Radiopacity of contemporary luting cements using conventional and digital radiography
안서영, 안창현, Choi Karp-Sik, 허경회, 이원진, 허민석, 이삼선, 최순철,
소속 상세정보
안서영 ( An Seo-Young ) - Kyungpook National University School of Dentistry Department of Oral and Maxillofacial Radiology
안창현 ( An Chang-Hyeon ) - Kyungpook National University School of Dentistry Department of Oral and Maxillofacial Radiology
( Choi Karp-Sik ) - Kyungpook National University School of Dentistry Department of Oral and Maxillofacial Radiology
허경회 ( Huh Kyung-Hoe ) - Seoul National University School of Dentistry Department of Oral and Maxillofacial Radiology
이원진 ( Yi Won-Jin ) - Seoul National University School of Dentistry Department of Oral and Maxillofacial Radiology
허민석 ( Heo Min-Suk ) - Seoul National University School of Dentistry Department of Oral and Maxillofacial Radiology
이삼선 ( Lee Sam-Sun ) - Seoul National University School of Dentistry Department of Oral and Maxillofacial Radiology
최순철 ( Choi Soon-Chul ) - Seoul National University School of Dentistry Department of Oral and Maxillofacial Radiology
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 resin-based 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.
키워드
Dental Materials; Radiography; Dental Enamel; Dentin
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