Development of monomeric blends containing methacrylates with elastomeric behavior...
| Grant number: | 16/12478-0 |
| Support type: | Scholarships in Brazil - Scientific Initiation |
| Effective date (Start): | October 01, 2016 |
| Effective date (End): | September 30, 2017 |
| Field of knowledge: | Health Sciences - Dentistry - Dental Materials |
| Principal Investigator: | Adilson Yoshio Furuse |
| Grantee: | Pedro Henrique Magão |
| Home Institution: | Faculdade de Odontologia de Bauru (FOB). Universidade de São Paulo (USP). Bauru , SP, Brazil |
Abstract The composition of dental adhesives may influence their performance. Different photoinitiators may be used, and type I photoinitiators are cationic and undergo unimolecular dissociation, without a synergist amine, while type II photoinitiators form free radicals by electron exchange with a coiniciador, which is usually an amine. This study aims to characterize experimental adhesives containing CQ/amine (type II/amine synergist); CQ/diphenyl iodonium hexafluorophosphate (Type II/Type I); or CQ/amine/diphenyl iodonium hexafluorophosphate (type II/amine synergist/type I) through analysis of the degree of conversion degree and water sorption and solubility. Adhesives will be manipulated with two monomer mixtures: Bis-GMA, TEGDMA, HEMA, BHT, and ethanol; or Bis-GMA, Bis-EMA, HEMA, BHT, and ethanol. To these compositions will be added CQ / DABE, CQ / iodonium salt or CQ / DABE / iodonium salt. The degree of conversion will be measured by FTIR-ATR and water sorption and solubility will be evaluated with a precision balance. Experimental adhesives will be photoactivated with two devices: LED curing unit with a broad spectrum of the conventional LED curing unit. Data will be analyzed by analysis of variance and possible correlations will be performed by linear and non-linear regression (± = 0.05). | |