[Experimental study of fracture healing promotion with mechanical vibration in rabbits]

Under aseptic operation, a 0.3mm defect each was resected in the middle shaft of both radii in 54 rabbits. One of 4 groups was subjected to vibration along the long axis of right radius in each healing stage. The feature of fracture healing was evaluated with X-ray film, pathological examinations and measurement of maximum resistance to bending force and pressing stress. The authors came to these preliminary results: (1) The vibration (12.5 approximately 200 Hz) promoted fracture healing; (2) A significant acceleration of fracture healing was seen at the vibrated radius in 3 approximately 4 weeks.