Sodium hypochlorite effects on dentin bond strength and acid-base resistant zone formation by adhesive systems
Braz. j. oral sci
;
14(4): 334-340, Oct.-Dec. 2015. ilus, tab
Article
in English
| LILACS, BBO
| ID: lil-797258
ABSTRACT
Aim:
To evaluate the effects of 10% NaOCl gel application on the dentin bond strengths and morphology of resin-dentin interfaces formed by three adhesives.Methods:
Two etch-and-rinseadhesives (One-Step Plus, Bisco Inc. and Clearfil Photo Bond, Kuraray Noritake Dental) and oneself-etch adhesive (Clearfil SE Bond, Kuraray Noritake Dental) were applied on dentin accordingto the manufacturers instructions or after the treatment with 10% NaOCl (ED-Gel, Kuraray NoritakeDental) for 60 s. For interfacial analysis, specimens were subjected to acid-base challenge andobserved by SEM to identify the formation of the acid-base resistant zone (ABRZ). For microtensilebond strength, the same groups were investigated and the restored teeth were thermocycled(5,000 cycles) or not before testing. Bond strength data were subjected to two-way ANOVA andTukeys test (p<0.05).Results:
NaOCl application affected the bond strengths for One-Step Plusand Clearfil Photo Bond. Thermocycling reduced the bond strengths for Clearfil Photo Bond andClearfil SE Bond when used after NaOCl application and One-Step Plus when used asrecommended by manufacturer. ABRZ was observed adjacent to the hybrid layer for self-etchprimer. The etch-and-rinse systems showed external lesions after acid-base challenge and noABRZ formation when applied according to manufacturers instructions.Conclusions:
10% NaOClchanged the morphology of the bonding interfaces and its use with etch-&-rinse adhesives reducedthe dentin bond strength. Formation of ABRZ was material-dependent and the interface morphologieswere different among the tested materials.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Sodium Hypochlorite
/
Microscopy, Electron, Scanning
/
Dental Bonding
/
Dentin-Bonding Agents
/
Dental Caries Susceptibility
/
Dentin
Limits:
Female
/
Humans
/
Male
Language:
English
Journal:
Braz. j. oral sci
Journal subject:
Dentistry
Year:
2015
Type:
Article
Affiliation country:
Brazil
/
Japan
Institution/Affiliation country:
Tokyo Medical and Dental University/JP
/
Universidade Estadual de Campinas/BR
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