Purpose. To describe a reliable method of predicting native joint line and posterior condylar offset (PCO) using true lateral digital radiographs of the distal femur. Methods. PCO was measured relative to a line drawn parallel to the posterior cortex of the distal femur and the joint line was measured from the posterior condylar flare to the articular surface. A ratio was then calculated for th...

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BACKGROUND Variation in anterior femoral cortex morphology can cause improper component placement and alignment. When surgical inaccuracies occur, the mechanical properties of the distal femur may be altered, which could result in lower surgical success rates and an increased chance of postoperative complications. QUESTIONS/PURPOSES The purpose of the study is to come up with a reproducible c...

Our purpose was to determine the mechanism which allows the maximum knee flexion in vivo after a posterior-cruciate-ligament (PCL)-retaining total knee arthroplasty. Using three-dimensional computer-aided design videofluoroscopy of deep squatting in 29 patients, we determined that in 72% of knees, direct impingement of the tibial insert posteriorly against the back of the femur was the factor r...

The objective of this study is to explain mathematically the effect of curvature of horizontal balancing condylar path on that of tooth path. Conclusions from the calculation are; 1. Curvature of tooth path increases similar to that of horizontal balancing condylar path. 2. The relation of curvature between horizontal balancing condylar path and tooth path is hardly affected, even if the direct...

T here are few more compelling issues in orthodontics than the relationship between orthodontic treatment and the status of the temporomandibular joint (TMJ). A focal point is the position of the condyle. Interest in calndylar position has been stimulated and reinforced possibly by two interrelated opinions concerning the cause of an internal derangement. One is that posterior condylar position...

PURPOSE Because condylar positioning after sagittal split ramus osteotomy of the mandible has been known to affect postoperative skeletal stability, accurate positional assessment of the temporomandibular joint after orthognathic surgery is vital to maximize stability of the surgery. The purpose of this study was to evaluate condylar changes after single-jaw and double-jaw surgeries in mandibul...

BACKGROUND AND OBJECTIVES The Influence of the loss of teeth on the condylar position and on temporomandibular joint (TMJ) dysfunction syndrome remains a c ontroversial issue. This study analyses the condylar position by means of a tomogram in partially dentate subjects which serves as a guide to predict which of the partially dentate statuses is prone to develop TMJ dysfunction syndrome in per...

The aim of this study was to address, in normal knees, the variability of posterior offset of femoral condyles and tibial slope, and the presence of any correlation between the two that might be needed to achieve an adequate joint motion in flexion. Magnetic resonance images of normal knees of 80 subjects, 45 males and 35 females, with a mean age of 38.9 years, were analysed. Measurements were ...