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Effect of ND:YAG Laser Irradiation and Root Planing on the Root Surface: Structural and Thermal Effects
Author(s) -
WilderSmith Petra,
Arrastia AnneMarie A.,
Schell Michael J.,
Liaw LihHueh,
Grill Gary,
Berns Michael W.
Publication year - 1995
Publication title -
journal of periodontology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.036
H-Index - 156
eISSN - 1943-3670
pISSN - 0022-3492
DOI - 10.1902/jop.1995.66.12.1032
Subject(s) - irradiation , laser , root (linguistics) , materials science , dentistry , nd:yag laser , medicine , optics , physics , philosophy , linguistics , nuclear physics
E ffects of N d :YAG laser irradiation on untreated and root planed tooth roots were investigated to determine whether a cleaning effect and/or removal of smear layer could be achieved without concomitant microstructural or thermal damage. Sixty (60) healthy extracted teeth were either untreated, irradiated only, root planed only, or irradiated and root planed. Intra‐pulpal and surface temperatures were monitored during irradiation, then SEM was performed. Smear layer elimination was achieved without inducing hard tissue microstructural damage at 5W, using pulse durations and intervals of 0.1 s, a fluence of 0.77 J/cm 2 , and a total energy density of approximately 700 J/cm 2 . However, these results were not consistent in all samples. At these parameters, intra‐pulpal temperature increases of 9 to 22°C and surface temperature increases of 18 to 36°C were recorded. Thus, despite their effectiveness for smear layer removal, these parameters may not be appropriate for clinical use as an adjunct to conventional periodontal therapy. J Periodontol 1995;66:1032–1039 .