Surface roughness of acrylic resins processed by microwave energy and polished by mechanical and chemical process
Braz. j. oral sci
;
5(16): 977-981, 2006. ilus, tab
Article
in English
| LILACS, BBO
| ID: lil-472526
ABSTRACT
The aim of this study was to evaluate the influence of polymerization methods (microwave energy - MW, and water bath - WB) and polishing techniques (chemical - C and mechanical - M) on the surface roughness of one heat-polymerized acylic resin (Vipi-Cril). Forty acrylic resin disk-shaped samples were made according to ADA specification nº 12. Half of samples were processed by microwave energy (500W for 3 minutes), and the other half by water bath (74±1 ºC for 9 hours). After deflasking, the samples were trimmed with a sequence of abrasive aluminum oxide sandpapers of different grades (180, 220 and 400) and divided in 4 groups according to polymerization methods and polishing techniques G1 MW+CP, G2 MW+MP, G3 WB+CP and G4 WB+MP. Surface roughness values were measured using a Surfcorder SE 1700 rugosimeter (Kosaka Laboratory Ltd, Kosaka, Japan). Mann-Whitney test (p=.05) indicated significant differences between polishing methods processed by microwave energy (p= .0018), and between polishing methods processing by water bath (p= .0002). Samples processed by both methods (water bath or microwave energy) showed smoother surfaces when polished by mechanical polishing method, and polymerization methods did not influence in surface roughness.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Surface Properties
/
Acrylic Resins
/
Dental Polishing
Language:
English
Journal:
Braz. j. oral sci
Journal subject:
Dentistry
Year:
2006
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
State University of Campinas/BR
/
Universidade Estadual de Campinas/BR
Similar
MEDLINE
...
LILACS
LIS