Colour stability of temporary restorations with different thicknesses submitted to artificial accelerated aging.
This study evaluated the colour stability of temporary prosthetic restorations with different thicknesses submitted to artificial accelerated aging. The occlusal surfaces of 40 molars were grinded to obtain flat enamel surfaces. Twenty acrylic resin specimens [Polymethyl methacrylate (Duralay) and Bis-methyl acrylate (Luxatemp)] were made with two different thicknesses, 0.5 mm and 1.0 mm. Temporary restorations were fixed on enamel and CIE L*a*b* colour parameters of each specimen were assessed before and after artificial accelerated aging. All groups showed colour alterations above the clinically acceptable limit. Luxatemp showed the lowest colour alteration regardless its thickness and Duralay showed the greatest alteration with 0.5 mm.
F D J
FD
Silame
R
R
Tonani
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CC
Alandia-Roman
M
M
Chinelatti
H
H
Panzeri
University of São Paulo, Ribeirão Preto Dental School, Department of Dental Materials and Prosthodontics, SP, Brazil.
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FC
Pires-de-Souza
D000134:Acid Etching, Dental / Q000379:methods; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D003116:Color; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding; D003743:Dental Enamel / Q000033:anatomy & histology; D003764:Dental Materials / Q000737:chemistry*; D003775:Dental Polishing; D003794:Dental Restoration, Temporary; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry*; D008768:Methylmethacrylates / Q000737:chemistry; D058105:Polymerization; D019904:Polymethyl Methacrylate / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D014466:Ultraviolet Rays
D003188:Composite Resins; D003764:Dental Materials; C444701:Filtek Z250; D008689:Methacrylates; D008768:Methylmethacrylates; D019279:Resin Cements; C098586:luxatemp; D017438:Bisphenol A-Glycidyl Methacrylate; C034578:Duralay; D019904:Polymethyl Methacrylate