Abstract
This study addresses investigations of dental tissue surfaces by in vitro shift interferometry. This work is relevant because use of this device for measuring the surface of dental enamel has high precision — to tenths of micrometers. The operation of a functional interferometer system is described. The criteria for adjustment of the device are given. Experimental results from determination of the surface roughness of a second molar treated with Tokuyama Bond Force II and in the natural state are presented. Measurement error of 0.1 μm was obtained for the treated sample, compared with 0.25 μm for the untreated sample. The measurement error due to the need to rotate the radiation polarization plane using a half-wave plate in one channel of the shift interferometer was estimated.
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