Effects of low-intensity red laser radiation on the dentine-pulp interface after class I cavity preparation disfunction
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Brazilian Dental Journal
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The aim of this study was to investigate the effects of low-intensity
red laser radiation on the ultrastructure of dentine-pulp interface
after conventionally prepared class I cavity preparation.
Eight premolars indicated for extraction for orthodontic reasons
from 2 patients were used. Class I cavities were prepared and the
teeth were divided into two groups. The first group received a
treatment with a GaAlAs laser, l= 660 nm, P= 30 mW and D=
2J/cm2. The laser tip was applied directly and perpendicularly
into the cavity in only one sense. The teeth from the second group
had their class I cavities prepared but they did not receive the
laser therapy. All cavities were filled with composite resin.
Twenty-eight days after the preparation, the teeth were extracted
and processed for transmission electron microscopy analysis.
Two sound teeth (healthy group) without any preparation were
also examined. The first group presented odontoblastic processes in intimate contact with the extracellular matrix, while the collagen
fibers appeared more aggregated and organized than those of
the second group. These results were also observed in the healthy
teeth. The results suggest that laser irradiation accelerates the
recovery of the structures at the dentine-pulp interface involved
during cavity preparation layer.
Como referenciar
GODOY, B.M.; ARANA-CHAVEZ, V.E.; BORTOLI GROTH, E.B.; RIBEIRO, M.S. Effects of low-intensity red laser radiation on the dentine-pulp interface after class I cavity preparation disfunction. Brazilian Dental Journal, v. 15, p. 86-87, 2004. Special issue. Disponível em: http://repositorio.ipen.br/handle/123456789/32758. Acesso em: 20 Mar 2026.
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