EFFECT OF VIBRATION UPON THE DENTAL PULP AND PERIOSTEUM OF WHITE RATS

¹ Naval Medical Research Institute, National Naval Medical Center, Bethesda, Md.

1. Exposure of white rats to vibration of ±0.05 inch amplitude at a frequency of 2600 cycles per minute, 8 hours daily, 6 days per week, for 28 days, did not affect the rate of growth of the incisor teeth, or the calcification of the dentin as shown by the constant average width and number of measurable dark plus light incremental rings in the dentin.

2. Histologic examination of the dentin, pulp, alveolar periosteum, alveolar bone, and the structures of the temporomandibular articulation failed to disclose any greater variation of cellular changes than occur normally.