Crystal ZR Zirconia Blank Zahnsply Rs.1,642.85 by Dental Trade Mart

PHYSICAL PROPERTIES:

PROPERTY                                           UNIT                                      VALUE

Density (after sintering)                      g/cm³                                      >6.0

TEC(25-500⁰C)                                      10^-6K^-1                                   10.5

Fracture toughness                              Mpam^1/2                              >8.0

Bending strength(Biax)                        Mpa                                      >1200(+_-200)

Young’s modulus                                   Mpa                                      >200

Vickers hardness(HVO.5)                     Gpa                                        1200

INDICATION

ZR dental zirconia is a zirconia – based dental material designed for the production of fixed dentures, i.e. especially for single crowns, fully anatomic crowns and/or bridges consisting of up to14* units. In the posterior tooth area, the interval between pillars may not amount to more than two pontics.  Cantilever pontics are permissible.

TERMINAL SINTERING

With the terminal sintering to fully density, the milled work piece (framework) attains its defi nite properties.  During the process it shrinks by a precisely defi ned factor. This requires the following procedure to be strictly complied with. The terminal sintering is carried out in a sintering furnace approved for the sintering of pre-sintered zirconia work pieces.

SINTERING PROGRAM:

CONSTRUCTION NOTES:

>Wall thickness: For Full- Ceramics dentures, the wall thickness of the crown should not fall short of 0.5 mm in terminally sintered condition.

>The geometry of the connectors is of utmost importance for the cracking resistance of zirconia frameworks. Therefore, the crosssection of the connectors must be as large as possible. For bridges it should not be less than 9mm².

>In the posterior tooth area, up to 2 pontics are permissible between two pillars.

>For avoidance of what is known as “chipping”, the crowns and bridges should correspond, in smaller scale, to the tooth to be replaced, so that the ceramics veneer can be provided with uniform strength.

>The framework is to be designed so that the vectors of the masticatory forces are not located in the marginal portions of the chewing surface.

>For the manufacture of dentures from JR^R dental Zirconia, only such machines, equipment, devices and tools may be used which are approved for the processing of pre-sintered zirconia blanks. During processing, neither coolant nor compressed air may be used.

>Please note the instructions in the operating manual of your milling system.

>Prior to further processing of the milled work pieces,they are to be tested for the following defects:

-Shiny areas on the surface

-Discolouration

-Breaking out of portions of material

-Cracks

>If any of the defects listed is found on any of the milled workieces (frameworks), no work pieces manufactured from the same blank may be processed further.

>For the colouring of the frameworks, all commercially available liquid dyes can be used according to instructions of the respective manufacturers.

Packaging: 1 Block Per Box

Alias : Dental Blanks, Blanks, Blocks, Zirconia Blocks, Zirconia, Cad-Cam, Dental Lab Blanks, Dentsply Zirconia Blanks, Multi-Layered Blanks, HT Blanks, Dentsply Blank, Dentsply, Blenks, Dental Blocks, Dental Crowns, Bridges, Inlay-Onlay, Veneers, Restorations.