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Effects of Er:YAG Laser Irradiation on Removal of Subgingival Calculus.  

Cho, In-Gu (Dept. of Periodontology, College of Dentistry. Dental Science Research Institute, Chonnam National University)
Kim, Young-Jun (Dept. of Periodontology, College of Dentistry. Dental Science Research Institute, Chonnam National University)
Chung, Hyun-Ju (Dept. of Periodontology, College of Dentistry. Dental Science Research Institute, Chonnam National University)
Publication Information
Journal of Periodontal and Implant Science / v.32, no.2, 2002 , pp. 315-324 More about this Journal
Abstract
The purpose of this in vitro study was to evaluate the efficiency of Er:YAG laser on calculus removal and the morphologic changes and hardness of the irradiated surface at different power settings. This experiment used human teeth which were extracted due to periodontal disease and had a band of calculus. Forty root slabs ($5{\times}5mm$) were made and divided into control group and irradiated groups. Experimental groups were as follows; Control group (root planing), Group1 (irradiated with laser at 30mJ), Group2 (irradiated with laser at 60mJ), Group3 (irradiated with laser at 100mJ). Twelve root slab embedded in resin block were used in each group. Er:YAG laser was applied under water irrigation with the tip held perpendicular to the root surface in contact mode. The treatment time was measured until the calculus was removed completely under naked eyes. The efficiency of calculus removal was evaluated by the time for removal. Morphological changes of laser irradiated site were observed under SEM and the surface hardness was measured using a VH tester. The results were as follows; 1. The efficiency of laser scaling was increased with increasing the energy level of irradiation(p<0.05). 2. The morphological changes such as carbonization, crater and scale-like defects in the irradiated root surface were frequently observed with increasing the energy level. 3. The surface hardness tended to increase at 60mJ and 100mJ irradiated groups than that of control group. From the results evaluting on the efficiency, morphological change and surface hardness, lower energy level was suggested for the clinical application of the Er:YAG laser in scaling.
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1 Jones WA, O'Leary TJ. The effectiveness of in vivo root planing in removing bacterial endotoxin from the roots of periodontally involved tooth. J Periodontol 1978;49:337-342   DOI   PUBMED
2 Loe H. Experimental gingivitis in man. J Periodontol 1965;36:177-187   DOI   PUBMED   ScienceOn
3 Stern RH, Sognnaes RF. Laser beam effect on dental hard tissues. J Dent Res 1964;43 (spec. Issue):873 (Abstr. 307)
4 Morioka T, Morita E, Suzuki K. Effect on dental deposits and intrinsic stains of irradiation with a Nd:YAG laser (in Japanese). Jpn J Dent Hlth 1982;31:39-43
5 Morlock BJ, Pippin DJ, Cobb CM, Killoy WJ, Rapley JW. The effect of Nd:YAG lasers exposure on root surfaces when used as an adjunct to root planing : an in vitro study. J Periodontol 1992;63:637-641   DOI
6 Schageter L, Rateitschak-Pluss EM, Schwarz JP. Root surface smoothness or roughness following open debridement an in vivo study. J Clin Periodontol 1996;23:460-464   DOI   ScienceOn
7 Corbet EF, Vaughan AJ, Kieser JB. The periodontally involved root surface. J Clin Periodontol 1993;20:402-410   DOI   ScienceOn
8 Miserendino LJ, Robert MP. Lasers in Dentistry. Quintessence publishing Co, Inc 1995:57-58
9 Keller U, Hibst R. Experimental studies of the application of the Er:YAG laser on dental hard substances. Light microscopic and SEM investigations. Lasers Surg Med 1989;9:345-351   DOI   ScienceOn
10 Ishikawa K, Fukuda M, Minoura S. Preliminary study for the removal of subgingival calculus using Nd:YAG laser. J Jpn Assoc Periodont 1993;36:902-909
11 Maiman TH. Stimulated Optical radiation in ruby. Nature 1960;187:493-494   DOI
12 Tseng p, Liew V. The potential application of a Nd:YAG laser in periodontal treatment. J Periodontol 1990;11:20-22
13 Frentzen M, Koort HJ. Lasers in dentistry :New possibilities with advancing laser technology. Int Dent J 1990;40:323-332
14 Frentzen M, Koort H, Thiensiri. Excimer lasers in dentistry: Future possibilities with advanced technology. Quintessence Int 1992;23:117-133.
15 Radvar M, Creanor SL, Gilmour WH, Payne AP. An evaluation of the effects of an Nd:YAG laser on subgingival calculus, dentine and cementum :An in vitro study. J Clin Periodontol 1995;22:71-77   DOI   ScienceOn
16 Goldman L, Hornby P, Meyer R, Goldman B. Impact of the laser on dental caries. Nature 1964;203:417
17 Adrian JC. Pulpal effects of Nd:YAG laser . Oral Surg 1977;44:301-305   DOI   ScienceOn
18 Ito K, Fukuda M, Minoura S. Effects of Nd:YAG laser radiation on removal of a root surface smear layer after root planing: A scanning electron microscopic study. J Periodontol 1993;64:547-552.   DOI
19 Rabbani GM, Ash MM, Caffesse RG. The effectiveness of subgingival scaling and root planing in calculus removal. J Periodontol 1981;52:119-123   DOI
20 Paghidiwala AF. Er:YAG laser hard tissue effects. In Moretti M. Lasers in Dentistry. Penn Well Publishing Co. 1991:63-75
21 Paghidiwala AF. Root resection of endodontically treated teeth by Er:YAG laser radiation. In Proceedings of Lasers in Orthopedic, Dental and Veterinary Medicine. SPIE 1991;1424:150-159
22 Koort HJ, Frentzen M. Pulsed lasers in dentistry---sense or nonsense? In Proceedings of Lasers in Orthopedic, Dental and Veterinary Medicine. SPIE 1991;1424:87-98   DOI
23 Aoki A, Ando Y, Watanabe H, Ishikawa. I. In vitro studies on laser scaling of subgingival calculus with an Er:YAG laser. J Periodontol 1994;65:1097-1106   DOI
24 Theilade E, Wright WH, Jensen SB, Loe H. Experimental gingivitis in man. A longitudinal clinical and bacteriological investigation. J Periodont Res 1966;1:1-13.   DOI
25 Morlock BJ, Pippin DJ, Cobb CM, Killoy WJ, Rapley JW. The effect of Nd:YAG laser exposure on root surfaces when used as an adjunct to root planing: in vitro study. J Periodontol 1992;63:637-641   DOI