spiral fracture
pulley
A screw is an inclined plane wrapped around a shaft. The inclined plane is a simple machine that offers the user a mechanical advantage. The shaft is what transmits a torque to that advantage.
The part of a screw that is wrapped around the central shaft of the screw is normally called a thread. It can be described technically as an inclined plane.
Most wells do not use pulleys. The traditional style simply winds the rope around the shaft. The mechanical advantage is made by the length of the crank handle, in relation to the diameter of the accumulated rope on the shaft.
It is a screw that has 4 threads wrapping around the shaft ( and 4 starting points) where a standard screw has just one thread that wraps around its shaft. It requires a matching nut. It travels 4 times as far with the same radius of turn so it is 4 times faster to install.
Closed spiral fracture
This type of line usually indicates a spiral fracture, brought about by an excessive amount of torque applied along the axis of the bone.
This would be a hairline fracture or stress fracture. These only occur in weight bearing bones.
greenstick fracture
Closed fracture of shaft of clavicle
A "boxers" fracture generally refers to a fracture of the metacarpal bones-more commonly the fith metacarpal anywhere between mid shaft and the distal(knuckle) end of the the bone.
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Fractures are termed complete if the break is completely through the bone and described as incomplete or "greenstick" if the fracture occurs partly across a bone shaft
The straight part in the middle, away from both ends of the bone
CPT Code 24505 : Closed treatment of humeral shaft fracture; with manipulation, with or without skeletal traction
Any kind of fracture that is possible to be imagined, from a greenstick incomplete nondislocated fracture to a comminuted open severely displaced fracture. The more common fractures are mid-diaphyseal (mid-shaft) fracture of the femur and the tibia, both open and closed, often displaced due to muscular contraction in reponse to trauma.
The periosteum is the membrane around the shaft of a long bone.