POLYMERIZATION SHRINKAGE, DEGREE OF CONVERSION, DEPTH OF CURE, AND HEAT GENERATION OF NOVEL EXPERIMENTAL AND COMMERCIAL COMPOSITE

Authors

  • Saad Liaqat Department of Dental Materials, Institute of Basic Medical Sciences, Khyber Medical University, Peshawar, Pakistan
  • Humaira Jabeen Department of Dental Materials, Institute of Basic Medical Sciences, Khyber Medical University, Peshawar, Pakistan

DOI:

https://doi.org/10.33279/jkcd.v11i04.120

Keywords:

Commercial and control composites, polymerization shrinkage, depth of cure.

Abstract

Objective:

To compare and characterise commercial and control composites. By characterising these composites, target properties for new experimental dental composites can be outlined.

Materials and Methods:

Three commercial, and two experimental composites were compared and investigated. The composition of commercial materials were provided from published literature and manufacturer’s information. The changes in intensity of spectral peaks that were involved in free radical addition polymerization were used to determine the degree of conversion using FTIR (n=6). The samples were prepared in 1 mm, and 4 mm thickness and cured for 40 s from top. Depth of cure, Polymerization shrinkage and heat generation were determined using conversion data, and equations.

Results:

The conversion for Gradia, and Z250 were significantly lower than the flowable Vertise flow, and experimental composites C-HEMA, and C-4 META in both 1 mm, and 4 mm depth. The shrinkage, and heat generation values suggests opposite trends to conversion. With the highest shrinkage, and heat generation associated with Vertise flow. Depths of cure of all materials were in the range of 2.28 to 2.49 mm at 20 s, and 40 s cure.

Conclusion:

The experimental composite with added monomers had the potential to compete with commercially available composites, without compromising the properties.

Downloads

Published

2021-12-31

How to Cite

Saad Liaqat, & Humaira Jabeen. (2021). POLYMERIZATION SHRINKAGE, DEGREE OF CONVERSION, DEPTH OF CURE, AND HEAT GENERATION OF NOVEL EXPERIMENTAL AND COMMERCIAL COMPOSITE. JOURNAL OF KHYBER COLLEGE OF DENTISTRY, 11(04), 56–60. https://doi.org/10.33279/jkcd.v11i04.120

Issue

Vol. 11 No. 04 (2021): Journal of Khyber College of Dentistry

Section

Original Article

License

Copyright (c) 2021 Saad Liaqat, Humaira Jabeen

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

You are free to:

  1. Share — copy and redistribute the material in any medium or format
  2. Adapt — remix, transform, and build upon the material
  3. The licensor cannot revoke these freedoms as long as you follow the license terms.

Under the following terms:

  1. Attribution — You must give appropriate credit , provide a link to the license, and indicate if changes were made . You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
  2. NonCommercial — You may not use the material for commercial purposes .
  3. No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.