Superior acetabular11/12/2023 ![]() ![]() The iliofemoral, pubofemoral and ischiofemoral ligaments are very strong, and along with the thickened joint capsule, provide a large degree of stability. The increase in depth provides a larger articular surface, further improving the stability of the joint. There is a horseshoe shaped fibrocartilaginous ring around the acetabulum which increases its depth, known as the acetabular labrum. This decreases the probability of the head slipping out of the acetabulum (dislocation). It is deep, and encompasses nearly all of the head of the femur. There are a number of factors that act to increase stability of the joint. The primary function of the hip joint is to weight-bear. It has a spiral orientation, and prevents hyperextension and holds the femoral head in the acetabulum.Ischiofemoral– spans between the body of the ischium and the greater trochanter of the femur, reinforcing the capsule posteriorly. ![]() It has a triangular shape, and prevents excessive abduction and extension.Pubofemoral – spans between the superior pubic rami and the intertrochanteric line of the femur, reinforcing the capsule anteriorly and inferiorly.It is the strongest of the three ligaments. It has a ‘Y’ shaped appearance, and prevents hyperextension of the hip joint.Iliofemoral ligament – arises from the anterior inferior iliac spine and then bifurcates before inserting into the intertrochanteric line of the femur.There are three main extracapsular ligaments, continuous with the outer surface of the hip joint capsule: It encloses a branch of the obturator artery (artery to head of femur), a minor source of arterial supply to the hip joint. It is a relatively small structure, which runs from the acetabular fossa to the fovea of the femur. The only intracapsular ligament is the ligament of head of femur. They can be divided into two groups – intracapsular and extracapsular: The ligaments of the hip joint act to increase stability. ![]()
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |