Radiopacity evaluation of different types of resin restorative materials using a digital radiography system


Oral Radiology, vol.39, no.4, pp.646-653, 2023 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 39 Issue: 4
  • Publication Date: 2023
  • Doi Number: 10.1007/s11282-023-00679-6
  • Journal Name: Oral Radiology
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, CINAHL, EMBASE, MEDLINE
  • Page Numbers: pp.646-653
  • Keywords: Aluminum step wedge, Digital radiography, Radiopacity, Resin composites
  • Istanbul Medipol University Affiliated: Yes


Objectives: The aim of the study was to evaluate and compare the radiopacity of 20 current dental resin composites with digital radiography. Methods: Ten specimens, 10-mm in diameter and 1-mm thickness, were prepared and radiographed using phosphor plates close to Al step wedges and tooth sections. The mean grey values (MGVs) were measured using an ImageJ software program and converted to equivalent Al thickness. Data were analyzed using one-way analysis of variance (ANOVA) and Tamhane post hoc test (p < 0.05). Correlation between mean radiopacity and filler content (wt% and vol%) of the tested materials was analyzed with linear regression analysis. Results: The radiopacity of all composites ranged from 1.32 mm Al (Estellite Flow Quick) to 3.41 mm Al (Charisma Classic). All the tested materials, except four restorative materials, had a radiopacity equal or higher than the enamel (p < 0.05). Linear regression revealed low correlation between the radiopacity and filler content of the composite. Conclusion: Majority of the materials has appropriate radiopacity for dental restorations. There was great variation in radiopacity level, may clinically affect the diagnosis.