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metal ceramic
crown
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is made up of metal and ceramics metal is only thin layer on the stump ceramics are chemically bonded on the
metal construction
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working procedure
1. impression of the upper and lower jaws in the mouth
2. making models-giroform system
3. cutup and treatment of stubs
4. built-up models in the articulator
5. waxing
6. wax pattern investing
7. casting high-melting alloys
8. cutting off casting pins
9. grinding of metal
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working procedure
10. sandblasting
11. application of ceramic materials
12. wash opaquer
13. opaquer
14. ceramic material
15. grinding
16. corrections
17. glaze
18. submission to the surgery and integration into patient's mouth
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IMPRESSION OF THE UPPER AND LOWER JAWS
IN THE MOUTH -impression is made of SILICONE impression
material
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MAKING MODELS-GIROFORM
SYSTEM-establishment
impression
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use of giroform putty
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everything must be horizontally placed
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inserting plates
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drilling of repositioned plate
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apparatusfor drilling
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repositioned plate with pins
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Mixing ratio
75 grams of plaster glass stone 17 ml of water Mixing 30 seconds manually and 30
seconds in vacuum mixer under 1 bar
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vacuum mixer
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casting the impression
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applying drilled reposition plate with pins
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finished model
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cutup and treatment of stubs
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remove of undercuts
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application of varnish at 20 microns of thickness
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appliction of Model Sealer for higher hardness of
cervical line
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built-up models in the articulator
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making and modeling of coping
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connect of wax pins
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wax pattern investing
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mixing ratio
investment material belavest -100 grams of belavest sh -10 ml of distilled water -15 ml of begosol (change in summer-20 ml of distilled
water and 25 begosol)
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investmet material-belavest SH
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distilled water
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begosol HE
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mixing:60 seconds under 1 bar
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burning the waxat 950-
1050° for 30
minutes
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casting high-melting alloys
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Bego fornaxT casting machine
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metal alloy - wirobond 280
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remove of investment material
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Renfert sandblaster
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after sandblasting at 90 microns of aluminium oxide
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grinding
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sandblasting
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Thickness on aproximal-0,3 mm
on occlusal 0,5 mm
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wash opaquer-15 min, ivoclar Programat P500/G2
furnace at 930°
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opaquer
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the individual layer of ceramics
wash opaquer opaquer dentin enamel transparent glaze
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application of ceramic material
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burning of ceramics material
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fitting on stump
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grinding
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second layer is for correction
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burning of ceramics material at 900° for 1 min
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grinding
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glaze
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FINISHED WORK