The Effect of Indirect Bonding Tray Material on Light Transmission and Degree of Conversion

Abstract

The purpose of this study was to determine whether varying thicknesses of a transfer-tray material employed in the indirect orthodontic bonding technique have an effect on the light transmission and degree of conversion of polymeric based composite, and specifically to measure the degree of conversion of three commercially available tray materials as a function of thickness and curing time. Methods: Three transfer-tray materials (Star VPS, Emiluma/Lumaloc, and Biocryl/Bioplast) were evaluated. Light transmission was tested using an integrating sphere (Labsphere) to obtain the attenuation coefficients for Star VPS and Emiluma/Lumaloc materials. The effect of tray materials on curing polymeric based composite was determined by measuring the degree of conversion of a 1.5mm flowable composite (Revolution, Kerr) after curing through varying thicknesses of tray material per brand, using a Fourier Transform Infrared Attenuated Total Reflection spectrometer (FTIR-ATR, Spotlight-400). The control group was the degree of conversion cured through varying distances/thicknesses of air without the presence of any tray material. Each composite sample per unique thickness of a tray material per brand was scanned uncured and then cured at 10,20, and 30 seconds. The materials, their thicknesses, and length of curing times were then compared to see how these factors affected the degree of conversion. Results: Star VPS has a statistically significant lower attenuation coefficient than Emiluma/Lumaloc. Comparing the three transfer-tray materials, the degree of conversion for curing through Biocryl/Bioplast had about 8 less polymerization than curing through the other tray materials. The degree of conversion of the composite after curing through Star VPS and Emiluma/Lumaloc was similar to the degree of conversion of the composite after curing through air.

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Document Details

Document Type
Technical Report
Publication Date
Jun 30, 2018
Accession Number
AD1128461

Entities

People

  • Christina L. Lilli

Organizations

  • Uniformed Services University of the Health Sciences

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption
  • Air Force
  • Composite Materials
  • Compound Semiconductors
  • Dentistry
  • Descriptive Analytics
  • Fabrication
  • Hardness
  • Light Emitting Diodes
  • Light Sources
  • Light Transmission
  • Materials
  • Mechanical Properties
  • Photons
  • Physical Properties
  • Scattering
  • Schools
  • Spectra
  • Spectroscopy
  • Statistical Analysis
  • Statistics
  • Teeth
  • Visible Spectra

Readers

  • Battery Technology and Engineering
  • Polymer Science and Engineering.