metal ceramic

crown

is made up of metal and ceramics metal is only thin layer on the stump ceramics are chemically bonded on the

metal construction

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

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

IMPRESSION OF THE UPPER AND LOWER JAWS

IN THE MOUTH -impression is made of SILICONE impression

material

MAKING MODELS-GIROFORM

SYSTEM-establishment

impression

use of giroform putty

everything must be horizontally placed

inserting plates

drilling of repositioned plate

apparatusfor drilling

repositioned plate with pins

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

vacuum mixer

casting the impression

applying drilled reposition plate with pins

finished model

cutup and treatment of stubs

remove of undercuts

application of varnish at 20 microns of thickness

appliction of Model Sealer for higher hardness of

cervical line

built-up models in the articulator

making and modeling of coping

connect of wax pins

wax pattern investing

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)

investmet material-belavest SH

distilled water

begosol HE

mixing:60 seconds under 1 bar

burning the waxat 950-

1050° for 30

minutes

casting high-melting alloys

Bego fornaxT casting machine

metal alloy - wirobond 280

remove of investment material

Renfert sandblaster

after sandblasting at 90 microns of aluminium oxide

grinding

sandblasting

Thickness on aproximal-0,3 mm

on occlusal 0,5 mm

wash opaquer-15 min, ivoclar Programat P500/G2

furnace at 930°

opaquer

the individual layer of ceramics

wash opaquer opaquer dentin enamel transparent glaze

application of ceramic material

burning of ceramics material

fitting on stump

grinding

second layer is for correction

burning of ceramics material at 900° for 1 min

grinding

glaze

FINISHED WORK