Enamel and dentin irradiation with 9.6 micros COsub(2) and 2.94 microns Er:YAG lasers
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Laser Physics Letters
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: Background and objective: The objective of this study
was to evaluate the bond strength between a composite resin
and dental hard tissues, which have been previously irradiated
with an Er:YAG (2.94 µm) or CO2 (9.6 µm) laser. Materials
and methods: A total of 156 bovine teeth were divided into 6
groups: Group 1 – Enamel control: acid etched enamel (Single Bond); Group 2 – Dentin control: acid etched dentin (Single
Bond); Group 3 – Irradiated enamel (CO2 laser – 3 W) followed
by acid etching; Group 4 – Irradiated dentin (CO2 laser – 3 W)
followed by acid etching; Group 5 – Irradiated enamel (Er:YAG
laser – 0.16 W) followed by acid etching; Group 6 – Irradiated
dentin (Er:YAG laser – 0.16 W) followed by acid etching. Results: Treatment only with acid etching and also the Er:YAG laser
irradiation followed by acid etching showed the highest bond
strength value while the CO2 laser irradiation followed by acid
etching treatment produces the lowest bond strength values in
both tissues. Conclusion: Acid etching of non-irradiated and Erbium YAG laser irradiated tissues produces better adhesion than
acid etching of CO2 laser irradiated surfaces.
Dentin surface after CO2 laser irradiation (150 mJ, 20 Hz,
212.2 J/cm2, 3 W) followed by acid etching, the smooth melting pattern is removed and the dentin tubules are exposed with a
similar aspect as the acid etching only.
Como referenciar
MARRACCINI, T.M.; BACHMANN, L.; WIGDOR, H.A.; WALSH JUNIOR, J.T.; STABHOLTZ, A.; ZEZELL, D.M. Enamel and dentin irradiation with 9.6 micros COsub(2) and 2.94 microns Er:YAG lasers: bond strength evaluation. Laser Physics Letters, v. 3, n. 2, p. 96-101, 2006. DOI: 10.1002/lapl.200510058. Disponível em: http://repositorio.ipen.br/handle/123456789/7711. Acesso em: 24 Mar 2026.
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