Effects of resin formulation and nanofiller surface treatment on in vitro wear of experimental hybrid resin composite.
J Biomed Mater Res B Appl Biomater
; 77(1): 120-5, 2006 Apr.
Article
in En
| MEDLINE
| ID: mdl-16184536
ABSTRACT
While adding nonbonded nanofillers and lowering the viscosity of the resin matrix have shown success in reducing deleterious polymerization stresses in dental composites, their effects on wear resistance is unknown. This study evaluated abrasion and attrition wear of experimental composites with varied resin viscosities [inherent to varied ratios of TEGDMAUDMAbis-GMA (473316 wt%; 303333 wt%; 123351 wt%)] and nanofiller surface treatment (12.6 wt% silanated or unsilanated silica OX-50; 0.04 microm). Specimens (n = 6) were light cured, aged in water at 37 degrees C for 7 days, and evaluated in the new OHSU oral wear simulator (100,000 cycles). Nonbonded nanofiller increased abrasion and attrition in the low and medium viscosity composites. Increase in resin viscosity increased abrasion and attrition in composites containing silanated nanofiller, with equivocal effects in composites containing unsilanated nanofiller. Nonbonded nanofiller can lower the overall wear resistance of some composite formulations. Increasing resin viscosity generally lowers the wear resistance, but had minimal effect on composites containing nonbonded nanofiller.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Biocompatible Materials
/
Composite Resins
/
Dental Restoration Wear
Type of study:
Evaluation_studies
Limits:
Humans
Language:
En
Journal:
J Biomed Mater Res B Appl Biomater
Journal subject:
ENGENHARIA BIOMEDICA
Year:
2006
Type:
Article
Affiliation country:
United States