Long-Term Volumetric Analysis of Composites Resins Stored in PBS

Abstract

Objective: To evaluate the volumetric change (polymerization shrinkage/hygroscopic expansion) of 4 bulk-fill restorative composites and 2 incremental/conventional fill composites over 60 days of storage in 0.2M physiologic phosphate buffered saline (PBS).Methods: Composite specimens (n=15) were created on keyed pedestals following manufacturer recommendations, and stored in PBS at 37 deg C until the appointed testing time. Volumetric measurements were recorded using a video imaging analysis instrument (AcuVol, BISCO Inc.). Volumetric measurements were captured at following intervals: pre-polymerized, immediate post-polymerized, 1, 3, 7, 14, 21 and 30 days. Statistical analysis: Friedman with post-step wise step-down test (p = 0.05) and Kruskal-Wallis with post stepwise step-down test (p =0.05).

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Document Details

Document Type
Technical Report
Publication Date
Jun 07, 2019
Accession Number
AD1127886

Entities

People

  • Joshua S. Grenier

Organizations

  • Uniformed Services University of the Health Sciences

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Air Force
  • Composite Materials
  • Dental Materials
  • Flexural Properties
  • Free Radicals
  • Hydrophobic Properties
  • Materials
  • Measurement
  • Mechanical Properties
  • Modulus Of Elasticity
  • Polymerization
  • Polymers
  • Residual Stress
  • Revolutions
  • Statistical Analysis
  • Stresses
  • Teeth

Readers

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  • Regression Analysis.