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Radiopacity of Posterior Restorative Materials: A Comparative In Vitro Study.

M Balci1, L S Turkun2, H Boyacıoglu3

  • 1Melin Balci, DDS, PhD, Ege University, Faculty of Dentistry, Department of Restorative Dentistry, Bornove, Izmir, Turkey.

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|April 20, 2023
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Summary

Amalgam exhibited the highest radiopacity among 11 posterior restorative materials. Alkasite and reinforced glass ionomers showed greater radiopacity than flowable composites, with material shade not impacting results.

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Area of Science:

  • Dental Materials Science
  • Radiology
  • Biomaterials

Background:

  • Radiopacity is crucial for evaluating restorative materials in dental imaging.
  • Understanding the radiopacity of commercial materials is essential for clinical selection.

Purpose of the Study:

  • To compare the radiopacity of 11 commercial posterior restorative materials.
  • To establish mean gray values (MGVs) and compare them with dental hard tissues.

Main Methods:

  • Prepared five-disc specimens for each of 11 restorative materials.
  • Measured MGVs using Adobe Photoshop and a 10-step aluminum stepwedge.
  • Utilized ANOVA and Dunnett T3 tests for statistical analysis (α=0.05).

Main Results:

  • Amalgam demonstrated the highest radiopacity.
  • Radiopacity of Cerasmart 270 (CS) approximated 1 mm aluminum (Al).
  • Alkasite (CN, EF2, E3) and reinforced glass ionomers (KM, EXB, EXD) showed higher radiopacity than enamel and posterior flowable composites (G2, GO2).

Conclusions:

  • All tested materials met ISO radiopacity requirements.
  • Alkasite and reinforced glass ionomers possess superior radiopacity compared to posterior flowable composites.
  • Material shade did not influence radiopacity measurements.