Dentsply Sirona Cercon base Instrucciones De Uso página 8

Nesting
Special nesting notes for large-span bridges (9 units or more, only for Cercon® base / Cercon® ht)
For distortion-free sintering of long-span bridges (9 units or more) when nesting the object in a Cercon® base /
Cercon® ht 98 disk, make sure to add a sintering reinforcement in the form of a "tongue" to create
Always place objects (single copings, three-unit frameworks) within the sintering reinforcement (" tongue")
in order to achieve a homogeneous shrinkage of large-span objects during sintering
Entering the shrinkage factor for the milling unit:
In CAM software allowing the entry of 3 dimensions, enter X, Y and Z values
In CAM software allowing the entry of 2 dimensions, enter X or Y and Z values
In CAM software allowing the entry of 1 dimension, enter the X value
Finishing
Special notes on finishing:
Please read the respective Instructions for Use for your device regarding further processing
Separating
Notes on separating the objects:
Separate the objects from the disk by sandblasting with aluminium oxide (50 μm, max 15 bar)
For large-span bridges (9 units or more), separate only the labial and buccal sprues of the objects and the
"tongue" connector, because the objects must be sintered together with that "tongue" Any protruding ridges
at the bottom of the "tongue" must be removed in order to assure that the objects will stay firmly put on the
sintering tray The smaller objects nested inside the "tongue" are detached completely and sintered separately
Sintering
Sintering in the Cercon® heat plus P8:
• 1 500 °C in the Cercon® heat plus P8
– Program #4 for bridges up to 8 units ( Cercon® base / Cercon® ht), up to 3 units ( Cercon® xt),
T = 1 500 °C
max
– Program #5 for bridges of 9 units ( Cercon® base / Cercon® ht) or more, T
Special sintering notes for large-span bridges (9 units or more, Cercon® base / Cercon® ht)
Sintertray with sintering block
4
Correct position on the sintering tray
Two wide-span bridges (9 or more units) can be
sintered in the Cercon® heat plus P8 at one time
Place the objects on the sintering block with due regard
to the internal vertical clearance of the Cercon® heat
plus P8 (130 mm) and the need to facilitate contraction
without any mechanical constraints
= 1 500 °C
max