Can a six femur bone sorial fracture happen without abuse in a 6 month old infant?

High Impact Twisting: Spiral fractures of long bones like femur are not common in infants, require large, torsion force, and should always raise suspicion of abuse. Detailed history and skeletal bone survey for any other fractures is warranted. Spiral fractures can occur in accidental, unintentional trauma.

Anything is possible: Femur fractures in infants are unusual. However, it is certainly possible for this to happen without abuse. Fractures in infants are treated with a higher index of suspicion, because six month olds can't do the activities normally associated with long bone fractures, and there are laws requiring physicians to report suspected abuse in infants and the ederly who are not able to care for themselves.

Unlikely: Spiral fractures in an infant are abuse until proven otherwise. They require a twisting force that the baby cannot do to themselves in any fashion.