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Effects of finishing/polishing time on surface characteristics of tooth‐coloured restoratives
Author(s) -
Adrian Ujin Yap,
Ciprian Său,
Kok Weng Lye
Publication year - 1998
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 - 10.1046/j.1365-2842.1998.00253.x
Subject(s) - polishing , materials science , surface roughness , surface finishing , composite material , distilled water , hardness , composite number , glass ionomer cement , surface finish , indentation hardness , microstructure , chemistry , chromatography
This study compared the effects of immediate and delayed finishing/polishing procedures on the surface characteristics (surface roughness and hardness) of tooth‐coloured restoratives including a microfilled, a heavily filled and a polyacid‐modified composite resin and a resin‐modified glass–ionomer cement. Eighty‐four specimen discs were made for each material; the first 12 were used as controls and the remaining 72 specimens were randomly divided into two equal groups. The first group was finished/polished immediately after light polymerization and stored for 1 week in distilled water at 37 °C while the second group was finished/polished after 1 week storage in distilled water at 37 °C. Finishing and polishing was carried out using the following systems: Enhance ® system, white stones with Vaseline ® and Super‐snap ® disks system. The finished/polished surfaces were subjected to profilometric evaluation and microhardness testing. The effects of delayed finishing/polishing procedures on surface roughness and hardness appear to be both material and technique dependent. Delayed finishing/polishing of polyacid‐modified composite resins and resin‐modified glass–ionomer cements generally resulted in a smoother surface. The surface roughness of composite resins after finishing/polishing procedures were generally not influenced by the finishing/polishing time. For all materials, delayed finishing/polishing with the various techniques generally resulted in a surface of similar hardness to or harder than that obtained with immediate finishing/polishing and the control group.