Influence of chemical and mechanical polishing on water sorption and solubility of denture base acrylic resins.

Autor: Rahal JS; Department of Prosthodontics, Paranaense University (UNIPAR), Umuarama, PR, Brazil., Mesquita MF, Henriques GE, Nóbilo MA
Jazyk: angličtina
Zdroj: Brazilian dental journal [Braz Dent J] 2004; Vol. 15 (3), pp. 225-30. Date of Electronic Publication: 2005 Mar 18.
DOI: 10.1590/s0103-64402004000300012
Abstrakt: Influence of polishing methods on water sorption and solubility of denture base acrylic resins was studied. Eighty samples were divided into groups: Classico (CL), and QC 20 (QC) - hot water bath cured; Acron MC (AC), and Onda Cryl (ON) - microwave cured; and submitted to mechanical polishing (MP) - pumice slurry, chalk powder, soft brush and felt cone in a bench vise; or chemical polishing (CP) - heated monomer fluid in a chemical polisher. The first desiccation process was followed by storage in distilled water at 37 +/- 1 degrees C for 1 h, 1 day, 1, 2, 3 and 4 weeks. Concluding each period, water sorption was measured. After the fourth week, a second desiccation process was done to calculate solubility. Data were submitted to analysis of variance, followed by Tukey test (p
Databáze: MEDLINE