A three-dimensional computer model of a total hip replacement was used to examine the relationship between the position of the components, the range of motion and the prosthetic joint contact area. Horizontal acetabular positions with small amounts of acetabular and femoral anteversion provide the largest contact areas, but result in limited joint movement. These data will allow surgeons to sel...

BackgroundPatellar instability is a considerable problem that leads to pain and anxiety during simple functional tasks. Femoral derotational osteotomy has become common surgical procedure improve patella mechanics, stability loading. However, it remains unclear if static (MRI measured) femoral anteversion sufficient capture the dynamic rotation walking represents good indication for procedure. ...

OBJECTIVES To evaluate morphological parameters of the femur, tibia, and patella in Toy Poodles with medial patellar luxation (MPL) using three-dimensional (3D) computed tomography (CT) and to compare these parameters between radiography and CT. METHODS Thirty-five hindlimbs of Toy Poodles were divided into normal and grade 2 and 4 MPL groups. The anatomical and mechanical lateral proximal fe...

We have observed damage to the labrum as a result of repetitive acetabular impingement in non-dysplastic hips, in which the femoral neck appears to abut against the acetabular labrum and a non-spherical femoral head to press against the labrum and adjacent cartilage. In both mechanisms anatomical variations of the proximal femur may be a factor. We have measured the orientation of the femoral n...

BACKGROUND Aseptic loosening and osteolysis commonly limit the survivorship of total hip prostheses. Retention of a well-fixed acetabular component, rather than full acetabular revision, has multiple advantages, but questions have lingered regarding the clinical success and prosthetic survivorship following this procedure. We examined the impact of acetabular component position, polyethylene ty...

Adequately shaped femoral plate is critical for the fixation of fracture in the pertrochanteric regions. Lateral aspect of greater trochanter is an important region where the proximal femoral plate anchored. However, little is known regarding the morphology of greater trochanter. The objective of this study was to measure main dimensions of greater trochanter and other regions in the proximal e...

Objectives: A subset of patients undergoing hip arthroscopy suffers from persistent pain and dysfunction which can be secondary to a number factors. Femoral rotational deformities are often overlooked and/or providers unsure when address femoral deformities. Currently, there is limited no data guiding surgeons consider osteotomy at the time for FAI. Through previously validated computer-assiste...

Both the pathogenesis and management of congenital dislocation of the hip are controversial topics, not least because of lack of agreement on what constitute the essential pathological features. Studies of necropsy material have been rare, and even when a pathological change can be identified it is often uncertain whether it represents a primary feature of the disease or a secondary consequence...