Production and properties of tooth-colored yttria stabilized zirconia ceramics for dental applications

Kaplan, Melis
Kim, Soo Young
Öztürk, Abdullah
Dense zirconia stabilized with 3 mol% yttria ceramics were produced in disc shape by first cold isostatically pressing at 100 MPa and then sintering at 1450 degrees C at ambient laboratory conditions. Coloring was accomplished by immersion the discs in NiCl2, MoCl3, and NiCl2 + MoCl3 solutions for 5, 30, and 60 s. Different concentrations (0.1, 0.25, and 0.5 wt%) were applied to get the color of natural tooth. The density, color, microhardness, fracture toughness, compressive strength, and wear rate of the discs were measured to evaluate the suitability of the colored discs for dental applications. Color assessments were made by measuring CIE Lab L*, a*, b, and Delta E* values. Low temperature degradation of the samples was evaluated by aging sensitivity tests in autoclave for 2, 4, and 6 h. Results have shown that color produced depends on the kind and concentration of the colorant solution while time of immersion has no significant effect on coloring process. Coloring solutions containing 0.1 and 0.25 wt% MoCl3 provided clinically acceptable color with the Delta E* value ranging from 5.16 to 6.42 for dental applications.


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San, O; Abali, S; Hoşten, Çetin (Elsevier BV, 2003-01-01)
The possibility of producing ceramic powders suitable for the fabrication of microporous filters was investigated through the thermal treatment of the powder mixtures of a high-purity (99.09% SiO2) quartz and clinoptilolite type of natural zeolite. The quartz and zeolite, mixed in the ratio of 3:1 by weight, was wet ground in a ball mill, the powder was sieved on a 90-mum screen, and the undersize was dried and sintered in the powder form at the temperatures of 1000, 1100 and 1200degreesC for 7 h in an air ...
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Ipek, H; Ucbas, Y; Yekeler, M; Hoşten, Çetin (Elsevier BV, 2005-01-01)
The kinetics of batch dry grinding of binary mixtures of ceramic raw materials, namely quartz-kaolin, quartz-potassium feldspar and kaolin-potassium feldspar, from the feed sizes of -3.350 + 2.360, -2.000 + 1.400, -0.850 + 0.600, -0.500 + 0.355 and -0.300 + 0.212 mm have been determined using a Bond mill with a mixture of ball sizes of 38.10, 31.75, 25.40, 19.05 and 12.70 mm diameter and total mass of 22.648 kg. The Bond mill used was a size of 30.5 cm diameter, 30.5 cm length, with a total volume of 22,272...
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Composites of serpentine and polypropylene (PP) were prepared by twin-screw extrusion. Serpentine was collected as rocks from the Ankara-Beynam region and ground into powder with an average particle size of about 3 mu m for composite production. Both as-received (rock) and powdered serpentine were characterized. A silane coupling agent (SCA), gamma-aminopropyl triethoxy silane, was used for the surface treatment of serpentine. Mechanical properties of the composites were measured in terms of impact strength...
Effect of YF3 on the phase stability and sinterability of hydroxyapatite-Partially stabilized zirconia composites
Aykul, Anil; KUTBAY, IŞIL; Evis, Zafer; USTA, Metin (Elsevier BV, 2013-09-01)
Pure hydroxyapatite (HA), HA and partially stabilized zirconia composites (PSZ) with YF3 and HA-PSZ composite containing 5 wt% PSZ without YF3 were sintered in air at 900 degrees C, 1100 degrees C and 1300 degrees C for 1 h. The reactions and transformation of the phases in the composites were determined by X-ray diffraction. All the composites with or without YF3 showed desirable thermal stability below 1300 degrees C and besides various amounts of CaZrO3, any amount of tri-calcium phosphate (TCP) was not ...
Citation Formats
M. Kaplan, J. PARK, S. Y. Kim, and A. Öztürk, “Production and properties of tooth-colored yttria stabilized zirconia ceramics for dental applications,” CERAMICS INTERNATIONAL, pp. 2413–2418, 2018, Accessed: 00, 2020. [Online]. Available: