PDF herunterladen
Open Access
CC BY 4.0 · Eur J Dent 2022; 16(01): 167-172
DOI: 10.1055/s-0041-1731929
Original Article

Mechanical Properties of Experimental Composites with Different Photoinitiator

Authors

  • Luis Felipe Marques de Resende

    1   Department of Restorative Dentistry, University of Taubaté, Taubaté, São Paulo, Brazil

  • Anderson Catelan

    2   Department of Dentistry, Faculty of Health Sciences, University of Western São Paulo, Presidente Prudente, São Paulo, Brazil

  • Kusai Baroudi 

    3   School of Dentistry, University of Taubaté, Taubaté, São Paulo, Brazil

  • Alan Rodrigo Muniz Palialol

    4   Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil

  • Alexandre Marques de Resende

    5   Department of Restorative Dentistry, Federal University of Juiz Fora, Juiz de Fora, MG, Brazil

  • Ana Carolina Andreucci

    1   Department of Restorative Dentistry, University of Taubaté, Taubaté, São Paulo, Brazil

  • Rayssa Ferreira Zanatta

    1   Department of Restorative Dentistry, University of Taubaté, Taubaté, São Paulo, Brazil

  • Priscila Christiane Suzy Liporoni

    1   Department of Restorative Dentistry, University of Taubaté, Taubaté, São Paulo, Brazil

Funding None.
Weitere Informationen
Auch verfügbar auf
  Lizenzen und Reprints
Preview

Abstract

Objective The effect of different photoinitiators on mechanical properties of experimental composites was evaluated.

Materials and Methods Resin composites were formulated by using a blend of bisphenol A-glycidyl and triethylene glycol (50/50 wt%) dimethacrylate monomers, and 65 wt% of barium aluminium silicate and silica filler particles. Photoinitiators used were 0.2% camphorquinone (CQ) and 0.8% co-initiator (DMAEMA); 0.2% phenyl-propanedione and 0.8% DMAEMA; 0.1% CQ + 0.1% phenyl propanedione and 0.8% DMAEMA; 0.42% mono(acyl)phosphine oxide (MAPO); and 0.5% bis(acyl)phosphine oxide (BAPO). Specimens (n = 10) were light cured by using a multiple-emission peak light-emitting diode for 20 seconds at 1,200 mW/cm2 of irradiance and Knoop hardness and plasticization, depth of cure, flexural strength, and elastic modulus were evaluated. Data were statiscally analyzed at significance level of α = 5%.

Results Experimental composites containing MAPO and BAPO photoinitiators showed the highest values of flexural strength, elastic modulus, top surface hardness, and lower hardness reduction caused by alcohol compared with CQ. Composites containing CQ and PPD showed similar results, except for depth of cure and hardness of bottom surface.

Conclusion BAPO and MAPO showed higher flexural strength, elastic modulus, hardness on top surface, and lower polymer plasticization to CQ.

Keywords

resin composites - hardness - elastic modulus - photoinitiators


Publikationsverlauf

Artikel online veröffentlicht:
24. August 2021

© 2021. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution License, permitting unrestricted use, distribution, and reproduction so long as the original work is properly cited. (https://creativecommons.org/licenses/by/4.0/).

Thieme Medical and Scientific Publishers Private Ltd
A-12, Second Floor, Sector -2, NOIDA -201301, India