Morphological and Chemical Alterations of Root Surface after Er:YAG laser, Nd:YAG Laser Irradiation: A Scanning Electron Microscopic and Infrared Spectroscopy Study

Journal of International Society of Preventive & Community Dentistry
R KarthikeyanG Sivaram

Abstract

This study aimed to evaluate the efficacy of Nd:YAG and Er:YAG lasers in removing the smear layer and to study the morphological and chemical alterations of the root surface using scanning electron microscopy (SEM) and infrared (IR) spectroscopy. Fifty-five extracted upper incisor teeth were collected and 110 specimens of size 3 mm × 4 mm × 1 mm were prepared. For SEM evaluation, these samples were divided into six groups: A, B, and C. Group A comprised five samples that served as control. Groups B and C were further divided into five subgroups and each subgroup comprised five samples. All the specimens within the subgroups of B and C irradiated with 100, 200, 300, 400, and 500 mJ of Er:YAG laser and 211.66, 423.33, 635, 846.66, and 1058.33 J/cm2 of Nd:YAG laser, respectively. The morphological changes of the laser-treated sites were observed qualitatively using an arbitrary scale under SEM. The data obtained were statistically analyzed by one-way analysis of variance (ANOVA) multiple range test by Turkey's honestly significant difference and Mann-Whitney U test. In chemical structural changes, Group D comprised five samples that served as nonirradiated control and Groups E and F were irradiated with the same aforementioned par...Continue Reading

References

Mar 1, 1987·Journal of Clinical Periodontology·J A MooreC A Waterman
Mar 6, 2012·Archives of Oral Biology·Alessandra Marques Corrêa-AfonsoMaria Cristina Borsatto
Jul 3, 2013·Lasers in Medical Science·Priscila Yumi SeinoMaria Stella Nunes Araújo Moreira
Jan 12, 2016·Archives of Oral Biology·Sandra ChigaSilmara Aparecida Milori Corona

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Methods Mentioned

BETA
scanning electron microscopy
infrared spectroscopy

Software Mentioned

Statistical Package for the Social Sciences
OMNIC

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