Which type of traction is commonly used in the treatment of femur fractures?

Skeletal traction is the correct choice for the treatment of femur fractures. This method involves the use of pins, screws, or wires that are surgically inserted into the bone, which then attaches to weights to apply a direct force. This technique is effective for aligning the fractured bone segments and maintaining proper position throughout the healing process.

Skeletal traction is particularly beneficial for femur fractures because it allows for longer-term, consistent traction, which is necessary for the larger and stronger forces involved in femur-related injuries. It also enables more effective immobilization than other methods, facilitating recovery and reducing the likelihood of complications such as malunion or nonunion.

The other options listed are not typically used for managing femur fractures. Russell's traction, for example, is usually employed for knee injuries and is less effective for proximal or mid-femur fractures. A Pavlik harness is utilized primarily for developmental dysplasia of the hip in infants rather than for femur fractures. Hare traction is a type of emergency traction that may be used in pre-hospital settings but is not intended for definitive treatment of femur fractures, making it less suitable in comparison to skeletal traction.