Polymerization capability of simplified dental adhesives with camphorquinone, phenyl-propanedione and bis-alkyl phosphine photoinitiators

• Main Authors: Boniek Castillo Dutra Borges (Author), Rodolfo Xavier de Sousa Lima (Author), Géssica Dandara Medeiros de Souza (Author), Ana Carla Bezerra de Carvalho Justo-Fernandes (Author), Letícia Virgínia de Freitas Chaves (Author), Eduardo José Carvalho Souza-Junior (Author), Isauremi Vieira de Assunção (Author)
• Format: Book
• Published: Universidade Estadual de Campinas, 2018-07-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.

Summary

Aim: this study aimed to evaluate the degree of conversion (DC) exhibited by novel formulations of dental adhesive systems including camphorquinone (CQ), phenyl-propanedione (PPD), and bis-alkyl phosphine oxide (BAPO) when cured by mono- or polywave light emitting diodes (LEDs). Methods: an adhesive model was formulated by mixing hydroxyethyl methacrylate (HEMA, 40 wt%) and bisphenol A glycidyl dimethacrylate (BisGMA, 60 wt%) in ethanol (30 wt%). Five materials were then formulated by adding the following photoinitiators: CQ (1 mol%), CQ/PPD (0.5/0.5 mol%), CQ/BAPO (0.5/0.5 mol%), PPD (1 mol%), and BAPO (1 mol%). The DC for each material was measured with Fourier transform infrared spectroscopy. Analysis of variance and Tukey's post-hoc test were used to analyze the data (p < 0.05). Results: Except for CQ, the photoinitiators provided a significantly higher DC in the adhesive systems following photoactivation with a polywave LED. Conclusion: The use of alternative photoinitiators and a polywave LED improved the DC of the adhesive systems examined.

Item Description

10.20396/bjos.v17i0.8652928
1677-3225