Surface texture of resin-modified glass ionomer cements: effects of finishing/polishing systems.
This study investigated the surface texture of two resin-modified glass ionomer cements (RMGICs) in the vertical and horizontal axis after treatment with different finishing/polishing systems. Class V preparations were made on the buccal and lingual/palatal surfaces of freshly extracted teeth. The cavities on each tooth were restored with Fuji II LC (GC) and Photac-Fil Quick (ESPE) according to manufacturers' instructions. Immediately after light-polymerization, gross finishing was done with 8-flute tungsten carbide burs. The teeth were then randomly divided into four groups and finished/polished with (a) Robot Carbides (RC); (b) Super-Snap system (SS); (c) OneGloss (OG) and (d) CompoSite Points (CS). The sample size for each material-finishing/polishing system combination was eight. The mean surface roughness (microm) in vertical (RaV) and horizontal (RaH) axis was measured using a profilometer. Data was subjected to ANOVA/Scheffe's tests and Independent Samples t-test at significance level 0.05. Mean RaV ranged from 0.59-1.31 and 0.83-1.52, while mean RaH ranged from 0.80-1.43 and 0.85-1.58 for Fuji II LC and Photac-Fil, respectively. Results of statistical analysis were as follows: Fuji II LC: RaV-RC, SS<OG & SS<CS; RaH-SS, CS<RC, OG; Photac-Fil: RaV- SS, CS<OG; RaH-SS<RC, OG & CS<RC (where < indicates significantly greater Ra values). Significant differences in RaV and RaH values were observed when Fuji II LC was finished with RC. The use of carbides (RC) and one-step rubber abrasive system (OG) for finishing/polishing of RMGICs is not recommended. Graded abrasive disk (SS) or two-step rubber abrasive (CS) systems should be used instead.
Yap
Adrian U J
AU
Department of Restorative Dentistry, Faculty of Dentistry, National University of Singapore, Republic of Singapore. rsdyapuj@nus.edu.sg
Tan
W S
WS
Yeo
J C
JC
Yap
W Y
WY
Ong
S B
SB
D000704:Analysis of Variance; D002244:Carbon / Q000737:chemistry; D003737:Dental Cavity Preparation / Q000379:methods; D003775:Dental Polishing / Q000295:instrumentation / Q000379:methods*; D003793:Dental Restoration, Permanent / Q000379:methods; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006801:Humans; D008027:Light; D011108:Polymers / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry*; D012117:Resins, Synthetic / Q000737:chemistry; D012408:Rubber / Q000737:chemistry; D013223:Statistics as Topic; D013499:Surface Properties; D017973:Tungsten Compounds / Q000737:chemistry
C079765:Fuji II LC cement; D005899:Glass Ionomer Cements; C081144:Photac-Fil; D011108:Polymers; D019279:Resin Cements; D012117:Resins, Synthetic; D017973:Tungsten Compounds; C002802:tungsten carbide; D002244:Carbon; D012408:Rubber