Premium
Surface roughness of acrylic resins submitted to mechanical and chemical polishing
Author(s) -
Rahal J. S.,
Mesquita M. F.,
Henriques G. E. P.,
Nóbilo M. A. A.
Publication year - 2004
Publication title -
journal of oral rehabilitation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 93
eISSN - 1365-2842
pISSN - 0305-182X
DOI - 10.1111/j.1365-2842.2004.01344.x
Subject(s) - polishing , acrylic resin , surface roughness , materials science , composite material , surface finish , nuclear chemistry , chemistry , coating
summary Surface roughness is extremely important as it influences micro‐organism accumulation and consequently oral health. The aim of the present study was to evaluate the influence of mechanical polishing (MP) and chemical polishing (CP) on surface roughness of four heat‐cured denture base acrylic resins. Twenty sample discs were prepared for each of the following acrylic resins: Clássico (CL), QC 20 (QC), Acron MC (AC) and Onda Cryl (ON). The first two are boiling cured resins and the latter two are microwave cured. After curing and deflasking, samples were ground and subdivided into two groups: MP, which received pumice slurry, chalk powder, soft brush and felt cone, at a bench vice; and CP, which received fluid specifically for chemical polisher. Surface roughness was measured using a Surf Corder SE 1700 rugosimeter. Data collected were statistically analysed by analysis of variance followed by Tukey's test. Surface roughness means in μ m were: CL‐MP: 0·0350; CL‐CP: 0·2298; QC‐MP: 0·0307; QC‐CP: 0·1792; AC‐MP: 0·0312; AC‐CP: 0·2700; ON‐MP: 0·0321; ON‐CP: 0·2949. It can be concluded that MP produced significantly smoother surfaces than CP and that surface roughness because of MP was not influenced by acrylic resin type, whereas this was not true of CP.