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ARTICLE
Year : 2010  |  Volume : 4  |  Issue : 1  |  Page : 14-19

"Effect of Er: Yag laser irradiation on fluorosed root surface: A S.E.M study"


1 Private Practitioner, Innovate Smile Design Centre, Surat, Gujarat, India
2 Post-graduate Student, Department of Periodontics, College of Dental Sciences, Davangere, Karnataka, India
3 Senior Professor, Department of Periodontics, College of Dental Sciences, Davangere, Karnataka, India
4 Professor Emeritus, Department of Periodontology, School of Dentistry, University of Missouri, Kansas City, MO, USA

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Source of Support: None, Conflict of Interest: None


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Aim: Fluorosis may bring about mineralization changes in the teeth. As Er:YAG laser irradiation is known to affect the mineralized tissues, the therapeutic benefit provided by lasers on fluorosed cementum requires to be studied. Therefore, this invitro study aimed to evaluate and compare the root surface changes following 2.94 μm Er:YAG laser irradiation on fluorosed and non-fluorosed teeth. Materials and Methods: 30 periodontally healthy fluorosed (FH) and non-fluorosed (NFH) root specimens were irradiated using the 2.94 μm Er:YAG laser at 140 mJ/pulse and 10 Hz energy parameters. SEM observation was performed to assess the laser induced ultrastructural changes in root surface. A dichotomous expression of root surface changes in each of the group was performed, for intergroup comparison. Results: A complete absence of thermal changes but presence of morphological changes like etched surface, melting of surface, smear layer, exposure of collagen tufts and open dentinal tubules, was observed in both FH and NFH root specimens. Intergroup comparisons using the dichotomous data indicated that except for melting of root surface, other undesirable morphological changes were found to be more in NFH root specimens than FH root specimens. Conclusion: The present study results suggest that the undesirable morphological changes were observed almost similarly in FH and NFH groups using the Er:YAG laser energy settings of 140 mJ/pulse and 10 Hz. Therefore, further in-vitro studies are required at lower energy settings, followed by clinical trials to elucidate and validate the use of Er:YAG laser on the fluorosed root surface.


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