The effects of thickness and shade on translucency parameters of contemporary, esthetic dental ceramics.
feldspathic ceramic
hybrid ceramic
spectroradiometer
thickness
translucency
Journal
Journal of esthetic and restorative dentistry : official publication of the American Academy of Esthetic Dentistry ... [et al.]
ISSN: 1708-8240
Titre abrégé: J Esthet Restor Dent
Pays: England
ID NLM: 101096515
Informations de publication
Date de publication:
07 2021
07 2021
Historique:
revised:
20
02
2021
received:
01
06
2020
accepted:
04
04
2021
pubmed:
19
4
2021
medline:
23
7
2021
entrez:
18
4
2021
Statut:
ppublish
Résumé
To analyze translucency variations among four different contemporary esthetic ceramic systems having different shades and thicknesses. Ceramic specimens having different shades and translucencies were tested: leucite reinforced glass-ceramic (ECAD), conventional feldspathic ceramic (Noritake), zirconia reinforced lithium silicate glass-ceramic (Suprinity) and hybrid ceramic (Enamic). Specimens of 0.6, 0.9, 1.2, 1.5 and 2.0-mm thickness (n = 3/group, 615 total) were prepared. Translucency (TP) and Relative Translucency (RTP) Parameters were calculated from spectroradiometric color readings. Effects of shade and thickness for a given system were statistically analyzed using MANOVA and Tukey post-hoc multiple comparisons tests. Translucency variations were assessed comparatively with literature-based perceptibility and acceptability thresholds. TP/RTP values of all ceramic materials decreased with increasing thickness. The most translucent specimens were 0.6-mm thick ECAD HT-A3.5 (TP = 31.99) and ECAD HT-C2 (RTP = 23.75), while the least translucent was 2-mm thick Enamic T-3 M2 (TP = 7.27; RTP = 4.79). Thickness and material type significantly influenced translucency (p < 0.001). Noritake and ECAD LT showed similar translucency values, as well as Suprinity HT and ECAD LT. For ceramic restorations thicker than 0.9-mm, any thickness increase of 0.3-0.5 mm produces a perceptible but clinically acceptable translucency variation. Increases in thickness larger than 0.6-mm will result in an unacceptable translucency shift. Dental practitioners need to recognize key factors that influence translucency of ceramic restorations in order to choose the optimal material, shade, translucency, and thickness suitable for different clinical scenarios. While shade plays a minor role in translucency variation, ceramic type and restoration thickness significantly affect overall translucency.
Substances chimiques
Dental Porcelain
12001-21-7
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Pagination
795-806Subventions
Organisme : Ministerio de Ciencia, Innovación y Universidades
ID : PGC2018-101904-A-I00
Organisme : Unitatea Executiva pentru Finantarea Invatamantului Superior, a Cercetarii, Dezvoltarii si Inovarii
ID : PN-III-P1-1.1-PD-2016-0742
Organisme : Universidad de Granada
ID : A.TEP.280.UGR18
Informations de copyright
© 2021 Wiley Periodicals LLC.
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