Objectives: Creating a tooth-like appearance by use of dental ceramics is still a challenge. Opalescence is a unique property of dental enamel, attempted to be mimicked by dental restorative materials. This study aimed to assess the effect of ceramic thickness on opalescence.
Materials And Methods: Twenty-four discs were fabricated of feldspathic ceramic, IPS e.max, zirconia and Enamic ceramics with 10 mm diameter and 0.5 and 1 mm thicknesses (n = 12). The opalescence of ceramic specimens was calculated by measuring the difference in yellow-blue axis (CIE ∆b*) and red-green axis (CIE ∆a*) between the transmitted and reflected spectra. One-way ANOVA was applied to compare the opalescence of different ceramic specimens with variable thicknesses at .05 level of significance.
Results: The opalescence of feldspathic, IPS e.max, zirconia and Enamic ceramic specimens with 0.5 mm thickness was 1.06 ± 0.15, 3.39 ± 0.15, 1.98 ± 0.15 and 1.44 ± 0.15, respectively. By increasing the thickness to 1 mm, the opalescence of feldspathic, IPS e.max, zirconia and Enamic ceramics changed to 1.12 ± 0.15, 1.47 ± 0.15, 3.85 ± 0.15 and 2.00 ± 0.15, respectively. In all groups except for IPS e.max, the mean opalescence of 1-mm-thick specimens was higher than that of 0.5-mm-thick specimens.
Conclusion: Type and thickness of ceramic affect its opalescence. The opalescence of all ceramic specimens tested in this study with 0.5 and 1 mm thicknesses was lower than that of the enamel.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7745071 | PMC |
| http://dx.doi.org/10.1002/cre2.325 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Properties of New Partially Crystallized Lithium Disilicate CAD-CAM Materials.
Oper Dent
January 2025
*Kraig S. Vandewalle, DDS, MS, Col (ret), USAF, DC, Air Force Consultant in Dental Research Advanced Education in General Dentistry Residency, AF Postgraduate Dental School, Joint Base San Antonio - Lackland, TX, USA; Uniformed Services University of the Health Sciences, Bethesda, MD, USA.
Objective: The purpose of this study was to compare the optical, mechanical, and biological properties of two new, inexpensive lithium disilicate (LS2) materials (Lodden (LOD), LD Medical Technology; and BeautyZir (BZ), BeautyZir Technology) to a clinically established LS2 material (IPS e.max CAD (EMAX), Ivoclar Vivadent).
Methods And Materials: The optical properties of the translucency parameter (TP) and opalescence parameter (OP) were obtained with a dental spectrophotometer.
Repair Bond Strength of Composite Resin to Dental Ceramic Using Various Surface Treatments: An Study.
J Int Soc Prev Community Dent
October 2024
Department of Conservative Dentistry, College of Dentistry, University of Mosul, Mosul, Iraq.
Aim: This research aims to evaluate and compare the effect of various surface treatments and adhesive types on the bond strength between composite resin and two types of ceramic materials.
Materials And Methods: A total of 98 disk-shaped of 10 mm diameter and 4 mm thickness were fabricated for each of the zirconia (H. C.
Effect of thermomechanical aging on marginal fit of three CAD-CAM restorative materials: An in vitro study.
J Dent Res Dent Clin Dent Prospects
September 2024
Crown and Bridge Department, Faculty of Dental Medicine, Al Azhar University, Assiut, Egypt.
Background: The present study assessed the impact of thermomechanical aging on the marginal fit of hybrid ceramic, reinforced composite resin, and lithium disilicate ceramic.
Methods: Eighteen human upper first premolars freshly extracted for orthodontic purposes were used to fabricate 18 CAD-CAM veneers and divided into three groups based on materials used: group H (n=6): hybrid ceramics (Vita Enamic), group R (n=6): reinforced composite resin (Brilliant crios), and group L (n=6): lithium disilicate ceramic (IPS e-max CAD). Each material's cementation procedure was carried out according to the manufacturer's instructions.
Do all ceramic and composite CAD-CAM materials exhibit equal bonding properties to implant Ti-base materials? An Interfacial Fracture Toughness Study.
Dent Mater
October 2024
Department of Fixed Prosthodontics, Institute of Dentistry, University of Liège Hospital (CHU), Liège, Belgium. Electronic address:
Objectives: To compare the interfacial fracture toughness (IFT) with or without aging, of four different classes of CAD-CAM ceramic and composite materials bonded with self-adhesive resin cement to titanium alloy characteristic of implant abutments.
Methods: High translucent zirconia (Katana; KAT), lithium disilicate-based glass-ceramic (IPS. emax.
Effect of polishing and bleaching on color, whiteness, and translucency of CAD/CAM monolithic materials.
J Esthet Restor Dent
July 2024
Department of Dental Materials and Prosthodontics, Araraquara Dental School, UNESP-Univ. Estadual Paulista, Araraquara, São Paulo, Brazil.
Article Synopsis
- The study aimed to assess how polishing and bleaching affect the brightness, color, whiteness, and translucency of different CAD/CAM dental materials after they were stained with coffee.
- Various treatments were applied to disks made from specific materials, with measurements taken before and after coffee exposure, and the results were analyzed statistically.
- Ultimately, the findings indicated that the effectiveness of these treatments in restoring desired properties varies based on the specific material used.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!