Influence of professional prophylaxis on reducing discoloration of different aesthetic restorative materials.
OBJECTIVE
Color match is one of the most important characteristics of aesthetic restorative materials. Integrity of the restoration and color stability throughout its functional duration are of paramount importance to ensure treatment longevity. These features, however, are not consistent among the different dental restorative materials. The purpose of this study was to evaluate the influence of professional prophylaxis on reducing wear discoloration of four aesthetic restorative materials after their immersion in coffee solution for 15 days.


METHODS
Seventy-one disc-shaped specimens (17 mm in diameter and 1mm thick) were fabricated and divided into five groups according to each restorative material: direct composite resin (G1: Tetric Ceram(®)), three indirect composite resins (G2: Targis; G3: Resilab Master; G4: belleGlassTM HP) and one ceramic system (G5: control: IPS Empress(®) 2). The specimens were immersed in coffee staining solution for 15 days at 37° ± 1°C in a dark environment. Afterwards, they were subjected to professional prophylaxis using sodium bicarbonate jet. Evaluations were made by means of a reflectance spectrophotometer, at three time-intervals: baseline, immediately after staining (15 days), and after prophylaxis. Data were subjected to two-way ANOVA and post hoc Tukey's test (α=0.05).


RESULTS
Significant difference was observed between G1/G3 and the other groups, between G2/G4 and the other groups, and between G5 and all the other groups.


CONCLUSIONS
It was concluded that G1 and G3 showed the greatest color changes, followed by G2 and G4, while G5 showed the smallest changes. Professional prophylaxis seemed to minimize the wear discoloration, which might result in increasing aesthetic restoration longevity.
Department of Dentistry, Ponta Grossa State University, Av. Carlos Cavalcanti, No. 4748, CEP 84030.900 Ponta Grossa, Paraná, Brazil. adrianasamra@bol.com.br
Adriana Postiglione Bührer
AP
Samra
Daniela Garcia
DG
Ribeiro
Christiane Philippini Ferreira
CP
Borges
Stella
S
Kossatz
D003069:Coffee / Q000737:chemistry; D003116:Color; D003188:Composite Resins / Q000737:chemistry*; D003764:Dental Materials / Q000737:chemistry*; D003776:Dental Porcelain / Q000737:chemistry*; D003777:Dental Prophylaxis / Q000379:methods*; D003902:Detergents / Q000737:chemistry; D004955:Esthetics, Dental; D005899:Glass Ionomer Cements / Q000737:chemistry; D006801:Humans; D018020:Lithium Compounds / Q000737:chemistry; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D012823:Silicate Cement / Q000737:chemistry; D017693:Sodium Bicarbonate / Q000737:chemistry; D013053:Spectrophotometry / Q000379:methods; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors
D003069:Coffee; D003188:Composite Resins; D003764:Dental Materials; D003902:Detergents; C118557:Empress 2; D005899:Glass Ionomer Cements; D018020:Lithium Compounds; D008689:Methacrylates; C121818:Tetric ceram; C110370:belleGlass; C111282:dental polyglass; D003776:Dental Porcelain; D012823:Silicate Cement; D017693:Sodium Bicarbonate