What method uses weights to align fractured bones?

Skeletal traction is a method that uses weights to directly align fractured bones, allowing for proper healing and stabilization. This technique involves the application of a force through a pin or wire that is surgically inserted into the bone. The weights are attached to this pin or wire, creating a continuous pulling force that helps keep the bones properly aligned during the healing process. This method is particularly effective in cases of complex fractures where other methods, such as cast immobilization, may not provide adequate alignment or stabilization.

In contrast, the other methods listed function differently. A plaster cast is used to immobilize and support a fractured bone but does not apply a constant weight or force for alignment. Closed reduction involves realigning bones without creating an external fixation; it is typically performed under anesthesia and does not use weights. Skin traction, while it can apply force and help with alignment, relies on adhesive materials or straps applied to the skin rather than surgical pins or weights. Thus, skeletal traction is uniquely effective for managing certain types of fractures through controlled forces applied directly to the bone structure.