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Chandler's disease, also known as idiopathic avascular osteonecrosis of the femoral head (ANFH or ONFH), is a rare condition in which the bone cells in the head of the femur (FH) die due to lack of blood. This disease is caused when blood flow is reduced to the part of a bone near a joint.
Avascular necrosis; Other names: Osteonecrosis, [1] bone infarction, [2] aseptic necrosis, [1] ischemic bone necrosis [1] Femoral head showing a flap of cartilage due to avascular necrosis (osteochondritis dissecans). Specimen removed during total hip replacement surgery. Specialty: Orthopedics: Symptoms: Joint pain, decreased ability to move ...
The pathology of avascular necrosis followed by revascularization and bony remodeling of the femoral head in the dog certainly suggests a vascular etiology, though the cause of the condition is not completely understood. [40] Hip pain is usually seen by the age of 6 to 8 months. [41] The disease is bilateral in 12–16% of cases. [42]
Dysbaric osteonecrosis or DON is a form of avascular necrosis where there is death of a portion of the bone that is thought to be caused by nitrogen (N 2) embolism (blockage of the blood vessels by a bubble of nitrogen coming out of solution) in divers. [1] Although the definitive pathologic process is poorly understood, there are several ...
A SCFE is an orthopaedic emergency, as further slippage may result in occlusion of the blood supply and avascular necrosis (risk of 25 percent). Almost all cases require surgery, which usually involves the placement of one or two pins into the femoral head to prevent further slippage. [12]
The superior-lateral coverage of the femoral head. >20° (<55 years old) [notes 2] <24° (>55 years old) [notes 2] >40° indicates overcoverage; Reimer's migration index [9] The percentage of the femoral head that lies outside of the acetabular roof. It is also called the femoral extrusion index. <25% Tönnis angle
The medial femoral circumflex artery (with its branches) supplies arterial blood to several muscles, including: the adductor muscles of the hip, gracilis muscle, [1] [3] pectineus muscle, [3] and external obturator muscle. [1] It delivers most of the arterial supply to the femoral head and femoral neck via branches - the posterior retinacular ...
Zones of a hip prosthesis, by the DeLee and Charnley system, [1] and the Gruen system. [2]After hip replacement, hip prosthesis zones are regions in the interface between prosthesis material and the surrounding bone.