In which type of traction is pull applied to a wire or pin inserted in the bone?

Skeletal traction involves the application of pull or force directly to a bone through a device, such as a wire or pin that has been surgically inserted into the bone. This method allows for a significant and sustained amount of weight to be applied, which is beneficial in managing fractures or certain orthopedic conditions. The use of pins or wires minimizes the risk of skin irritation and allows for more efficient realignment of the bones compared to other forms of traction.

In contrast, manual traction involves the therapist applying force by hand, which is typically less precise and not sustained over long periods. Skin traction utilizes straps or adhesive materials applied to the skin's surface to create a pulling force; this is limited by the skin's ability to tolerate the pull and is generally used for lighter forces. Overhead traction is also typically designed for lighter forces where weights are hung, creating tension without the same direct effect on bone as skeletal traction. Thus, skeletal traction is the preferred method when a strong and direct application of force to the bone is required for healing or stabilization.