What is the maximum length of neck of femur?
What is the maximum length of neck of femur?
The anterior neck length of femur ranged from 20 to 40 mm with the mean of 28.8 mm. The anterior neck length of right femur ranged from 20 to 38 mm with a mean of 28.8 mm and that of left femur ranged from 21 to 40 mm with the mean of 28.8 mm. The NSA ranged from 115° to 140° with the mean of 127.21°.
What is a fractured femoral head?
Fracture of the femoral head is a severe, relatively uncommon injury; typically, it occurs following traumatic posterior dislocation of the hip joint. The Pipkin classification is the most commonly used classification system.
What causes a femoral head fracture?
The classic mechanism of injury for femoral head fracture is traumatic posterior dislocation of the hip . Shear forces against the femoral head as it exits the contained acetabulum are thought to cause the femoral head fracture during hip dislocation .
What causes COXA Vara?
The most common cause of coxa vara is either congenital or developmental. Other common causes include metabolic bone diseases (e.g. Paget’s disease of bone), post-Perthes deformity, osteomyelitis, and post traumatic (due to improper healing of a fracture between the greater and lesser trochanter).
How do you measure a femoral neck length?
Femoral neck length (NL) was defined as the distance from the cross point (B) of the shaft axis and central axis of the femoral neck (AC) to the head center (C) measured along the central axis of the femoral neck.
What is COXA Valga?
Coxa valga (KAHKS-uh VAL-guh) is a deformity of the femur, the upper thighbone that sits in the socket of the hip. hip deformity in which the angle between the shaft of the thighbone (femur) and the top of the thighbone is too great.
Can you walk on a fractured femoral head?
If you sustain a femoral head fracture, you will usually not be able to walk on your leg due to pain. You will likely be taken to an emergency room for evaluation. At the emergency room, you will have x-rays and/or a CT scan taken of your hip and pelvis.
How is a femoral head fracture treated?
Treatment is typically an emergency surgery that includes the reduction of the dislocated hip under anesthesia. In most cases, it also includes the fixation or removal of the fractured fragment of the femoral head. As a rule, the earlier the reduction, the better the outcome.
How do you know if you have coxa vara?
Coxa vara usually presents with a limp, a leg length difference, and limited ability to bring the thigh out to the side. X-rays are used to diagnose coxa vara. Depending on what caused the condition and how severe the deformity, reconstructive surgery may be needed to improve the hip alignment and biomechanics.
How do you fix coxa vara?
Correction of coxa valga is a varus osteotomy of the femur. The normal NSA of the femur is 130 degrees. Valgus angles (greater than 135 degrees) put the patient at risk of hip subluxation (dislocation). Treatment involves a pelvic osteotomy combined with varus osteotomy at the upper femur.
How wide is the femoral neck?
observed that there was a positive correlation between the length and width of the femoral neck and found measurements of 36.6 mm and 39.1 mm for the widths in 1950 and 1990, respectively.
Is the femoral head part of the trunnion?
The Femoral Head also forms a junction with the Femoral Stem (the Trunnion). Technically there is motion at both ends of the femoral head (even though motion at the trunnion would ideally not occur) and thus both are important to consider as sources of wear debris.
What are the benefits of a larger femoral head?
A larger head increases stability for two reasons. A larger head increases the head-neck ratio (diameter of the femoral neck vs the femoral head… the neck diameter never changes). A larger head-neck ratio means a larger arc of motion before impingement (eventually the neck will impinge on the rim of the socket).
Where does the pain in the femoral head come from?
The rectus tendon insertion on the pubis seems to be the primary site of pathology. Most patients describe a hyperextension injury in association with hyperabduction of the thigh. The location of the pain suggests that the injury involves both the rectus abdominis and adductor longus muscles.
What kind of liner does a femoral head use?
The Co-Cr femoral head can articulate with a metal liner (hard on hard bearing) or with a polyethylene liner (hard on soft bearing).