Effect of pre- heating on hardness of methacrylate- and silorane- based composites
J. res. dent
; 2(5): 370-375, sep.-oct2014.
Article
in En
| LILACS, BBO
| ID: biblio-1363352
Responsible library:
BR97.1
ABSTRACT
AIM:
To evaluate the effect of composite pre-heating on the microhardness of different monomer resin-based. MATERIALS ANDMETHOD:
Circular specimens of methacrylate- and silorane-based composite resins pre-heated at 23, 39, and 55Ë C were carried out, and cured using a halogen light-curing unit at 650 mW/cm². After 24 h, the specimens were polished and Knoop hardness number (KHN) was measured using a microhardness tester with 50-g load for 15 s. The data were analyzed with ANOVA and Tukey's tests (α = 0.05).RESULTS:
Top surface presented higher KHN than bottom, methacrylate-based composite showed higher KHN compared to silorane, and pre-heating increased the KHN of the composites tested.CONCLUSION:
Pre-heating can be used to improve the microhardness of methracrylate- and silorane-based composites.Key words
Full text:
1
Collection:
01-internacional
Database:
BBO
/
LILACS
Main subject:
Composite Resins
/
Polymerization
Limits:
Humans
Language:
En
Journal:
J. res. dent
Journal subject:
ODONTOLOGIA
/
Sa£de Bucal
Year:
2014
Document type:
Article
Affiliation country:
Belgium
/
Brazil