Radiopacity of contemporary luting cements using conventional and digital radiography

Seo Young An, Chang Hyeon An, Karp Sik Choi, Kyung Hoe Huh, Won Jin Yi, Min Suk Heo, Sam Sun Lee, Soon Chul Choi

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Purpose: This study evaluated the radiopacity of contemporary luting cements using conventional and digital radiography. Materials and Methods: Disc specimens (N=24, n=6 per group, ø7 mm×1 mm) were prepared using 4 resinbased luting cements (Duolink, Multilink N, Panavia F 2.0, and U-cem). The specimens were radiographed using films, a complementary metal oxide semiconductor (CMOS) sensor, and a photostimulable phosphor plate (PSP) with a 10-step aluminum step wedge (1 mm incremental steps) and a 1-mm-thick tooth cut. The settings were 70 kVp, 4 mA, and 30 cm, with an exposure time of 0.2 s for the films and 0.1 s for the CMOS sensor and PSP. The films were scanned using a scanner. The radiopacity of the luting cements and tooth was measured using a densitometer for the film and NIH ImageJ software for the images obtained from the CMOS sensor, PSP, and scanned films. The data were analyzed using the Kruskal-Wallis and Mann-Whitney U tests. Results: Multilink (3.44-4.33) showed the highest radiopacity, followed by U-cem (1.81-2.88), Panavia F 2.0 (1.51- 2.69), and Duolink (1.48-2.59). The R2 values of the optical density of the aluminum step wedge were 0.9923 for the films, 0.9989 for the PSP, 0.9986 for the scanned films, and 0.9266 for the CMOS sensor in the linear regression models. Conclusion: The radiopacities of the luting materials were greater than those of aluminum or dentin at the same thickness. PSP is recommended as a detector for radiopacity measurements because of its accuracy and convenience.

Original languageEnglish
Pages (from-to)97-101
Number of pages5
JournalImaging Science in Dentistry
Volume48
Issue number2
DOIs
StatePublished - 1 Jun 2018

Keywords

  • Dental enamel
  • Dental materials
  • Dentin
  • Radiography

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