Article

Comparative study of the dentin/adhesive systems interface after treatment with Er:YAG laser and acid etching using scanning electron microscope.

Department of Restorative Dentistry, Ribeirão Preto School of Dentistry, University of São Paulo (USP), Av. do Café, s/n, Monte Alegre, 14040-904, Ribeirão Preto, São Paulo, Brazil.
Lasers in Surgery and Medicine (impact factor: 2.75). 02/2004; 34(5):385-90. DOI:10.1002/lsm.20064 pp.385-90
Source: PubMed

ABSTRACT To assess dentin/adhesive systems interface after dentin conditioning with Er:YAG laser.
Twenty-four dentin half-disks were assigned to 3 groups: All Bond 2 (AB); Optibond Solo Plus (OP); and Clearfil Liner Bond 2V (CL), which were divided into three sub-groups, according to dentin surface treatment: Er:YAG laser; Er:YAG laser plus acid; acid solely. After the adhesive protocol, specimens were embedded in resin, sectioned, and prepared for SEM analysis. Each area was examined under 1,500x magnification to assess the hybrid layer.
Acid conditioning provided to AB and OP thick and homogeneous hybrid layer, as well as conical and uniform tags. The same pattern was observed for CL. In general, dentin treatment with laser, even when associated to acid, promoted irregular and thin hybrid layer, as well as scarce and thin tags.
Er:YAG laser influenced the adhesive systems interface, hampering hybrid layer formation.

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Keywords

AB
 
Acid conditioning
 
adhesive protocol
 
adhesive systems interface
 
Bond 2
 
Clearfil Liner Bond 2V
 
conical
 
dentin conditioning
 
dentin half-disks
 
dentin surface treatment
 
dentin treatment
 
dentin/adhesive systems interface
 
hampering hybrid layer formation
 
homogeneous hybrid layer
 
irregular
 
sectioned
 
SEM analysis
 
thin hybrid layer
 
thin tags
 
uniform tags