Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/46851
Title: Effect of hygiene maintenance procedures on surface roughness of composite restoratives
Authors: Yap, A.U.J. 
Wu, S.S.
Chelvan, S.
Tan, E.S.F.
Issue Date: 2005
Source: Yap, A.U.J.,Wu, S.S.,Chelvan, S.,Tan, E.S.F. (2005). Effect of hygiene maintenance procedures on surface roughness of composite restoratives. Operative Dentistry 30 (1) : 99-104. ScholarBank@NUS Repository.
Abstract: This study investigated the effect of various hygiene maintenance procedures on the surface finish of minifill (Filtek A110 [AO], 3M-ESPE), flowable (Filtek Flow [FF], 3M-ESPE) and polyacid-modified (F2000 [FT], 3M-ESPE) composites. Procedures included pumice-water slurry with rotating brush (PB), pumice-water slurry with rotating rubber cup (PC), prophylaxis paste with rubber cup (ZC), prophylaxis gel with rubber cup (GC) and air-powder polishing (AP). Specimens not exposed to these procedures were used as the control group. For each material, 48 specimens (3-mm long x 3-mm wide x 2-mm deep) were made and stored in distilled water at 37°C for one month. The specimens were then treated with 1200 grit sandpaper using a lapping device, stored for an additional two months in distilled water at 37°C and randomly divided into six groups (n=8). The mean surface roughness (Ra, μm) of the specimens after exposure to the various hygiene procedures was determined using a surface profilometer. Data was subjected to ANOVA/Scheffe's test at significance level 0.05. Mean Ra values ranged from 0.09 to 2.17, 0.06 to 1.38 and 0.38 to 1.25 for AO, FF and FT, respectively. The effect of hygiene procedures on surface roughness was material dependent. Among the various procedures, the smoothest surface was observed after treatment with prophylaxis gel and the roughest with air-powder polishing. For all materials, the use of pumice-water slurry with brush also caused significant roughening. Composite restorations may require re-polishing after exposure to some hygiene maintenance procedures, as Ra values exceeded the critical threshold surface roughness for bacterial adhesion (0.2 μm). © Operative Dentistry, 2005.
Source Title: Operative Dentistry
URI: http://scholarbank.nus.edu.sg/handle/10635/46851
ISSN: 03617734
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

Page view(s)

56
checked on Dec 15, 2017

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.