Dental Materials Journal
Online ISSN : 1881-1361
Print ISSN : 0287-4547
ISSN-L : 0287-4547
Original Paper
Measuring tooth vibrations induced during cavity preparation with time-averaged holography and its influence on near vision acuity in dentists
Iris URLIĆNazif DEMOLIJosip PAVANIvana ŠUTEJRebecca BAŠIĆDubravka NEGOVETIC VRANIC
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2021 Volume 40 Issue 1 Pages 123-128

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Abstract

The aim of this study was to quantify vibrations and their influence on visual acuity. The study consisted of two parts, laboratory and clinical. Time-averaged holographic interferometry (TAHI) method was used in laboratory for measuring the amplitude of tooth vibrations induced by dental handpiece. The amplitudes of tooth vibrations were measured for the three diameters and three speeds. The larger diameter coupled with increasing speed resulted in greater vibration amplitudes, whereby a maximum amplitude of less than one micrometer was detected. For quantifying the natural visual acuity for the corresponding tooth vibrations, we have used the clinical condition approach with miniaturized Snellen optotype as an assessing tool. Central visual acuity did not display variance in visual acuity at rest or under load. Results indicate that the vibrations induced during cavity preparation are not sufficient to negatively affect visual acuity of dentists.

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© 2021 The Japanese Society for Dental Materials and Devices
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