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The application of Moire magnification to high-resolution studies of human premolar eruption
C J Trentini1, W H Brown, R L Paterson
1Department of Orthodontics, School of Dentistry, University of North Carolina, Chapel Hill 27599-7450, USA.
Archives of Oral Biology
|July 1, 1995
Abstract:
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.