European Journal of Prosthodontics and Restorative Dentistry

cover art

Cover Date:
March 2018
Print ISSN:
0965-7452
Electronic ISSN:
2396-8893
Vol:
26
Issue:
1

The Influence of Nitrile Gloves on the Setting Behavior of Polyvinyl Siloxane Putty Impression Materials

Objective: The purpose of this study was to assess the gelation and polymerization time of three polyvinyl siloxane (PVS) putty materials and to determine if those times were affected by nitrile gloves under different conditions. Materials and Methods: Ten specimens (n=10) were obtained for each PVS putty material (Express STD, 3M ESPE; Extrude Xtra, Kerr and Exafast, GC) and tested under different conditions (gloves washed, gloves unwashed and hand contaminated). The gelation and polymerization time were measured using an oscillating rheometer and recorded for 400 s at 37°C to simulate the oral environment. Results: The mean gelation time of hand contaminated specimens was 157.50 minutes and was significantly slower than that by using nitrile washed gloves (mean=117.94, p=.004)
and by using unwashed gloves (mean=99.46, p<0.001). Unwashed gloves had significantly quicker gelation times compared to washed gloves (p=.046). The gelation time was significantly delayed with Exafast compared to Extrude Xtra and Express STD across all the different types of glove conditions (p<0.043). No significant differences were observed between polymerization time with Exafast and Extrude Xtra Putty. Conclusions: Extrude Xtra putty material had significantly better performance than GC Exafast and Express. Hand contaminated specimens were affected by the gelation/polymerization time.

Keywords
Impression
Setting Time
Poly Vinyl Siloxane
Impression Material
Vinyl Polysiloxane
Gelation

10.1922/EJPRD_01755Delgado06

Article Price
£15.00
Institution Article Price
£
Page Start
40
Page End
45
Authors
Dr. Alex J. Delgado, Dr. Silvia P Amaya-Pajares, Yu Su, Dr. Linda Behar-Horenstein, Dr. Terence Edward Donovan

Articles from this issue

  • Title
  • Pg. Start
  • Pg. End

  1. The Current Evidence on Retaining or Prosthodontically Replacing Retained Deciduous Teeth in the Adult Hypodontia Patient: A Systematic Review
  2. 2
  3. 15

  1. A Systematic Review and Meta-Analysis of Baseline Ohip-Edent Scores
  2. 17
  3. 23

  1. The Effect of Complete Denture Occlusion on Function and Patient Quality of Life: Systematic Review
  2. 24
  3. 30

  1. Marginal and Internal Gap of Handmade, Milled and 3D Printed Additive Manufactured Patterns for Pressed Lithium Disilicate Onlay Restorations
  2. 31
  3. 38

  1. The Influence of Nitrile Gloves on the Setting Behavior of Polyvinyl Siloxane Putty Impression Materials
  2. 40
  3. 45

  1. A Survey Exploring the Experiences & Attitudes of Dental Implant Clinicians in the Management of Peri-implantitis within the United Kingdom
  2. 46
  3. 52