Abstract:
:This study examined the effect of air abrasion and thermocycling on the adaptation and shear bond strength, of composite resin bonded to dentin using etch-and-rinse and self-etch resin adhesives. Confocal microscopy showed both adhesives closely adapted to dentin and a significantly (p<0.001) greater number of resin tags were observed for the etch-and-rinse adhesive. Air abrasion significantly increased resin tag length (p<0.05) for the etch-and-rinse adhesive and significantly increased the number (p<0.001), length (p<0.001) and thickness (p<0.01) of tags for the self-etch adhesive. However, air abrasion resulted in defect formation within the hybrid layer and thermocycling caused separation of the hybrid layer from adjacent dentin containing resin tags. A significant (p<0.05) reduction in shear bond strength was observed for the etch-and-rinse adhesive following thermocycling. Both adhesive systems adapted well to dentin in vitro and shear bond strengths were similar. The area of tag penetration into dentin was significantly (p<0.0001) enhanced following air abrasion.
journal_name
Dent Mater Jjournal_title
Dental materials journalauthors
Freeman R,Varanasi S,Meyers IA,Symons ALdoi
10.4012/dmj.2011-146subject
Has Abstractpub_date
2012-01-01 00:00:00pages
180-8issue
2eissn
0287-4547issn
1881-1361pii
JST.JSTAGE/dmj/2011-146journal_volume
31pub_type
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