![]() ![]() SummaryĪll the structures described contribute to making the hip stable. This laxity means that the femoral head moves more within the socket and can also contribute to the uneven stress on the hip joint. This means that joints have a greater range of movement than normal because the ligaments and joint capsule are lax (loose). Up to 50% of people with hip dysplasia can also have joint hypermobility. However, studies show that up to 50% of people can have labral tears without any symptoms. The labrum has many nerve endings within it which can contribute to increased pain when it initially tears. Eventually, it can become torn from taking the extra load. In a hip with dysplasia, there is increased movement of the ball in the socket due to lack of bone support, the labrum becomes thickened and inflamed to try and support the femoral head better. It helps provide further stability and a suction seal. The labrum is a horse-shoe shaped ring of cartilage which sits around the rim of the hip socket. The stronger the muscles are, the better the hip joint is supported. Muscles: Strong muscles surround the hip joint, and need to work in the correct muscle pattern to absorb and dissipate forces and reducealtered shearing patterns.The joint capsule: A strong and dense fibrous sac that surrounds the hip joint.Ligaments: Connect 2 bones together to provide further stability.Labrum: Ring of cartilage, which sits around the rim of the hip socket.Cartilage: Connective tissue covering the surface of the joint.The shape of the bones: The femoral head and the acetabulum.The stability of the hip joint relies upon the following structures: In very severe cases the ball can come out of the socket (dislocate). Ultimately there is a mismatch in the fit of the ball into the hip socket, meaning that the femoral head is not held tightly in place and therefore increased movement (shearing) occurs. ![]() It is a condition where the hip joint has not developed properly and this can affect the shape of the bones, the orientation of the ball or socket, or all the above. Developmental Dysplasia of the hip (DDH) is an umbrella term used to describe various bony abnormalities which result in poor containment of the ball of the hip (femoral head) within the hip socket (acetabulum). ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |