Hip joint Flashcards
What creates the hip joint?
Acetabulum and femoral head
What covers the acetabular notch inferiorly?
Transverse acetabular ligament
What connects the femur to the acetibulum?
Ligamentum teres
What increases the articulation of the hip joint?
Acetabular labrum
What is the area where the ligamentum teres inserts on the femur called?
Fovea
What does the transverse acetabular ligament cross?
The acetabular notch
Describe the architecture of the bone;
Femoral neck has an angle of 115-140 degrees - Increases mobility - Thickened bone to enhance load bearing through the neck.
Describe the landmark features of the femur;
Greater and lesser trochanter with intertrochanteric line.
Describe the femoral joint capsule;
The joint capsule originates from the acetabulum and inserts around the intertrochanteric line.
How does the fibrous capsule of the hip joint aid hip movement?
Fibres spiral around the joint tighten as the thigh extends and unwinds at the hip flexes. Thicker fibres form ligaments pull the femur medially into the acetabulum.
What are the ligaments of the hip?
Iliofemoral Pubofemoral Ischiofemoral Ligamentum teres
What do we need to know about the fibrous capsule?
3 parts, v strong, spiralled, prevents dislocation.
What arteries supply the hip joint?
Medial and lateral circumflex arteries, come of the profunda femoris art.
Describe the arterial supply of the femoral neck;
The medial circumflex runs posteriorly, the lateral circumflex runs anteriorly around the femoral neck to form an anastomoses. Retinacular arteries come off the circumflex and run in the retinacular folds of the synovial membrane up the femoral head. Supply the femoral head and neck.
Whats the clinical implications of the femoral neck supply?
Trauma, osteoporosis and tumour can lead to femoral neck fractures. A subcapital fracture can disrupt blood supply to the femoral head. = tissue necrosis. A more distal intertrochanteric fracture can leave the blood supply intact.
