title: Effect of diphenyliodonium hexafluorophosphate on the physical and chemical properties of ethanolic solvated resins containing camphorquinone and 1-phenyl-1,2-propanedione sensitizers as initiators.
abstract: To evaluate the effects of the diphenyliodonium hexafluorophosphate (DPI) on the physical and mechanical properties of solvated dental adhesive resins containing camphorquinone (CQ) and/or 1-phenyl-1,2-propanedione (PPD) as initiators.
  
  
  
  Model solvated resins containing bisphenol glycidyl methacrylate (BisGMA); triethyleneglycol dimethacrylate (TEGDMA); 1,3-glycerol dimethacrylate (GDMA); 2-hydroxyethyl methacrylate (HEMA); dimethylaminoethyl amine benzoate (EDAB) and ethanol were prepared. The resins were divided in 24 test groups according to the incorporated initiator systems (CQ-0.5 or 1mol%; PPD-0.5 or 1mol%; CQ+PPD-0.5 or 1mol%) as well the presence of DPI (0, 0.5 or 1mol%). Degree of conversion (using Fourier-transformed near infra-red spectroscopy), flexural strength and modulus by three point bending, cohesive strength and water sorption and solubility were measured. Data were statistically analyzed by one and two way ANOVA and Tukey's test (α=0.05).
  
  
  
  DPI increased the degree of conversion of all materials tested. Camphorquinone promoted higher degree of conversion than resins containing only PPD or CQ+PPD. Generally, the resins containing PPD+CQ with DPI presented higher flexural strength and modulus, cohesive strength, as well lower water sorption and solubility.
  
  
  
  The use of PPD combined with CQ can increase the physical properties of the solvated resins. DPI improved the monomer conversion of all experimental materials and can positively modulate most of the physical properties of the solvated resins.
authors.affiliation: Department of Restorative Dentistry, Piracicaba Dental School, State University of Campinas, Piracicaba, Av Limeira, 901 Mail Box 52, Piracicaba, Sao Paulo 13414-903, Brazil. Electronic address: diogodressano@gmail.com.
authors.forename: Diogo
authors.initials: D
authors.lastname: Dressano
authors.affiliation: Department of Restorative Dentistry, Piracicaba Dental School, State University of Campinas, Piracicaba, Av Limeira, 901 Mail Box 52, Piracicaba, Sao Paulo 13414-903, Brazil. Electronic address: alanrmp@yahoo.com.br.
authors.forename: Alan Rodrigo
authors.initials: AR
authors.lastname: Palialol
authors.affiliation: Department of Biomaterials and Oral Biology, Univ. of São Paulo School of Dentistry, Av. Prof. Lineu Prestes, 2227, São Paulo SP 05508-000, Brazil. Electronic address: tathy_ap@yahoo.com.br.
authors.forename: Thaty A
authors.initials: TA
authors.lastname: Xavier
authors.affiliation: Department of Biomaterials and Oral Biology, Univ. of São Paulo School of Dentistry, Av. Prof. Lineu Prestes, 2227, São Paulo SP 05508-000, Brazil. Electronic address: rrbraga@usp.br.
authors.forename: Roberto R
authors.initials: RR
authors.lastname: Braga
authors.affiliation: 3M ESPE Dental Products Division, 3M Company, 260-2A-10 3M Center, St. Paul, MN 55144, United States. Electronic address: jdoxman1@mmm.com.
authors.forename: Joe D
authors.initials: JD
authors.lastname: Oxman
authors.affiliation: University of Manchester School of Dentistry, Manchester M13 9PL, UK. Electronic address: david.watts@manchester.ac.uk.
authors.forename: David C
authors.initials: DC
authors.lastname: Watts
authors.affiliation: Department of Restorative Dentistry, Piracicaba Dental School, State University of Campinas, Piracicaba, Av Limeira, 901 Mail Box 52, Piracicaba, Sao Paulo 13414-903, Brazil. Electronic address: gimarchi@fop.unicamp.br.
authors.forename: Giselle Maria
authors.initials: GM
authors.lastname: Marchi
authors.affiliation: Dental Research Division, Paulista University, Rua Doutor Bacelar, 1212, CEP: 04026-002 Sao Paulo, Brazil. Electronic address: lima.adf@gmail.com.
authors.forename: Adriano Fonseca
authors.initials: AF
authors.lastname: Lima
mesh_terms: D001713:Biphenyl Compounds; D002164:Camphor / Q000031:analogs & derivatives; D047188:Chalcones; D003188:Composite Resins; D008422:Materials Testing; D008689:Methacrylates; D009861:Onium Compounds
chemical_list: D001713:Biphenyl Compounds; D047188:Chalcones; D003188:Composite Resins; D008689:Methacrylates; D009861:Onium Compounds; C031291:diphenyliodonium; C005044:hydroxyethyl methacrylate; D002164:Camphor; C553149:camphorquinone; C100349:1-phenyl-1,2-propanedione
keywords: Dental adhesives; Dental materials; Ethanol; Initiators; Mechanical properties