What are the chances of a femoral neck fracture that can still cause necrosis of the femoral head af

Femoral head necrosis is usually possible within 5 years after a femoral neck fracture**. The probability of occurrence is only statistically significant, there is no specific data, and it can only be said that it has a certain proportional relationship with the high age, the severity of the injury, the location of the fracture line and the ** plan chosen. The older the age, the more prone to necrosis, the location of the fracture line will also affect the possibility of femoral head necrosis, young people, middle-aged people and the elderly femoral neck fracture surgical options are also different, and the selection of inappropriate surgical plans will also lead to an increased possibility of femoral head necrosis.

In general, after a femoral neck fracture**, it is necessary to have regular reexaminations within 5 years so that signs of femoral head necrosis can be detected in time and can be treated in time, and in the case of children or young adults, the observation time should be longer.

Avascular necrosis of the femoral head after a femoral neck fracture is typically typical because it often occurs continuously during the recovery period from trauma.

deep tenderness, localized deep tenderness at the midpoint of the groin and posterior piriformis muscle, and adductor insertion tenderness due to adductor muscle tension;

Hip dysfunction:"4"positive word test, positive Thomas's sign, abduction, external rotation, internal rotation, and significantly limited flexion activity;

due to limb shortening due to femoral head collapse, positive Ellis's sign, positive Tedrenberg's test;

significant disuse amyotrophy;

Longitudinal axis percussion pain of the affected limb is positive when intramedullary pressure is high, intraarticular pressure is high, or dead bone resorption repair reaches the articular surface.

It is recommended to pay attention to the maintenance of the femoral head in daily life, and avoid weight bearing, trauma, hormones, alcohol, etc.

Femoral neck fractures are the most common injury to the hip and are second only to distal flexure fractures in generalized fractures. This type of fracture is mostly caused by accidentally falling while walking, hitting the buttocks on the ground, and suffering from hip pain after the injury, unable to stand and walk. Femoral neck fractures in young people are often caused by intense violence such as car accidents or falls from heights.

Most femoral neck fractures have a more significant displacement than the fracture, and because of the greater leverage in this area, the fracture is unstable, so most require surgery**. After femoral neck fracture surgery, there are generally three hurdles: first, postoperative infection, which most patients can pass, generally about 10 days; Most of the patients are middle-aged and elderly, so it usually takes about 3 months to 1 year, and the older the age, the more difficult it is to heal, and the non-union rate can reach about 30%.

The first two levels are more important to both doctors and patients, while the third level is the necrosis of the femoral head, which is often overlooked. The common clinical situation is: the reduction, internal fixation and healing of the femoral neck fracture after surgery are very smooth, and the doctors and patients are very satisfied, so they do not protect and move at will, which eventually causes necrosis of the femoral head and leaves lifelong regrets.

The risk of femoral head necrosis in femoral neck fractures is about 20-40%, and the risk factors are as follows:

1. Fracture site: The closer the femoral neck fracture is to the femoral head, the higher the probability of nonunion and necrosis of the femoral head;

2. Age: Femoral neck fractures in middle-aged and elderly patients are prone to nonunion, while femoral neck fractures in young adults are prone to necrosis of the femoral head;

3. Weight-bearing: premature abandonment of abduction is a common cause of necrosis of the femoral head;

4. Degree of dislocation and reduction quality: the femoral neck fracture is mild dislocation, the femoral head necrosis rate is moderate dislocation, and the severe is 51%, the better the reduction quality, the lower the incidence of femoral head necrosis.

To prevent necrosis of the femoral head should be done:

1. Review the X-ray frequently, even if the fracture is healed, it should be followed for 3 to 5 years. Studies have shown that about 85% of femoral head bad examinations, large ** collection deaths occur within 3 years of fracture, and 98% occur within 5 years. For the evaluation of femoral neck fractures** and the efficacy, fracture healing should not only be observed, but should be followed up to 5 years after injury.

If there are "nail marks" on the X-ray film, the high decline of the femoral head and the hardening of the zona pellucida indicate that there is a precursor to necrosis of the femoral head, and active measures should be taken to prevent it from further premature development;

2. It is not advisable to load weight too early. From the perspective of fracture healing, femoral neck fracture can basically bear weight after 12 weeks, but because of the late occurrence of necrosis of the femoral head, weight bearing should be reduced until 1 year;

3. If early necrosis of the femoral head is found, measures such as taking drugs and appropriate surgery should be taken to reverse the lesion.

Because the blood vessels of the femoral head are all around the femoral neck, it is easy to die.

After the fracture of the femoral neck, the blood vessels will be destroyed, and the blood vessels are all around the femoral neck, resulting in blood restriction**, resulting in ischemia of the femoral head and necrosis of the femoral head.

The femoral head supports our upper body, due to the long-term pressure of the upper body, although the fracture is recovered, it will also cause necrosis of the femoral head for a long time.

Because the bone is injured after a fracture, it is more susceptible to injury, and the bone is easy to die after being injured.

Because his injury to the femoral head is relatively close. So the damage will be relatively large. Therefore, you should pay attention to it in your daily life.

Femoral neck fractures are particularly prone to necrosis of the femoral head, the main reason is that after you are injured in the middle of this bone, you will find that its recovery is very slow, in this case, a special necrosis of the bone will be formed, then it is a very serious phenomenon.