Comparative radiopacity of flowable resin composites

David F. Murchison, David G. Charlton, William S. Moore

Research output: Contribution to journalReview articlepeer-review

47 Scopus citations


Objective: This in vitro investigation aimed to determine the radiopacity of eight recently introduced "flowable" restorative resin composites and to compare their radiodensities to those of enamel, dentin, and a widely used composite marketed for universal application in anterior and posterior teeth. Method and materials: A total of 45 composite specimens were fabricated in cylindrical molds and exposed to a curing light for 120 seconds. Two methods were used to determine radiopacity: a transmission densitometer and a computer-assisted densitometric image analysis station. Results: Of the eight flowable resin composites tested, only three exhibited a radiopacity equal to or greater than that of enamel, a widely followed guideline for clinicians' diagnostic ability. The radiopacity of the remaining five materials'was not statistically significantly greater than that of dentin. Conclusion: The level of radiopacity of the tested flowable composites was variable; those with low radiodensity should be avoided in Class II restorations, where a clear determination of recurrent caries by the examining clinician could be compromised.

Original languageEnglish (US)
Pages (from-to)179-184
Number of pages6
JournalQuintessence international
Issue number3
StatePublished - Mar 1999
Externally publishedYes


  • Dental radiography
  • Radiodensity
  • Radiopacity
  • Resin composite

ASJC Scopus subject areas

  • Dentistry(all)


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