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Dynamic hip screw (DHS) or Sliding Screw Fixation is a type of orthopaedic implant designed for fixation of certain types of hip fractures which allows controlled dynamic sliding of the femoral head component along the construct. [citation needed] It is the most commonly used implant for extracapsular fractures of the hip, [1] which are common ...
The sliding screw plate (dynamic compression screw, dynamic hip screw) may be used to treat intertrochanteric fractures as well as other injuries. This device consists of a lag screw and a side plate with a barrel. The sliding screw telescopes and provides fixation while allowing impaction to occur at the fracture during healing and weight ...
A hip fracture is a break that occurs in the upper part of the femur (thigh bone), at the femoral neck or (rarely) the femoral head. [2] Symptoms may include pain around the hip, particularly with movement, and shortening of the leg. [2] Usually the person cannot walk. [3] A hip fracture is usually a femoral neck fracture.
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A femoral fracture is a bone fracture that involves the femur. They are typically sustained in high-impact trauma, such as car crashes , due to the large amount of force needed to break the bone. Fractures of the diaphysis , or middle of the femur, are managed differently from those at the head, neck, and trochanter ; those are conventionally ...
Once the fragments are reduced, the reduction is maintained by application of casts, traction, or held by plates, screws, or other implants, which may in turn be external or internal. It is very important to verify the accuracy of reduction by clinical tests and X-ray, especially in the case of joint dislocations.
The osteoblasts form new lamellar bone upon the recently exposed surface of the mineralized matrix. This new lamellar bone is in the form of trabecular bone. Eventually, all of the woven bone and cartilage of the original fracture callus is replaced by trabecular bone, restoring most of the bone's original strength. [citation needed]
The recommended screw placement is in the center of the epiphysis and perpendicular to the physis. [13] Chances of a slippage occurring in the other hip are 20 percent within 18 months of diagnosis of the first slippage and consequently the opposite unaffected femur may also require pinning.