Laboratory Construction of the Framework

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Laboratory Construction of the Framework
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• ????? ???? ?? ??

????? ???? ???? ???? ?? ????? ???? ??! ! !
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RPD ??? ????

1. Design transfer
2. Blockout
3. Duplicating
4. Waxing
5. Spruing
6. Investing
7. Burnout and casting
8. Metal finishing

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1. Design transfer
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1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing

• master cast?
• ???? ?? ?? design ??
• relief pad? outline
• internal finishline
• ?? ?? ???? 1.52mm
• ????? surveying
• ???
• ?? ??? ?? clasp? terminal 1/3? ??? undercut ???
  ??? ???? ?
• ?? 0.001 inch(0.250mm)

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2. Blockout
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1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing

• design ? master cast? model gloss? ??
• cast sealing
• design preserving

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1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing

• No wax region
• ?????? ???? ??
• Guiding planes
• Rest seat
• Clasp arms

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1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing

• 0 blockout
• ???
• ???? ??/???? ???? ??
• Divergent blockout
• precision attachment

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1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing

• Ledge clasp arms? inferior border
• ?refractory? ???? wax-up?? plastic clasp pattern?
  ?? ???? ??
• clasp? inferior border? ???? ??? ?? ??(? 0.5mm)?
  ??????

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1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing

• relief pad
• meshwork ?? resin? ?? ??
• internal finishing line
• altered cast impression? ???? ?? ??
• ?? 1mm

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1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing

• framework ??? ??? ?? undercuts? blockout
• ??? agar? ?? ??

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3. Duplicating
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Duplicating flasks
1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing
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Duplicating
1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing
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Duplicating
1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing
stone / investment
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4. Waxing
???? ?? master cast? design? ??? casting? ???
??? ??!!!
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Preformed plastic patterns
1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing
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1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing
open retention mesh
plastic clasp form
anatomic replica pattern
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Wax pattern forming
1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing
Metal F.W. ? Casting? cast crown?? ???? ???
casting ??? ??? ?? ???, finishing? polishing?
????? wax? ?? ?? ? ?? ??? ??.
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1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing
Blocked out master cast
Refractory cast
Duplicate stone cast
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1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing
Penciled outline of framework
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Wrought-wire arm
1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing
18-G round wax strip
18-G W.W. arm
W.W.
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Lingual bar pattern
1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing
24-G sheet wax 6-G half pear shaped wax
Minor connector
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1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing
24-G sheet wax ? 2 steps ( B L )
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Occlusal rest Reciprocal component
1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing
Trough
14-G round wax
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Ladder loop
1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing
??? ?? ?? ?? ????
major connector?? ????
12-G half-round wax( ladder ) 18-G round wax(
loop )
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1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing
Butt joint
14-G round wax ????? butt joint??
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1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing
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Nail head
1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing
nail head 6? ( short span?? )
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1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing
direct retainer arm
W.W. retainer arm
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Completed wax pattern
1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing
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Weak spot
1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing
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1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing
??
??
stone cast
refractorycast
stone cast
stone cast
refractorycast
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Attaching W.W. by soldering
1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing
Electric soldering machine
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1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing
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5. Spruing

• ??? ???? ????? ???? ??? ??? ??? ??? ?? ??? ??
  ???? ?? ???? ??? ????.
• spruing? investing ?? wax-up? ??? ?? ?? ????.

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Spruing
1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing
8 G sprues
12 G sprues
sprue former
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6. Investing
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Investing
1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing
investment mold
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7. Burnout Casting
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?? 1.mold? ?? ?? 2.mold? wax pattern ???? ??
?? 3.???? ?? ??? ?? ??
1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing
Burnout
Casting
??? Cr-Co alloy? no pickling!!!
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8. Metal finishing
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1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing
Divesting with Al2O3
Gross finishing
high speed
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1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing
Electropolishing
Rubber polishing point
Cr-Co alloy? ??
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1. Design transfer 2. Blockout 3.
Duplicating 4. Waxing 5. Spruing 6.
Investing 7. Burnout and casting 8.
Metal finishing
High polishing ??
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Thank you for your attention!!!