Artigo
Effects of copper vapor laser irradiation (λ = 510.6 nm) on the enamel and dentine of human teeth: An ultra-structural morphologic study
Registro en:
Photomedicine and Laser Surgery, v. 22, n. 6, p. 494-498, 2004.
1549-5418
10.1089/pho.2004.22.494
WOS:000226127600007
2-s2.0-13844311242
WOS000226127600007.pdf
3422118958429909
Autor
Niccoli-Filho, Walter [UNESP]
Plácido Penna, Luiz Alberto [UNESP]
Mello Rode, Sigmar [UNESP]
Riva, Rudimar
Resumen
Objective: A morphological and ultra-structural study of copper vapor laser (λ = 510.6 nm) effects on enamel and dentine was performed to show the effects of this radiation. Methods: A total of 15 human molars were cut in half; 15 pieces were separated for irradiation on enamel and 15 for dentine. These two groups were further divided into five experimental groups, including a control group, comprised of three half-sections each, irradiated by a CVL laser with a power of 7 W, a repetition rate of 15,000 pulses/sec and exposed at 500, 600, and 800 msec and 1 sec irradiation times with a 5-sec interval between irradiations. Results: In an ultra-structural SEM exam, we observed that on the enamel surfaces irradiated for 1 sec there was morphological alteration that consisted of catering, flaking, and melting on the surfaces. There was no alteration for the other exposure times. On the dentine teeth irradiated for 1 sec, we observed an evident ultra-structural alteration of melted tissue and loss of morphological characteristics. In the dentine group irradiated by 800 msec, we observed ablation and a partial loss of morphological characteristics. In the dentine groups irradiated by 500 and 600 msec, no alteration was observed. Conclusions: The results showed that irradiation with CVL promoted morphologic changes in the enamel as well as in the dentine and demonstrated a need for future studies in order to establish a safe protocol for further use in the odontological practice. Acad. Grp. Studs./Res. Lasers Dent. S. Paulo State Univ. Sch. of Dent., Sao Jose dos Campos, Sao Paulo Maxillofacial Prosthesis S. Paulo State Univ. Sch. of Dent., Sao Jose dos Campos, Sao Paulo Odontological Mat. and Prosthesis S. Paulo State Univ. Sch. of Dent., Sao Jose dos Campos, Sao Paulo Department of Physics Advanced Studies Institute Lasers Division, Sao Jose dos Campos, Sao Paulo Acad. Grp. Studs./Res. Laser Dent. Sao Paulo State University, Av. Francisco Jose Longo, 777, 12245-000 Sao Jose dos Campos, SP Acad. Grp. Studs./Res. Lasers Dent. S. Paulo State Univ. Sch. of Dent., Sao Jose dos Campos, Sao Paulo Maxillofacial Prosthesis S. Paulo State Univ. Sch. of Dent., Sao Jose dos Campos, Sao Paulo Odontological Mat. and Prosthesis S. Paulo State Univ. Sch. of Dent., Sao Jose dos Campos, Sao Paulo Acad. Grp. Studs./Res. Laser Dent. Sao Paulo State University, Av. Francisco Jose Longo, 777, 12245-000 Sao Jose dos Campos, SP
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Effects of copper vapor laser irradiation (λ = 510.6 nm) on the enamel and dentine of human teeth: An ultra-structural morphologic study
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Effects of copper vapor laser irradiation (λ = 510.6 nm) on the enamel and dentine of human teeth: An ultra-structural morphologic study
Universidade Estadual Paulista (Unesp); Lasers Division (Mary Ann Liebert, Inc., 2004-12-01)Objective: A morphological and ultra-structural study of copper vapor laser (λ = 510.6 nm) effects on enamel and dentine was performed to show the effects of this radiation. Methods: A total of 15 human molars were cut in ... -
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