Clinical Outcomes Following the Use of Constrained Condylar Knees in Primary Total Knee Arthroplasty.

Background: Certain clinical or adverse intraoperative situations require the use of increased constraint in primary total knee arthroplasty (TKA). These include significant angular deformities causing incompetent collateral ligaments, or inadvertent intraoperative injury to collateral structures as well as the inability to achieve a balanced flexion and extension gap. Clinical success has been described with the use of constrained condylar knee arthroplasty in the primary setting in these situations.

Comparison of Revision Rates of Non-modular Constrained Versus Posterior Stabilized Total Knee Arthroplasty: a Propensity Score Matched Cohort Study.

Background: Attaining stability during total knee arthroplasty (TKA) is essential for a successful outcome. Although traditional constrained total knee prostheses have generally been used in conjunction with intramedullary stems, some devices have been widely used without the use of stems, referred to as non-modular constrained condylar total knee arthroplasty (NMCCK).

Questions/purposes: The aim of this study was to compare revisions rates after total knee replacement with a non-modular constrained condylar total knee (NMCCK) compared to a posterior-stabilized (PS) design.

Hip dislocation increases roughness of oxidized zirconium femoral heads in total hip arthroplasty: an analysis of 59 retrievals.

The aims of this study were to assess damage on the surface of retrieved oxidized zirconium (OxZr) metal femoral heads, to measure surface roughness of scratches, and to evaluate the extent of surface effacement using scanning electron microscopy (SEM). Ceramic zirconia-toughened alumina heads were analyzed for comparison. OxZr femoral heads explanted for recurrent dislocation had the most severe damage (P<0.

Effect of immediate postoperative portable radiographs on reoperation in primary total knee arthroplasty.

Cost-containment strategies are of increasing importance in total knee arthroplasty (TKA). Obtaining immediate postoperative radiographs following primary TKA is common practice, but their usefulness is controversial. The goal of this study was to evaluate the effect of immediate postoperative radiographs on reoperation within 60 days, assess film quality, and determine the cost associated with these radiographs.

Missed locked posterior shoulder dislocation with a reverse Hill-Sachs lesion and subscapularis rupture.

We report the case of a patient who sustained a missed locked posterior shoulder dislocation with a sizable anterior impression fracture and a concomitant acute rupture of the subscapularis tendon. Despite compromise of the tendon, a transfer of the lesser tuberosity into the humeral head defect along with suture anchor repair of the subscapularis was performed. Within 6 months, the patient regained near complete function of his shoulder with no episodes of instability.

Kinematic evaluation of the step-up exercise in anterior cruciate ligament deficiency.

Background: Step-up exercise is one of the most commonly utilized exercises during rehabilitation of patients after both anterior cruciate ligament (ACL) injury and reconstruction. Currently, insurance providers increasingly required a trial of intensified rehabilitation before surgical reconstruction is attempted. The purpose of this study was to investigate whether this "safe" rehabilitation exercise in the setting of ACL deficiency can cause altered knee kinematics.