1. Diathermy in repeated clinical doses causes a delay in the healing of fractures in rabbits and in the union of bone grafts in dogs. The new-hone new-bond formation and callus are of poor structural quality.
2. Diathermy causes a decrease in the formation of osteoporosis following bone trauma in dogs and rabbits.
3. the continued use of diathermy in clinical closes causes oedema of the skin, subcutaneous tissues, and muscles in rabbits.
4. There is marked stimulation of hair growth in rabbits within four days following the use of diathermy.
5. Theuse of diathermy causes a marked delay in the healing of sutgical wounds in dogs and rabbits.
Section of Orthopaedic Surgery, Veterans Administration Hosptal, McKinney, Texas