BACKGROUND Many studies that analyzed bone mineral density (BMD) and skeletal factors of hip fractures were based on uncalibrated radiographs or dual-energy xray absorptiometry (DXA). QUESTIONS/PURPOSES Spatial accuracy in measuring BMD and morphologic features of the femur with DXA is limited. This study investigated differences in BMD and morphologic features of the femur between two types ...

Hip fractures are the most serious complication of osteoporosis and are associated with high morbidity and mortality. Generally, patients who sustain osteoporotic hip fractures are older adults who have a number of comorbid diseases which predispose them to perioperative complications, disability and death. Furthermore, patients who survive a hip fracture are at higher risk of a subsequent frac...

The Western world is currently facing an “epidemic” in fractures of the proximal femur. Although the unexplained increase in the age specific incidence seems to have reached a plateau, absolute numbers will continue to rise because of the increasing number of elderly people in the population. Age alone, which inevitably brings a reduction in bone density, does not explain this phenomenon fully....

There are 2 distinct methods of cup navigation in total hip arthroplasty. One predicts orientation of the acetabulum through bony landmarks outside the acetabulum (eg, the anterior pelvic plane); its unreliability is well published. The other identifies acetabular center axis (ACA) and is patient-specific method that is independent of pelvic tilt, making it more reliable. Data from readily palp...

BACKGROUND Footwear-generated medio-lateral foot center of pressure manipulation has been shown to have potential positive effects on gait parameters of hip osteoarthritis patients, ultimately reducing maximum joint reaction forces. The objective of this study was to investigate effects of medio-lateral foot center of pressure manipulation on muscle activity of hip-spanning and back muscles dur...

The cause of hip osteoarthritis (OA) remains unclear, morphologic abnormality of hip was thought to be a contributing factor to hip OA. The hypothesis was that there were subtle anatomical morphology differences of the hip between normal and OA subjects; the objective of this study was to explore these anatomical differences which are predisposing to hip OA based on CT 3D reconstruction. Ninety...

In this investigation, we obtained data that support the hypothesis that afferent signals associated with hip flexion play a role in initiating the swing-to-stance transition of the hind legs in walking cats. Direct evidence came from observations in walking decerebrate cats. Assisting the flexion of the hip joint during swing advanced the onset of activity in ankle extensor muscles, and this a...

BACKGROUND Total hip arthroplasty involves division of the joint capsule, which can cause receptor damage, affecting postural stability and increasing the risk of falls. The aim of this study was to determine whether postural stability can be disturbed by total hip arthroplasty from a postero-lateral approach. MATERIAL AND METHODS Static balance was quantified with the use of a two plate tens...

2. Capsule afferents in the hip discharged only when the joint was rotated into its limit of movement along a single axis of rotation. 2. The optimal axis of rotation for an afferent was determined by the part of the capsule that was loaded by the rotation and by the location of the receptor in the capsule. Afferents were activated by rotations along the axes of abduction, adduction, and intern...