Abstract:
:An acid-base resistant zone (ABRZ) has been shown to be created under a hybrid layer in a self-etching adhesive system at the adhesive/dentin interface. The purpose of this study was to assess the nanostructure of the ABRZ by applying all-in-one adhesive systems. Human premolar dentin was treated with one of two all-in-one adhesive systems; Clearfil Tri-S Bond and G-Bond according to the manufacturers' instructions. After placement of a resin composite, the bonded interface was vertically sectioned and subjected to an acid-base challenge. Following this, the nanostructure of the ABRZ was examined by SEM and TEM. The SEM observations of the adhesive-dentin interface after the acid-base challenge indicated that a hybrid layer less than 1 mum thick was created, and a ABRZ was formed beneath the hybrid layer for each adhesive system. The TEM observations indicated that the ABRZ contained mineral components in both adhesive systems, however, the thickness of the ABRZ was material dependent. The application of the all-in-one adhesive systems created an ABRZ at the underlying dentin, which reinforced normal dentin against dental caries. Therefore, this zone was named 'Super Dentin'. Formation of 'Super Dentin' is a new approach in caries prevention.
journal_name
Biomed Mater Engjournal_title
Bio-medical materials and engineeringauthors
Nikaido T,Weerasinghe DD,Waidyasekera K,Inoue G,Foxton RM,Tagami Jdoi
10.3233/BME-2009-0576subject
Has Abstractpub_date
2009-01-01 00:00:00pages
163-71issue
2-3eissn
0959-2989issn
1878-3619pii
U12678M66G903283journal_volume
19pub_type
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