Initial fibroblast attachment to Erbium:YAG laser-irradiated dentine.
Int Endod J
; 44(12): 1134-44, 2011 Dec.
Article
em En
| MEDLINE
| ID: mdl-21851368
ABSTRACT
AIMS:
To evaluate the effects of Erbium (Er)YAG laser irradiation on the morphology of resected dentine surfaces, and to investigate fibroblast attachment to laser-irradiated dentine surfaces.METHODOLOGY:
Dentine blocks obtained from single-rooted human teeth were divided into the following groups after sterilization in an autoclave (i) Laser group treated with ErYAG laser irradiation (30 mJ per pulse, 10 pps, 60 s); (ii) L-MTAD group treated with laser irradiation as in (i) plus a mixture of doxycycline, tetracycline isomer and citric acid; (iii) RC-Prep group treated with EDTA gel or cream (RC-Prep) and (iv) Control group left untreated. After each treatment, the dentine blocks were incubated with NIH/3T3 fibroblasts cultured to subconfluency in Dulbecco's modified Eagle's medium supplemented with 10% foetal bovine serum and antibiotics. The number of attached cells amongst the groups was analysed statistically at the 5% significance level. The dentine surface morphologies and cell attachments were evaluated by counting assays, histological observations and scanning electron microscopy (SEM).RESULTS:
The number of attached cells was significantly higher (P < 0.05) in the Laser group than in the RC-Prep and Control groups at 16 h. Dendritic cell extension of the fibroblasts was only observed in the Laser group at 8 h by SEM. In the histological analyses, significantly more attached cells were found on the dentine surfaces treated with laser irradiation.CONCLUSIONS:
ErYAG laser irradiation induced morphological alterations in dentine surfaces, which may improve the attachment of fibroblasts to dentine.
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Base de dados:
MEDLINE
Assunto principal:
Terapia com Luz de Baixa Intensidade
/
Dentina
/
Lasers de Estado Sólido
/
Fibroblastos
Idioma:
En
Ano de publicação:
2011
Tipo de documento:
Article