Shlinberg Casts and Die 87953473
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Transcript of Shlinberg Casts and Die 87953473
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WORKINGCAST
is the cast that is
mounted on an
articulator. To provide
the most accurate
articulation, itnormally should
represent the entire
arch
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REQUIREMENTSFORGOODCASTS
1. bubble free
especially along the finish lines of the prepared
teeth.
2. distortion free.3. trimmed
to insure access for carving wax pattern
margins.
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WORKING CAST WITHA
SEPARATE DIE
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WORKING CAST WITHASEPARATE DIE
disadvantages
wax pattern must be transferred from one to the
other
internal adaptation
obtained from
separate impressions
pouring an elastomeric full-arch impression twice
first cast is used for fabrication of the die
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IMPRESSION POURING
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DIE PREPARATION
Stone is added Tray is tilted
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DIE PREPARATION
Stone is added to theimpression
The die is first trimmed ona model trimmer
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DIE PREPARATION
handle is slightly largerthan preparation. Improperly trimmed die
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DIE PREPARATION
The handle should be 1inch long
The die is trimmed with anacrylic bur.
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DIE PREPARATION
Shaping near the finishline with a scalpel
The die is with the discoidend of a Tanner carver
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ERROR !!!
This die is too short, and it does notallow adequate access for marginfinishing.
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DIECONTOURSSHOULDBESIMILARTO
THOSEOFANATURALTOOTH
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DIE PREPARATIONAxial contours of the wax
pattern are influenced bydie trimming.
finish line on die outlined
with a red pencil.
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WORKING CAST WITHA
REMOVABLE DIE
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IFAREMOVABLEDIESYSTEMISUSED, IT
SHOULDSATISFYTHESEREQUIREMENTS17
The dies must return to their exact original
positions.
2. The dies must remain stable, even when
inverted.
3. The cast containing the dies must be easy to
mount on an articulator
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WORKING CAST WITHA REMOVABLE DIE
Most of these devices
can either be oriented
in the impressionbefore it is poured
attached to the
underside of a cast
that has already beenpoured
prepour technique post-pour technique
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WORKING CAST WITHA REMOVABLE DIE
1. Straight dowel pin
2. Curved dowel pin
3. Pindex system
4. Di-Lok tray 5. Accutrac
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TYPES
OFANTIR
OTATIONALDEVICE
S
USEDFORR
EMOVABL
EDIES
A, flat-sidedsingledowel;
B, single
curveddowel;
C, doublestraightdowels witha common
head;
D, twoseparateparalleldowels;
E, keyedplastic outertray
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STRAIGHT DOWEL PIN
Dowel pins positioned
over the impression
Paper clips are added to
nonremovable parts
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the ends of the dowel
pins are tapped to loosen
Base of die is trimmed
with an acrylic bur.
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Dies are reseated into the
cast
wax is removed from the
ends of the dowel pins.
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CURVED DOWEL PIN
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CURVED DOWEL PIN
The completed cast issawed
Segment is removed bypressing on the exposed tip
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CEMENTED CURVEDPIN
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CEMENTED CURVEDPIN
The working cast is trimmedto receive cemented dowels
Holes are drilled into the underside ofthe cast, under the indicated locations
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CEMENTED CURVEDPIN
The head of a curveddowel is seated
saw cuts after the base ispoured
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PINDEXSYSTEM
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PINDEXSYSTEM
The cast should be 15 mmthick
The periphery of the castis trimmed
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PINDEXSYSTEM
The palate/tongue areais trimmed
Location of the pin holesis marked with a pencil
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PINDEXSYSTEM
Pencil marks are placedunder illuminated dot
The thumbs are used to
stabilize the cast whilelifting the handle bar
with the fingers.
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PINDEXSYSTEM
Debris is removed pin holes refined
Shorter pins 1st Cyanoacrylate cement
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PINDEXSYSTEM
White sleeves > long pins bottom of cast is lubricated
Utility wax > long pins. gray sleeves are blocked
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PINDEXSYSTEM
A palatal/tongue filler The filler is placed on thecast
Boxing wax The filler is seated to the
cast
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PINDEXSYSTEM
Microstone is poured The base former filled
Model seated to base former Stone is vibrated on bottom
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PINDEXSYSTEM
Wax over the long pins isremoved.
The saw cuts are premarked
Dies are sectioned from the
underside
The cast is removed by tapping
the pins
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PINDEXSYSTEM
Dies may also sectioned from
the occlusal
A large condenser also be
used to loosen
cast should be poured in a U
shape, no stone in the center.The completed cast on the
articulator
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DI-LOKTRAY
The prepared tooth is broken
free from the cast
die is trimmed
The cast and tray mounted on
the articulator
The cast and die(s) are
reassembled in the tray
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