Indian Journal of Public Health Research & Development
  • Year: 2019
  • Volume: 10
  • Issue: 8

Effect of Composite Preheating on the Degree of Monomer Conversion, Polymerization Shrinkage and Micro Hardness of A Silorane based Composite-An In Vitro Study

  • Author:
  • Newbegin Selvakumar Gold Pearlin Mary1, Arunajatesan Subbiya2,, Paramasivam Vivekanandan3, Venkatachalam Prakash3, Dhakshinamoorthy Malarvizhi4, Suresh Mitthra5
  • Total Page Count: 6
  • Page Number: 1615 to 1620

1Senior Lecturer, Dept of Conservative dentistry & Endodontics, Sree Balaji Dental College and Hospital, Bharath Institute of Higher Education & Research, Chennai, India

2Professor & Head of The Dept Dept of Conservative dentistry & Endodontics, Sree Balaji Dental College and Hospital, Bharath Institute of Higher Education & Research, Chennai, India

3Professors, Dept of Conservative dentistry & Endodontics, Sree Balaji Dental College and Hospital, Bharath Institute of Higher Education & Research, Chennai, India

4Associate Professor, Dept of Conservative dentistry & Endodontics, Sree Balaji Dental College and Hospital, Bharath Institute of Higher Education & Research, Chennai, India

5Reader, Dept of Conservative dentistry & Endodontics, Sree Balaji Dental College and Hospital, Bharath Institute of Higher Education & Research, Chennai, India

*Corresponding author: -Dr. Arunajatesan Subbiya, M.D.S, Professor & Head, Dept of Conservative dentistry & Endodontics, Sree Balaji Dental College & Hospital, Bharath Institute of Higher Education & Research, Pallikaranai, Chennai, India, Ph: 9840197437 E Mail: drsubbiya@gmail.com

Online published on 26 September, 2019.

Abstract

The aim of this in-vitro study was to evaluate the effect of pre-heating on the degree of monomer conversion, polymerization shrinkage and micro hardness of a silorane based composite.

P90 low shrinkage composite was used for this study. A total of 30 samples were made and groups divided into A, B &C: Group A-the control group, Group B-the pre heated group, Group C-the pre cooled group. The degree of monomer conversion, polymerization shrinkage & micro hardness was measured using FTIR spectrometer, Stereomicroscope & Vickers hardness testing machine respectively. Statistical analysis was done using One way ANOVA and post hoc Dunnett test.

The mean values for degree of conversion, polymerization shrinkage and microhardness for groups A, B, C were the following: 63.22%, 74.61%, 46.80%; 0.25%, 0.36%, 0.26%; 65.79 MPa, 72.69 MPa, 67.01MPa respectively.

The silorane composite when pre heated there was a significant increase in the degree of conversion and microhardness. There was no significant difference in the polymerization shrinkage among the experimental groups.

Keywords

Degree of monomer conversion, micro hardness, polymerization shrinkage, pre heated, pre cooling, silorane composites