98*14mm Dental Zirconia Block

 

98×14mm dental zirconia block is a high-performance ceramic material used to make all-ceramic denture restorations, which is widely used in the dental field.

Application: Mainly used to make crowns, bridges, inlays, veneers and other restorations for dental fixed dentures.

Specifications: The specifications of this product are cylindrical ceramic blocks with a diameter of 98mm and a thickness of 14mm, which are suitable for various CAD/CAM systems.

Performance characteristics:

High strength: The bending strength can reach 600-1350MPa, which can withstand the chewing pressure in the mouth.

Good biocompatibility: Zirconia material has excellent biocompatibility to ensure the oral health of patients.

Excellent aesthetics: The transparency of zirconia is about 41-55%, which is close to the color and transparency of natural teeth, providing a natural and beautiful restoration effect.
Manufacturing raw materials
The main raw materials of dental zirconia blocks include:

Zirconia (ZrO₂): content ≥99%, as the main component.
Yttrium oxide (Y₂O₃): The content is 4.5% to 6.0%, which acts as a stabilizer to ensure the stable existence of tetragonal zirconium oxide at room temperature.
Hafnium oxide (HfO₂): The content is ≤5%, which exists as a trace element.
Aluminum oxide (Al₂O₃): The content is ≤0.5%, which can improve the mechanical properties of the material.
Other oxides: The content is ≤0.5%, which is used to adjust the material properties.
The precise ratio and purity of these raw materials have a direct impact on the performance of the zirconia block.

 

 

Type	Code	Translucency	Flexural strength	Color
White zirconia block	HT	41%	＞1200Mpa	white
	ST	43%	＞900Mpa
Monolayer preshaded zirconia block	HTC	41%	＞1200Mpa	A1.A2.A3
	STC	43%	＞900Mpa	A1.A2.A3.A3.5 A4. B1.B2.B3.B4 C1.C2.C3.C4 D2.D3.D4 BL1.BL2.BL3 BL4
3D Multilayer preshaded zirconia block	STM	≥Top-Bottom≥49%-≥43%	Top-Bottom ≥800Mpa-≥1100Mpa
	ATM	Top-Bottom≥55%-≥46%	Top-Bottom ≥600Mpa-≥900Mpa
3D multilayer preshade zirconia block(made of Tosoh zirconia powder)	TSTM	Top-Bottom≥43%-≥49%	Top-Bottom ≥800Mpa-≥1100Mpa
	TATM	Top-Bottom≥46%-≥55%	Top-Bottom ≥600Mpa-≥900Mpa

 

Technical parameters

Density before sintering	>3.15±0.05 g/cm³v
Density after sintering	>6.0 g/cm³
Linear expansion coefficient	(10.3±0.5)x10-6 K-1
Three point bending strength	≥600-1350Mpa(different type are different)
Translucency	41%-55%(different type are different)
Chenical solubility after sintering	<100 μg/cm2
Cytotoxicity test	Cytotoxicity 0 level
Redioactivity after sintering	<0.1 Bq/g
Sintering temperature	1480~1530°C,1520°C is recommend

 

 

Manufacturing process

Powder preparation: High-purity zirconium oxide powder is uniformly mixed with an appropriate amount of stabilizer (such as yttrium oxide) and other oxides to ensure the uniformity and stability of the material.

Molding: The powder is pressed into a regular-shaped blank by isostatic pressing or dry pressing. Isostatic pressing ensures the uniformity and density of the blank and improves the strength and durability of the restoration.

Pre-sintering: The blank is pre-sintered at 900-1100℃ to give it a certain strength for subsequent machining.

Machining: Use CAD/CAM technology to precisely cut the pre-sintered zirconia blank into the required shape of dental restorations.

Dyeing: According to the color requirements of the patient's teeth, the zirconia restoration is dyed to achieve the ideal aesthetic effect.

Final sintering: The dyed restoration is finally sintered at 1450-1600℃ to achieve the required density and mechanical properties.

Surface treatment: The sintered restoration is polished, glazed and other surface treatments are performed to improve its aesthetics and comfort.

 

 

 

 

 

 

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