A simple and quantitative method for the assessment of fracture healing has been developed. this method depends on a technique of vibration analysis evolved from a study of 30 intact human tibiae and has been applied to the study of 22 tibial fractures. Real time vibration analysis will allow quantitative comparisons of different methods of non-operative fracture management, and, in addition to providing a uniquely powerful research tool, may have value in aiding clinical management decisions.