Left Acetabular Roof

Fractures occur in a bimodal distribution.

Left acetabular roof.

2012 farlex inc. If the acetabulum is not well reduced or maligned or sometimes even if the surgeon is able to achieve the reduction and the alignment the cartilage coating the joints has been badly damaged and degenerates which is arthritis. The angle is formed by a horizontal line connecting both triradiate cartilages hilgenreiner line and a second line which extends along the. A deep semispherical socket cavity in the lateral surface of the hip with which the femoral head articulates located at the convergence of the ilium ischium and pubis.

Contributing a little more than two fifths of the structure is the ischium which provides lower and side boundaries to the acetabulum the ilium forms the upper boundary providing a little less than two fifths of the structure of the acetabulum. An acetabular fracture is a break in the socket portion of the ball and socket hip joint. It shows up on a medical imaging study such as an x ray as a point of increased density and is believed to be caused by overproduction of bone or cartilage cells. August 17 2020.

There are three bones of the os coxae hip bone that come together to form the acetabulum. A bone island is a benign growth of bone or cartilage inside a bone usually within the marrow. The rest is formed by the pubis near the mid. The acetabulum is functionally comprised of two columns anterior and posterior and two walls anterior and posterior.

Mary mcmahon last modified date. It is most useful in patients who have started to ossify the epiphysis since ossification diminishes the usefulness of ultrasound. The acetabular angle is a radiographic measurement used when evaluating potential developmental dysplasia of the hip ddh. The addition of oblique views of the affected hip may be necessary to evaluate the anterior and posterior columns of the acetabulum.

A benign cause of a lytic bone lesion is a solitary bone cyst as noted on the norwich image interpretation course. This occurs in people under 30 and typically appears in the long arm bone or the humerus. Sems m d an orthopedic trauma surgeon at mayo clinic s campus in rochester minnesota. Sbcs were first discovered in 1940s but doctors are still uncertain about the reasons they form.

The majority of acetabular fractures are caused by some type of high energy event such as a car collision. High energy trauma in younger patients e g motor vehicle accidents low energy trauma in elderly patients e g fall from standing height pathoanatomy. Sbcs occur in the subchondral bone which is the layer of bone right under cartilage. The acetabulum is an articular surface it articulates with the femoral head says stephen andy a.

If an acetabular fracture is identified a ct scan is suggested to assess the position of the fracture fragments and to exclude intra articular loose bodies.