or, rather, Valplast presents a greater amount of re- agents such as benzoyl peroxide.28 Some studies that compared the chromatic alterations of autopolymer-.
Sep 15, 2009 - silicone in many industries, and silicones 203 and 205 are proprietary Dow Corning formulations that have a higher refractive index than PDMS ...
BioMedical Engineering OnLine. December 2013 , 12:95 ... Keywords. HDPE HA Nano-composite DSC DMA Mechanical Accelerated aging Gamma radiation ...
Mar 10, 2010 - âAcid catalysis in bio-oil,â BioResources 5(2), 908-919. ... their corresponding acetals when reacted with methanol, ethanol, 1- .... butanol, respectively, in the presence of sulfuric acid catalyst. The reaction conditions were th
Clinical Relevance. While the studied cements behaved acceptably according to the color change index. (ÎE), they functioned differently in regards to opacity, ...
Xing Yan Huang ⢠Jiu Long Xie ⢠Jin Qiu Qi â¢. Jian Feng Hao ⢠Ni Zhou. Received: 29 November 2013 / Published online: 18 April 2014. à Springer-Verlag Berlin ...
Jul 15, 2015 - ABSTRACT. In-vitro dissolution studies for moxifloxacin hydrochloride and cefixime trihydrate from its combined tablet dosage form was.
May 2, 2012 - Those structures show semi-organic structure with high bond energy ... An advantage of silicon rubber material is the water proof ability caused ...
... sonic-activated bulk-fill resin composite (SonicFill, Kerr, Orange, CA, USA) was ... the depth of cure and mechanical properties might not be suitable for clinical ...
The corrosion resistance is improved by cold working, especially for the highly ... sandblasting subjected to the cold worked steel is only useful for surface ...
1983; Chiodelli et al 1986; Constantini et al 1994; Brow. 2000). Therefore ..... Harish Bhat M, Berry M J, Jiang J Z and Rao K J 2001 J. Non-. Cryst. Solids 291 93.
The samples in group 2 underwent a bleaching procedure with 15% carbamide peroxide for two weeks ..... Silva Costa SX, Becker AB, de Souza Rastelli AN, de.
Jul 10, 2013 - ... of aluminum casting alloys have virtually replaced iron and steel in several auto- ... cient of B319.2 and A356.2 type aluminum-silicon casting alloys, make them ...... (1984). 11. J. E. Davis, Aluminum and Aluminum Alloys, ASM Spe
Literature shows the importance of smear layer removal during or after the biomechanical preparation of the root canal with the association of chelating or.
May 13, 2013 - index of the germination rate according to Ellis and Rob- erts (1981), Wherease n ..... Ellis RH, Roberts EH (1981). The quantification of aging ...
Accelerated aging declines the germination characteristics of the maize ... unavoidable process in seed's life time and influenced ... cooking, where its high smoke point makes refined corn ... comparison test was used to determine significant.
Apr 27, 2011 - and Breakthrough Breast Cancer Research Unit; Paterson Institute for Cancer Research; School of Cancer, Enabling Sciences and Technology ...
Apr 27, 2011 - ... Stephanos Pavlides,1,2 Diana Whitaker-Menezes,1,2 Richard G. Pestell,1,2. Anthony ..... Witkiewicz AK, Dasgupta A, Sammons S, Er O,.
Jun 14, 2010 - temperature keeping for 1 h according to ASTM D1211-97 standard. ... device of tristimulus colorimeter according to ASTM D2244-07e1 standard. .... they were chosen to be regular-fiber, knotless, crack-free, exhibiting.Missing:
Author's Certificate (USSR) # 472782. 1975. .... SEM Annual Conference and Exposition: Experimental Mechanics in Emerging Technologies. Portland. Oregon.
microhardness values were observed in G1; G2 and G3 showed reduction of microhardness values. It was concluded that, after thermocycling, the tested ...
Lambrechts P, van Meerbeek B, Perdigão J, Gladys S,. Braem M, Vanherle G. ... Hughes JA, Jandt KD, Baker N, Parker D, Newcombe RG,. Eisenburger M, Addy ...
The smear layer is an amorphous film that is always formed by the action of endodontic instruments inside the root canal during chemomechanical preparation.3 ...
Associate Professor, Dental Research Center, Department of Operative Dentistry, Dental. School, Hamadan ..... Brazilian oral research. 2013;27(3):279-85.
Braz Oral Res. 2010 Jan-Mar;24(1):114-9 ... Goiato MC, Santos DM, Haddad MF, Pesqueira AA ... color alteration was calculated according to the CIE. L*a*b* ...
Prosthodontics
Prosthodontics
Effect of accelerated aging on the microhardness and color stability of flexible resins for dentures Marcelo Coelho Goiato(a) Daniela Micheline dos Santos(c) Marcela Filie Haddad(b) Aldiéris Alves Pesqueira(c)
Adjunct Professor, Graduate Program in Dentistry, Faculdade de Odontologia de Araçatuba, Unesp – Univ. Estadual Paulista, Araçatuba, SP, Brazil.
(a)
(c)
PhD Student; (b) MSc Student – Department of Dental Materials and Prosthodontics, Faculdade de Odontologia de Araçatuba, Unesp – Univ. Estadual Paulista, Araçatuba, SP, Brazil.
Abstract: Acrylic resins have been widely used due to their acceptable esthetics and desirable characteristics such as easy handling, good thermal conductivity, low permeability to oral fluids and color stability. Flexible resins were introduced on the market as an alternative to the use of conventional acrylic resins in the construction of complete and partial removable dentures. Although these resins present advantages in terms of esthetics and comfort, studies assessing chromatic and microhardness alterations of these materials are still scarce in the related literature. The aim of this study was to evaluate the chromatic and microhardness alterations of two commercial brands of flexible resins in comparison to the conventional resin Triplex when submitted to accelerated aging. The resins were manipulated according to manufacturers’ instructions and inserted into a silicone matrix to obtain 21 specimens divided into 3 groups: Triplex, Ppflex and Valplast. Triplex presented the highest microhardness value (p
