The document discusses complete metal cast crowns. It defines them as artificial restorations that restore the coronal portion of a tooth. It lists advantages like great retention and resistance, and disadvantages like less conservative than partial coverage and inability to test pulp vitality. Indications include use as a bridge retainer or single crown for teeth excessively destroyed. Contraindications include use in anterior teeth if buccal/lingual walls are intact or if less than maximum retention is needed.

2. The Complete metal
cast crown
•
Full metal crown

3. Definition: It
is a metallic
artificial
restoration that
restores the
coronal portion of
the tooth in
function, contour
and anatomy

4. Advantages
1. Has great retention than
partial coverage.
2. Has great resistance form.
3. Has great strength.
4. The complete cast crown
allows the dentist to modify
axial tooth contour.
5. Easy modification of oclussion.

5. Disadvantages
1. Less conservative than partial
coverage.
2. Bad esthetic.
3. Doesn’t allow electric pulp
vitality test.

6. Indications

7. •
As a bridge retainer.
•
As a single crown
restoration.

8. •In endodontically treated
teeth.
Excessive destruction by
caries or truma

9. When maximum retention and resistance are
needed.
Short clinical
crown
Long span bridge

10. Correction of axial contour.
Buccaly inclined tooth Over erupted tooth

11. Indications
1. As a single crown restoration.
2. As a bridge retainer.
3. In posterior teeth.
4. Teeth excessively destroyed by caries
or trauma.
5. In endodontically treated teeth.
6. When maximum retention and
resistance are needed.
7. Correction of axial contour of
malaligned teeth.
8. Patients with high caries index and bad
oral hygiene.

12. Contraindications

13.  In anterior teeth.

14. Buccal
wall is
intact.

15. If less than maximum retention
and resistance are needed.
Long clinical crown short span bridge

16. contraindications
•
-In anterior teeth.
•
-When buccal wall or lingual wall is
intact.
•
-If less than maximum retention
and resistance are needed.
•
-When more conservative
restoration is indicated.

17. Alloys used in construction

18. 1) High noble Metal alloys; contains 60%
noble metal , 40% gold: Au-PL-Pd , Au-Pd, AU-
Ag-Pd
2) Noble Metal alloys; contains 25% noble
metal with no requirement of gold: Ag-Pd
3) Base Metal alloys ; contains less than 25%
noble metal; Ni-Cr, Co-Cr, Ti

19. Armamentarium

21. Steps of Preparation

22. 1) Occlusal Reduction

23. To create a uniform space between the occlusal
surface of reduced tooth and the opposing teeth.

26. Depth orientation
grooves

27. Using fissure bur or
rounded end
tapered diamond

28. In buccal and lingual
developmental grooves and
marginal ridges

29. Tooth structure between the grooves
is removed preserving the occlusal
configuration

31. Amount of reduction should be uniform to allow
adequate thickness of metal

33. To check the occlusal clearance
•
Utility wax
•
Reduction gauge
•
Registration material

45. To obtain an ideal axial preparation every
two opposing walls should be parallel to
each other with an occlusal convergancey
2-6 degrees

49. Undercut!!
Over-
convergence!!

50. 2) Axial Reduction

58. Finishing line
should be a replica
of half of the tip of
round ended of
tapered diamond
stone used.

59. Chamfer should
never be wider
than half of the tip
of stone used.
Otherwise a lip of
unsupported
enamel will be left!
(Gutter finishing
line)

60. Finishing line
1) Type;
Chamfer finishing line.
2) Thickness;
0.3 mm in case of base
metal alloy.
0.5 mm in case of noble
metal alloy.
3) Location;
Supragingival.
Subgingival.

62. It is located Supragingival in all
cases except;
1) Deep caries or erosion.
2) Restoration ( finishing line
should never be places on a
restoration).
3) Short crown.
4) Proximal contact area extend to
gingival crest.
5) Root sensitivity.

71. • Rounding of all line angles
• Continuity of finishing line (using end-cutting
bur)

72. FINISHED PREPARATION

73. FINISHED RESTORATION

74. Over tapering of opposing axial walls
result in reduced retention.
-To overcome this error, we either;
1) -Improve retention by adding
grooves
2) -Prepare a band of few mms of
tooth structure with restricted 6
degree
taper.