Objectives: To evaluate the effects of six different finishing kits on surface roughness and gloss of seven different materials representing direct composite resins and indirect composite resin and ceramic blocks.

Methods: The finishing kits studied were:(1)Brassler Disks-BD,(2) Poli-Pro- PP,(3) Sof-Lex- SL,(4) Kenda- KD,(5) Jiffy- JF,and(6) Dialite- DL. The materials studied were in disc shape made from five direct resins (Filtek Supreme,Z-250,A110, Z100, Vitalessence,laboratory processed composite resin block (Paradygm-P) and a ceramic block (Vita Mark II-V). Surface roughness (Ra microns) and gloss (1-100 GU) were measured by using a profilometer (Talyscan 150 [Taylor Hobson Precision]) and gloss meter (Novo-Curve [Rhopoint Instrumentation Ltd]. P and V as received surface served as control. For direct composites, surface cured against mylar matrix for each material was used as the control. For each measurement(n=10) specimens of each material were used.

Results: Two-way ANOVA including factors for materials and method was used to analyze data on Ra and gloss. Tukey's HSD post-hoc analyses were used to determine significant inter-group differences (&alpha=.05). There were significant differences between type of material and method (P< .001 for all comparisons).

Conclusions: Excepting finishing with DL on P all finishing systems examined produced a surface smoothness which is beyond detection limit (<.5 microns) of the tongue [Jones CS,BDJ 196:42,2004]. For the direct composites, none of the finishing kits were capable of producing a gloss comparable to that of the control. With the exception of DL, all finishing kits improved gloss relative to the control; but KD on P resulted in gloss approaching that of mylar. Finishing with DL and KD resulted in far lower gloss values compared to its control (as received) and mylar control.

Back to the Dental Materials: VIII - Others-Non-metallic Program
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