BACKGROUND Treatment decision making for chondral defects in the knee is multifactorial. Articular cartilage pathology, malalignment, and meniscal deficiency must all be addressed to optimize surgical outcomes. PURPOSE To determine whether significant clinical improvements in validated clinical outcome scores are observed at minimum 2-year follow-up after articular cartilage repair of focal a...

Hip-to-ankle radiographs have been used to evaluate lower limb alignment before and after total knee arthroplasty. However, earlier studies have inappropriately used correlation to assess the reproducibility of the radiographs. We determined the reliability of the hip-to-ankle radiograph using the Bland-Altman analysis. Two consecutive hip-to-ankle radiographs were obtained in 52 patients (52 k...

Arthroplasty +Nam, D; Dy, CJ; Cross, MB; Lee, JH; Kim, S; Mayman, DJ Hospital for Special Surgery, New York, New York Senior Author: [email protected] PURPOSE: Total knee arthroplasty (TKA) has proven to be tremendously successful in the management of knee arthritis, but concerns still exist regarding component positioning, as a recent meta-analysis demonstrated 31.8% of TKAs performed with conve...

Malalignment of the knee can cause debilitating symptoms such as pain, resulting in a decline in function and mobility. Surgical options that exist to address this problem include realignment osteotomies and joint replacements. Realignment osteotomies are the more appropriate options in certain patient populations, especially with regard to age and level of activity. Since a high tibial osteoto...

A three-dimensional (3D) knee joint computational model was developed and validated to predict knee joint contact forces and pressures for different degrees of malalignment. A 3D computational knee model was created from high-resolution radiological images to emulate passive sagittal rotation (full-extension to 65°-flexion) and weight acceptance. A cadaveric knee mounted on a six-degree-of-free...

I n their study, Reijman et al (see page 158) report findings that show an association between an increased body mass index (BMI) and greater risk of both incident knee osteoarthritis and knee osteoarthritis progression, but no association between an increased BMI and risk of either incident or progressive hip osteoarthritis. These results confirm what previous studies—that is, studies that wer...

PURPOSE It is not clear how the knee extension torque is distributed quantitatively among the lateral and medial vasti in patellofemoral pain (PFP) patients with patellar malalignment, which was investigated in vivo and noninvasively in ten PFP patients and eleven controls. We hypothesized that the vastus medialis oblique (VMO) and vastus medialis longus (VML) of PFP patients contribute less to...

Joint loading has been implicated in the pathogenesis of knee osteoarthritis (OA). While compartment-specific measures such as the knee adduction moment have received much attention in the literature, less is known about other measures of dynamic loading in this patient population. This cross-sectional study assessed strength and walking patterns of 204 individuals with radiographically confirm...

Objective: To correlate parameters of implants with incidence of pain. Methods: 32 knees (31 patients) operated on between 2006 to 2008 in a serie of cases of TKA revision surgery were monitored for evidence of pain at the tip of the stem.In all we used uncemented stem Scorpio TS Total Knee ® Revision System (Stryker ®). Criteria assessed: pain in the leg or thigh without other causes, diameter...

Introduction: Clinically, malalignment of the knee has been shown to create altered joint contact loads, however, it is not understood how this affects longitudinal bone growth. Previous investigators have addressed this issue by applying static loads in a two-dimensional linear elastic finite element model (2). However, studies have shown that load passing through the knee is highly dependent ...