Influence of surface sealant agents on the surface roughness and color stability of artificial teeth.
BACKGROUND
Although various surface sealant agents are available and recommended for chairside polishing procedures, their effect on the surface roughness and color stability of denture teeth is not clear.


OBJECTIVE
The purpose of this in vitro study was to evaluate the effect of sealant agents on the surface roughness and color stability of various denture tooth materials.


METHODS
Eighty disk-shaped specimens were prepared for each type of denture tooth material (SR Vivodent, PMMA; Vitapan, reinforced-PMMA; SR Phonares II, composite resin). The specimens were assigned to 4 groups according to the surface treatment used (n=20): surface sealant agents (Palaseal; Heraeus Kulzer GmbH, Optiglaze; GC Corp Biscover; Bisco Inc) and a conventional laboratory polishing technique (control group). A thermal cycling procedure was applied for half of the specimens (n=10). The surface roughness (Ra) values of thermocycled and nonthermocycled specimens were measured with a profilometer. The CIELab color parameters of both thermocycled and nonthermocycled specimens were measured with a spectrophotometer at baseline and after 7-day storage in a coffee solution. The color differences were calculated from the CIEDE2000 (ΔE00) formula. Data were statistically analyzed with 3-way ANOVA and the Tukey HSD test (α=.05).


RESULTS
The type of tooth material, surface treatment technique, and their interactions were significant for Ra values, and each variable and their interactions were also significant for ΔE00 values (P<.05). Thermal cycling had a significant effect only on ΔE00 values (P<.05).


CONCLUSIONS
Palaseal and Optiglaze sealant agents provided smoother and more color-stable denture tooth surfaces than the conventional polishing technique. The use of the Biscover agent with SR Vivodent and Phonares II teeth increased the Ra values. The color of conventionally polished SR Vivodent and Phonares II teeth changed more with thermal cycling.
Assistant Professor, Department of Prosthodontics, Faculty of Dentistry, Bulent Ecevit University, Zonguldak, Turkey.
Onur
O
Şahin
Assistant Professor, Department of Prosthodontics, Faculty of Dentistry, Ordu University, Ordu, Turkey.
Doğu Ömür
DÖ
Dede
Assistant Professor, Department of Prosthodontics, Faculty of Dentistry, Bulent Ecevit University, Zonguldak, Turkey.
Ayşegül
A
Köroğlu
Associate Professor, Division of Restorative Sciences and Prosthodontics, College of Dentistry, The Ohio State University, Columbus, Ohio. Electronic address: yilmaz.16@osu.edu.
Burak
B
Yılmaz
D000180:Acrylic Resins / Q000737:chemistry; D020099:Coated Materials, Biocompatible / Q000737:chemistry*; D003069:Coffee; D003116:Color; D003188:Composite Resins / Q000737:chemistry; D003764:Dental Materials / Q000737:chemistry*; D003775:Dental Polishing / Q000379:methods; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D020366:Methylmethacrylate / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D053761:Nanocomposites / Q000737:chemistry; D019904:Polymethyl Methacrylate / Q000737:chemistry; D011140:Polyurethanes / Q000737:chemistry; D019946:Propylene Glycol / Q000737:chemistry; D013053:Spectrophotometry / Q000295:instrumentation; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D014093:Tooth, Artificial
D000180:Acrylic Resins; D020099:Coated Materials, Biocompatible; D003069:Coffee; D003188:Composite Resins; D003764:Dental Materials; D008689:Methacrylates; D011140:Polyurethanes; C029824:urethane dimethacrylate luting resin; D020366:Methylmethacrylate; D019946:Propylene Glycol; D019904:Polymethyl Methacrylate