Effects of the Nd:YAG laser on amalgam dental restorative material: a preliminary study

Igor Cernavin; Sean P. Hogan

doi:10.1117/12.251936

23 September 1996 Effects of the Nd:YAG laser on amalgam dental restorative material: a preliminary study

Igor Cernavin, Sean P. Hogan

Proceedings Volume 2887, Lasers in Medicine and Dentistry: Diagnostics and Treatment; (1996) https://doi.org/10.1117/12.251936
Event: Photonics China '96, 1996, Beijing, China

Abstract

The Nd:YAG laser has been marketed as an instrument for use on both hard and soft dental tissues. Its potential for use on hard tissues is limited but it may be the instrument of choice for use in certain soft tissue procedures. The aim of this study was to examine the effects of the Nd:YAG laser on amalgam restorations which frequently occur on tooth surfaces adjacent to areas of soft tissue which may be subjected to the laser. The amalgam used was Tytin. The laser firing was controlled by a computer and a constant repetition rate of 40 Hz was used. Energy per pulse was altered as follows, 30 mJ, 40 mJ, 60 mJ, 80 mJ, 120 mJ and 140 mJ. Exposure times of 0.05 sec, 0.125 sec, 0.25 sec, 0.5 sec, 1 sec, 2 sec, 3 sec, 4 sec, and 5 sec were used. The width of defect was measured using a Nikon measurescope with 10x magnification and it was established that the damage threshold lies between 0.125 sec and 0.25 sec for 30 mJ per pulse. The data was analyzed using a one way ANOVA statistical test. There was a significant correlation between the width of the defect and energy per pulse setting as well as exposure time. The findings indicate that amalgam restorations are prone to damage from inadvertent laser exposure and clinicians must take measures to protect such restorations during lasing of soft tissues.

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Igor Cernavin and Sean P. Hogan "Effects of the Nd:YAG laser on amalgam dental restorative material: a preliminary study", Proc. SPIE 2887, Lasers in Medicine and Dentistry: Diagnostics and Treatment, (23 September 1996); https://doi.org/10.1117/12.251936

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KEYWORDS

Tissues

Nd:YAG lasers

Teeth

Mercury

Laser therapeutics

Natural surfaces

Fiber lasers

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