Long-term influence of associating an antibacterial agent with GIC on bond strength to caries-affected dentin
Braz. j. oral sci
;
16: e17035, jan.-dez. 2017. ilus
Article
in English
| LILACS, BBO
| ID: biblio-884040
ABSTRACT
Aim:
To evaluate the bond strength of a GIC associated with chlorhexidine (CHX) to sound and caries-affected dentin, immediately and after six months of storage.Methods:
Sixty molars were assigned to two groups of 30 teeth. One had flat dentin surfaces produced and submitted to caries induction to obtain a caries-affected dentin. In the other group dentin was maintained sound. Teeth of each group were randomly reassigned to three subgroups (n=10) according to the concentration of CHX added to the GIC (0%, 1% and 2% by weight). Two specimens (1mm diameter x 1 mm high) of the same material were constructed on each dentin surface. One was submitted to the microshear bond strength (µSBS) test after 24 hours and the other after 6 months of storage in water at 37oC. Failure modes were analyzed under a stereomicroscope. Bond strength data were analyzed by three-way ANOVA followed by Games-Howell tests for multiple comparisons, and failure modes by the Chi-square test (α = 0.05).Results:
The µSBS values obtained to sound dentin were higher compared with those to caries-affected dentin (p≤0.001). In sound dentin, the group with 2% CHX showed lower µSBS values compared with 0% and 1% CHX after 24 hours (p=0.005 and p=0.032 respectively). In caries-affected dentin, after 24 hours, µSBS in group with 1% CHX was statistically higher than the values in groups with 2% CHX after 24 hours (p=0.001) and 1% CHX after 6 months (p=0.024). Irrespective of the condition of substrate, comparisons showed no statistically significant differences between the other groups (p≥0.053). Cohesive in material and mixed failures prevailed for all groups.Conclusions:
The addition of CHX at concentrations of up to 2% to the GIC did not affect the bond strength of the material to sound and caries-affected dentin in a long-term evaluation (AU)
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Chlorhexidine
/
Dental Caries
/
Dentin
/
Glass Ionomer Cements
/
Anti-Bacterial Agents
Type of study:
Risk factors
Limits:
Humans
Language:
English
Journal:
Braz. j. oral sci
Journal subject:
Dentistry
Year:
2017
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
São Paulo State University/BR
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