty (UKA) using the Oxford Knee. The purpose of the present study was to compare femoral component positions after UKA using the phase 3 device and a novel device. We further evaluated the placement of the femoral components with the new device in the flexion position to determine the association with short-term prognosis.