Field of Research: Prosthodontics
Name of author (s): Rafat Amer, Duygu Kürklü, Elham Kateeb, and Robert R. Seghi
Title of published work: Three-body wear potential of dental yttrium-stabilized zirconia ceramic after grinding, polishing, and glazing treatments
Name of Journal: The Journal of Prosthetic Dentistry
Year: 2014
Volume: 112, Issue 5
Pages: 1151–1155
Publisher’s name and address: Elsevier B.V.
Abstract:
STATEMENT OF PROBLEM:
Zirconia complete-coverage crowns are being widely used as restorations because of their improved esthetic characteristics. Data about the enamel wear potential of this ceramic after chair side adjustments are sparse.
PURPOSE:
The purpose of this study was to investigate the 3-body wear of enamel opposing 3 types of ceramic (dense sintered yttrium-stabilizedzirconia; Crystal Zirconia; DLMS) (Z), a lithium disilicate (IPS e-max CAD; IvoclarVivadent) (E), and a conventional low-fusing feldspathic porcelain (VitaVMK-Master; Vita Zahnfabrik) (P), treated to impart a rough, smooth, or glazed surface.
MATERIAL AND METHODS:
Twenty-four specimens of each of the zirconia and the lithium disilicate ceramic were sectioned from computer-aided design and computer-aided manufacturing blocks into rectangular plates (15×12×2 mm). Twenty-four specimens of the feldspathic porcelain were formed into disks (12 mm diameter) from powders compressed in a silicone mold. All specimens (n=72) were prepared according to the manufacturers' recommendations. Specimens of each ceramic group were placed into 1 of 3 groups: group R, rough surface finish; group S, smooth surface finish; and group G, glazed surface finish. A total of 9 groups with 8 specimens each were placed in a 3-body wear simulator, with standardized enamel specimens (n=72) acting as the substrate. The wear of the enamel specimens was evaluated after 50 000 cycles. The data were analyzed with 2-way ANOVA and the Tukey HSD multiple comparison test (α=.05).
RESULTS:
The data showed that the smooth zirconia group (ZS) was associated with the least amount of enamel wear (1.26 ±0.55 mm2). The most antagonistic enamel wear was associated with the glazed groups ZG (5.58 ±0.66 mm2), EG (3.29 ±1.29 mm2), and PG (4.2 ±1.27 mm2).
CONCLUSIONS:
The degree of enamel wear associated with monolithic zirconia was similar to conventional feldspathic porcelain. Smoothly polishedceramic surfaces resulted in less wear of antagonistic enamel than glazing.
Contact details of contact author/co-author at AQU:
Name: Elham Kateeb, PhD.
Address: Al Quds University, School of Dental Medicine
E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Other similar links in this field:
Wear performance of monolithic dental ceramics with different surface treatments.[Quintessence Int. 2013]
Antagonist wear of three CAD/CAM anatomic contour zirconia ceramics.[J Prosthet Dent. 2014]
The wear of polished and glazed zirconia against enamel.[J Prosthet Dent. 2013]
The wear of polished and glazed zirconia against enamel. Janyavula S, Lawson N, Cakir D, Beck P, Ramp LC, Burgess JO.J Prosthet Dent. 2013 Jan; 109(1):22-9.
Wear evaluation of the human enamel opposing different Y-TZP dental ceramics and other porcelains. [J Dent. 2012]
Wear of ceramic and antagonist--a systematic evaluation of influencing factors in vitro. [Dent Mater. 2008
