Effect of a desensitizing dentifrice on the bond strength of different adhesive systems
Braz. j. oral sci
;
12(2): 148-152, Apr.-June 2013. tab
Article
in English
| LILACS, BBO
| ID: lil-694435
ABSTRACT
Aim:
This in vitro study evaluated the effect of using a dental hypersensitivity treatment on thebond strength to dentin of etch-and-rinse and self-etching simplified adhesive systems.Methods:
40 healthy molars were used. The crowns of teeth were removed at the dentinoenamel junction,and remaining roots were sectioned in the mesiodistal direction along their long axis, separatingthe buccal and lingual/palatal halves. The segments obtained were ground, keeping the buccalor lingual/palatal face turned downwards in order to flatten the surface and produce a standardizedsmear layer. Prepared specimens were randomly distributed into 4 groups (n=10), according tothe combination of surface treatment with the desensitizing dentifrice Colgate Sensitive Pro-Relief(Colgate Palmolive®) (test group - with dentifrice and control group - without dentifrice) and typeof simplified bonding agent (etch-and-rinse and self-etching agents). Resin composite blockswere fabricated on the dentin surfaces, after application of bonding agents, and specimens weresectioned into rectangular stick-shaped specimens with cross-sectional area of approximately0.8mm2. For microtensile bond strength tests, 4 sticks were randomly selected from the centralregion of specimens, and fixed to a universal test machine. Data were analyzed statistically by theMann-Whitney U test (a=0.05).Results:
The bond strength obtained in the group withoutdesensitizer (control) + etch-and-rinse agent was significantly higher compared with the othergroups. Under both experimental conditions, the self-etching agent showed weak bond strengthto dentin.Conclusions:
Change in the dentin substrate by obliteration of tubules in the processof relieving dentinal sensitivity could reduce the bond strength of simplified etch-and-rinse andself-etching bonding agents.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Dentin
/
Dentin Sensitivity
Language:
English
Journal:
Braz. j. oral sci
Journal subject:
Dentistry
Year:
2013
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Federal University of Bahia/BR
/
School of Medicine and Public Health of Bahia/BR
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