priti®multidisc ZrO2 multicolor High Translucent – MAC Digital Dental Systems LLC

MATERIAL

Zirconium dioxide Type II, Class 4 (DIN EN ISO 6872)
Flexural strength > 650 MPa
High translucence of 49%
Brilliant aesthetics
CTE 10 ·10^-6 · K^-1
Thin wall thicknesses of 0.4 mm for single crowns in the anterior tooth area and 0.6 mm in the posterior tooth area
Precise edges and margins due to highly compacted material
Veneering possible with any ceramic mapped to the CTE of ZrO₂
Cross-batch color fidelity
Homogeneous block shading
Color can be reproduced at any time
Biocompatible

CONSTRUCTION

Systems must be constructed of the following specifications:		Crowns	Maryland-bridges	3-unit bridges
Minimum framework thickness	anterior	0.4 mm	0.4 mm	0.6 mm
Minimum framework thickness	posterior	0.6 mm	0.6 mm	0.6 mm
Connectors	anterior		6 mm²	6 mm²
Connectors	posterior		9 mm²	9 mm²
Framework design	Anatomically shaped (supporting veneer ceramics); fully anatomical

SINTERING
Recommendation for standard sintering:
Heating and cooling rate 10°C/min
Hold time 120 minutes at 1,450°C
Total sintering time approx. 7 hours

Recommendation on rapid sintering: (for bridges with up to 3 pontics)
Heating rate 10°C/min
Hold time 30 minutes at 1,500°C
Cooling rate 40°C/min
Total sintering time approx. 4 hours

Sintering together with other materials could cause unwanted changes in color and translucence. This applies particularly to materials processed using dye liquids. Sintering beads must also be replaced to avoid dye liquid residues.

It is particularly important to clean sintering furnaces that are contaminated by dye liquids before sintering a pre-shaded material for the first time. This prevents unpleasant surprises and allows optimum photo-optical results for the zirconium dioxide.

VENEERING
Any ceramic veneers recommended for zirconium dioxide ceramics may be used.

MILLING
Reduce feed rates during rough machining: The quality of milling depends on several factors including the machine, machining strategy, zirconium dioxide, etc. To ensure that you can achieve optimum milling results from the start with high translucence blanks, we recommend using a lower speed than with opaque materials during rough machining.

Job	Rough machining Occlusal/cavity	Rough machining Residual material
Tool diameter	2.5 mm	1.0 mm
Parameter:	↓	↓
Spindle speed	20,000-22,000 rpm	20,000-22,000 rpm
Feed rate	1,200-1,500 mm/min	1,000-1,300 mm/min
Infeed rate	1,000 mm/min	700 mm/min
Allowance	0.15 mm	0.15 mm
Tool path distance	1.00 mm	0.20 mm
Step down/step over	1.00 mm	0.50 mm

Coated milling tools: These offer the benefit of low wear with longer tool life.

ADJUSTMENTS
Any adjustments required to the sintered restorations once compacted must only be carried out using diamond-coated tools to prevent damage to the material caused by local overheating or exposure of the surface of the restoration to excessive force.

FIXING
Restorations can be cemented conventionally with a zinc phosphate or glass ionomer cement or with self-adhesive and fully-adhesive fixing material.

COLOR-CODING

Through the measurement of the restoration height an even more precise positioning and color assignment can be made to the appropriate blank height. The positioning data apply mainly to anteriors. For posteriors we recommend a lower position. This prevents fused cusp areas appearing too white. An additional positive effect is the warm base hue due to the fissure pits.

Restoration height	Blank height
8 mm - 11 mm	14 mm
10 mm - 13,5 mm	18 mm
12 mm - 15,5 mm	20 mm
14 mm - 19 mm	25 mm

pritidenta® Shades	Position	VITA classical®	VITA System 3D-Master®
	top	A1	2M1, 1M2, 2R1,5
A light	middle	A2	2M2
	bottom	A3	3M2
	top	A3,5	3R2,5
A dark	middle
	bottom	A4	5M3, 4L2,5
	top	B1
B light	middle
	bottom	B2	2L1,5
	top	B3	3L2,5
B dark	middle
	bottom	B4	3M3
	top	C1	3M1
C light	middle
	bottom	C2	3L1,5
	top	C3
C dark	middle		4L1, 5E30
	bottom	C4	5M1, 5M2
	top	D2
D light	middle	D3	4R1,5, 4R2,5
	bottom	D4	3R1,5, 4M1, 4M2, 4M3
	top		0M1,0M2
priti® bleach	middle		0M3
	bottom		1M1