title: Radio-opacity of core materials for all-ceramic restorations.
abstract: The aim of this study was to investigate and compare the radio-opacity of core materials for all-ceramic restorations, such as zirconia (NANOZR and Y-TZP) and alumina, against commercially pure titanium (cpTi) and aluminum. X-ray images were taken under general settings using an X-ray film. The X-ray film images were scanned using a digital scanner, and the darkness at the central area of each specimen image was quantitatively analyzed using an image analysis software. Amongst the materials investigated, alumina showed the most transparency against X-rays. Conversely, both types of zirconia showed the highest radio-opacity, whereby that of NANOZR was slightly lower than that of Y-TZP. This was because NANOZR contained 30 vol% of alumina and its density was also slightly lower than that of Y-TZP.
authors.affiliation: Department of Biomaterials Science, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima 890-8544, Japan. k2357241@kadai.jp
authors.forename: Yuji
authors.initials: Y
authors.lastname: Okuda
authors.forename: Makoto
authors.initials: M
authors.lastname: Noda
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kono
authors.forename: Motoharu
authors.initials: M
authors.lastname: Miyamoto
authors.forename: Hideo
authors.initials: H
authors.lastname: Sato
authors.forename: Seiji
authors.initials: S
authors.lastname: Ban
mesh_terms: D000537:Aluminum Oxide; D003287:Contrast Media; D003442:Crowns; D003776:Dental Porcelain; D008422:Materials Testing; D019252:Radiography, Dental, Digital; D014025:Titanium; D015040:Zirconium
chemical_list: D003287:Contrast Media; D003776:Dental Porcelain; D015040:Zirconium; D014025:Titanium; D000537:Aluminum Oxide; C028541:zirconium oxide