The medial gap is a reliable indicator for intraoperative soft tissue balancing in posterior-stabilized total knee arthroplasty.

Background: Appropriate soft tissue balance and accurate alignment are important for successful total knee arthroplasty (TKA). However, the optimal technique for establishing and measuring soft tissue balancing remains unclear. The aim of this study was to analyze the intraoperative medial and lateral gap pattern using digital knee balancer in posterior-stabilized (PS) TKA.

Large osteochondral defect in the lateral femoral condyle reconstructed by Atelocollagen-associated autologous chondrocyte implantation combined with anterior cruciate ligament reconstruction.

Background: Articular surface damage commonly associated with rupture of the anterior cruciate ligament (ACL). Large osteochondral defect, which consists of a severe depression fracture and a large cartilage defect, need to be treated due to deformation of the articular surface as it can impact the clinical outcome of ACL reconstruction. Although autologous chondrocyte implantation is one of the useful options in such cases, it can be questioned whether the reconstruction of the ACL and osteochondral defect should be performed in one procedure alone.

In vivo kinematic analysis of posterior-stabilized total knee arthroplasty for the valgus knee operated by the gap-balancing technique.

Background: Most in vivo kinematic studies of total knee arthroplasty (TKA) report on the varus knee. The objective of the present study was to evaluate in vivo kinematics of a posterior-stabilized fixed-bearing TKA operated on a valgus knee during knee bending in weight-bearing (WB) and non-weight-bearing (NWB).

Methods: A total of sixteen valgus knees in 12 cases that underwent TKA with Scorpio NRG PS knee prosthesis and that were operated on using the gap balancing technique were evaluated.

Reduction of initial tension in the in situ frozen anterior cruciate ligament.

The purposes of this study were to develop a new method to measure in situ tension in the anterior cruciate ligament, and to show degradation changes in the tension applied to the in situ frozen-thawed anterior cruciate ligament during a 12-week period postoperatively. Eighteen mature Beagles were used in the current study. Each dog had the in situ freeze and thaw treatment to its anterior cruciate ligament, and an initial tension of 20 N was applied to the anterior cruciate ligament.

Implantation sites and fiber diameters affect the rate of degradation in absorbable polydioxanone fibers.

Purpose: The purpose of this study is to test the question of whether implantation sites and fiber diameters affect the rate of degradation in absorbable polydioxanone fibers.

Type Of Study: Randomized trial.

Methods: Forty-eight mature rabbits were used.