CONSISTENCY MEASUREMENTS OF THREE COMMERCIAL AND FIVE NOVEL EXPERIMENTAL VINYL POLYSILOXANE (VPS) IMPRESSION MATERIALS

  • Shahab ud Din BDS, MSc., PhD (UK), Asst Prof, Dentistry and Allied Disciplines, Shaheed Zulfiqar Ali Bhutto Medical University, (SZABMU)/Pakistan Institute Medical Science PIMS, Islamabad
  • Sadia Khalid BDS, MDS, Dentistry and Allied Disciplines, Shaheed Zulfiqar Ali Bhutto Medical University, (SZABMU)/Pakistan Institute Medical Science PIMS, Islamabad
  • Sheharyar Akhtar Khokhar BDS, BSc, MCPS, FCPS, Dentistry and Allied Disciplines, Shaheed Zulfiqar Ali Bhutto Medical University, (SZABMU)/Pakistan Institute Medical Science PIMS, Islamabad
  • Sadiq Ali BDS, MDS, Assistant Professor, Central Park Medical College, Lahore
  • Shahreen Zahid Khan BDS, MPhil, Assistant Professor, Army Medical College, Rawalpindi
  • Mangala Patel BSc, MSc, PhD, Professor, Centre for Oral Bioengineering (Dental Physical Sciences Unit), Bart's and The London School of Medicine and Dentistry, Queen Mary University of London
Keywords: Impression materials, elastomers, vinyl polysiloxane, cross-linking agent, surfactant, consistency measurements

Abstract

The purpose of this study was to develop a medium bodied hydrophobic and hydrophilic experimental (Exp) vinyl polysiloxane (VPS) impression materials (ab initio) incorporating a novel cross-linking agent, tetra-functional (dimethylsilylorthosilicate (TFDMSOS) and a non-ionic surfactant, Rhodasurf CET-2, (ethoxylatedcetyl-oleyl alcohol), and to analyse their effects on consistency measurements and to compare it with commercial medium bodied VPS impression materials.

Five experimental formulations (Exp-I, II, III, IV and V) of VPS impression materials were developed. Three commercial VPS (Aquasil Ultra Monophase, Elite HD Monophase and Extrude) were used. The consistency measurements of five Exp materials were compared with each other and with three commercial VPS impression materials. The results were analysed with one-way ANOVA and post hoc Tukeys test using the SPSS PASW statistical 22 software.

The consistency measurements of the three brands of commercial VPS impression materials and Exp-I and II were not significantly different (p?0.05) from each other. The surfactant modified Exp VPS (Exp-III, IV and V) showed significantly lower consistency values than their controls (Exp-I and II) and all commercial products. It was also observed that by increasing the amount of the surfactant (Rhodasurf CET-2) there was a consistent decrease in the consistency for the experimental hydrophilic VPS (Exp-III, 31.200.78 mm; Exp-IV, 32.000.54; Exp-V, 31.000.62 mm) but these were not significant. The results for the average consistency measurements of all experimental materials prepared in the current study fulfil the criteria of ISO4823 for elastomeric impression materials for a medium-bodied impression material.

Published
2018-11-27
How to Cite
Din, S. ud, Khalid, S., Khokhar, S. A., Ali, S., Khan, S. Z., & Patel, M. (2018). CONSISTENCY MEASUREMENTS OF THREE COMMERCIAL AND FIVE NOVEL EXPERIMENTAL VINYL POLYSILOXANE (VPS) IMPRESSION MATERIALS. Pakistan Oral & Dental Journal, 38(3), 393-396. Retrieved from https://podj.com.pk/index.php/podj/article/view/302
Issue
Vol. 38 No. 3 (2018): July-September 2018
Section
Science of Dental Materials