Effects of various finishing procedures on the staining of provisional restorative materials

The color stability of tooth-colored restorative materials for provisional restorations is of primary importance when provisional prostheses are worn long term. However, the effect of different polishing methods on the color difference of provisional restorative (PR) materials has not been completel...

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Bibliographic Details
Published in:The Journal of prosthetic dentistry 2005-05, Vol.93 (5), p.453-458
Main Authors: Guler, Ahmet Umut, Kurt, Safak, Kulunk, Tolga
Format: Article
Language:English
Subjects:
Acrylic Resins - chemistry
Bisphenol A-Glycidyl Methacrylate - chemistry
Coffee - chemistry
Color
Colorimetry
Composite Resins - chemistry
Dental Materials - therapeutic use
Dental Polishing - methods
Dental Restoration, Temporary
Dentistry
Diamond - therapeutic use
Humans
Polyurethanes - chemistry
Silicates - therapeutic use
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Summary:The color stability of tooth-colored restorative materials for provisional restorations is of primary importance when provisional prostheses are worn long term. However, the effect of different polishing methods on the color difference of provisional restorative (PR) materials has not been completely clarified. The purpose of this study was to investigate the effect of different polishing methods on color stability of 2- and 3-component autopolymerized bis-acrylic composites, a light polymerized composite, and a methyl methacrylate–based PR material upon exposure to a staining agent. Sixty cylindrical specimens (15 × 2 mm) were prepared for each of bis-acryl composites (Protemp II and Luxatemp), a light-polymerized composite (Revotek LC), and a methyl methacrylate–based (TemDent) PR material by using a brass mold. The specimens were divided into 6 groups (n=10), and different polishing procedures were used, including pumice (P), diamond polishing paste (Dpp), polishing discs (Pd), and combinations of these. Unpolished specimens served as the control. The specimens were stored for 48 hours at 37°C in a coffee solution. The color of all specimens was measured with a colorimeter (Minolta CR-300) before and after exposure, and color changes (ΔE) were calculated. The data were analyzed with a 2-way analysis of variance, and mean values were compared by the Tukey Honestly Significant Difference test (α=.05). The provisional materials, surface polishing procedures, and interaction were significant ( P
ISSN:0022-3913
1097-6841
DOI:10.1016/j.prosdent.2005.02.001