What Is Pseudarthrosis?

Bone nonunion is a common complication after fracture, also known as fracture nonunion. It is the fracture end that under certain conditions affects the fracture healing function to stop, and the fracture end has formed a pseudo joint.

Pseudo joint

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Bone nonunion is a common complication after fracture, also known as fracture nonunion. It is the fracture end that under certain conditions affects the fracture healing function to stop, and the fracture end has formed a pseudo joint.

A condition in which the pseudo-joint or fracture end reabsorbs and shrinks, which increases the fracture gap and does not heal without further treatment. X-ray pictures show that the fracture ends are separated from each other, the gap is large, the bone ends are hardened, the atrophy is loose, and the medullary cavity is closed. No matter how long it is fixed, it cannot be connected.
Fracture nonunion is a common complication of orthopedics, which occurs in middle-aged and elderly patients, especially elderly patients. Fractures of the femoral neck, femoral shaft, tibia and ankle are the sites where bone nonunion often occurs.

Because trauma and surgery have changed the body's original physiological structure and caused physiochemical damage, some patients may experience a variety of functional disorders and tissue damage, resulting in a series of pathological changes. According to clinical data, if a patient undergoes a major trauma, 400 grams of lean tissue can be lost per day, and its decomposition is greater than synthesis. Therefore, the patient is in a state of negative nitrogen during the initial stage of trauma and surgery.

There are many reasons for nonunion or delayed bone healing during fracture treatment, such as irrational internal and external fixation of bone, premature out-of-bed weight bearing, improper exercise of the patient, or debridement, which will crush bone The bone defect caused by improper resection of the film is related to poor alignment of the fracture end, excessive traction, severe fracture, large soft tissue defect, poor blood circulation in the affected area, infection of bone tissue, internal reaction in the tissue, internal Allergy to fixed materials. As long as any condition reaches a certain time and intensity, it can arouse the non-specific response of the whole body, and produce a series of changes in nerve, endocrine and immune function. Poor performance, low immune function in the affected area, changes in blood rheology, and changes in pH are all related.