The application of Moire magnification to high-resolution studies of human premolar eruption.

@article{Trentini1995TheAO,
  title={The application of Moire magnification to high-resolution studies of human premolar eruption.},
  author={C J Trentini and William Henry Harrison Brown and Robert Leroy Paterson and William R. Proffit},
  journal={Archives of oral biology},
  year={1995},
  volume={40 7},
  pages={
          623-9
        }
}
The optical phenomenon of Moire magnification can be used to provide real-time measurements of the position of an erupting human premolar, with a resolution of 0.1 micron or better. A new instrument for this purpose, which allows repeated measurements in the same individual, is described. Cyclic changes in the position of the erupting tooth in concert with the heartbeat, with a magnitude of 0.05-0.35 micron, can be discerned. An unusual cyclic rhythm, with a period of 20-50 s, was observed. 
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