The effect of finishing and polishing on surface roughness of a processed resilient denture liner.
A raised ridge on a Molloplast-B sample was removed using one of three burs, four stones, or a coarse sandpaper disc. Samples were polished using pumice alone, tin oxide alone, or both agents. A flat, unfinished sample served as a control. The average surface roughness was measured after reductions and subsequent polishings. The length of time required for initial reduction was recorded. Average surface roughness measurements ranged from 16.0 to 1.4 microns, with the control measuring 0.66 micron. Without polishing, burs produced rougher surfaces than stones and required longer times for reduction. Bur samples also remained rougher than stone samples after pumicing. No significant differences were found between treatments or controls after the use of either a combination of pumice and tin oxide or tin oxide alone.
Loney
R W
RW
Division of Removable Prosthodontics, College of Dentistry, University of Saskatchewan, Saskatoon, Canada.
Moulding
M B
MB
D000180:Acrylic Resins; D000704:Analysis of Variance; D003775:Dental Polishing / Q000295:instrumentation* / Q000379:methods; D003822:Denture Liners; D004129:Dimethylpolysiloxanes; D008855:Microscopy, Electron, Scanning; D017640:Silicates; D012826:Silicone Elastomers; D013499:Surface Properties; D017971:Tin Compounds
D000180:Acrylic Resins; D004129:Dimethylpolysiloxanes; C020964:MDX 4-4210; D017640:Silicates; D012826:Silicone Elastomers; D017971:Tin Compounds; C040291:Lucitone; C045358:stannic oxide; C005144:pumice