Diamond Systems Tritan Betriebsanleitung PDF herunterladen (Seite 8)

autocast universal

230 Casting System Crowns and bridges Stand 1.9. 03 A 1

Crowns and Bridges made of Titanium

1. Working with rematitan

Plus Investment

Material

Preparation

Waxing of crowns and bridges can be done with the usual

materials.

Crowns and bridges are waxed up in the usual way.

Minimum wall thickness 0,4 mm.

Fitting: Crown and Bridge Technique

Hints for wax up:

If thermoformed plastic copings are used, it is

advisable to remove the shortened spacer foil from

the plastic coping just before investing.

If a spacer is used, this should be applied some-

what more thickly in occlusal and incisal region of

the stone dies (approx. 0.1 mm). Remove the spacer

from the stone dies before fitting the cast.

The quality of the titanium casting depends, amongst

other things, on the correct choice of sprues and their

positioning.

Spruing System –

Single Crowns / Inlays (pictures A and B)

Single crowns and inlays are in principle waxed-up on a

runner bar. An individual pattern is also positioned on a

runner bar.

T-shaped main sprue, diameter 4 mm. Minimum distance

from the sprue cone to the runner bar 10 mm.

Runner bar diameter 4 mm. Main sprue attached to the

runner bar between two leads. Pattern leads diameter

3 mm, length 3 mm.

Each single crown must be sprued at the highest point.

Larger components, such as full-cast crowns, may also have

two sprues. Align the patterns such, that the sprue cone sits

centrally in the muffle.

Bridges (pictures C and D)

T-shaped main sprue  4 mm. Minimum distance from the

sprue cone to the runner bar 10 mm. Runner bar  4 mm.

Main sprue connected to the runner bar between two sprue

leads. Pattern leads  3 mm, length 3 mm.

Each bridge component must be sprued to the runner bar

at its highest point. Larger components, such as full crowns

etc., may also have 2 leads. Align the patterns such that the

sprue cone sits centrally in the muffle. Bridges that extend

over 8 or more members must have two 4 mm main sprues

to the runner bar.

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