Presentation consist of prepration design and impressions for indirect restoration for ceramic inlays and onlays

1. CERAMICS
Presented by
K.Chamini
Guided by
Dr.Sreeha
Reader

2. CONTENTS
• INTRODUCTION
• HISTORY
• CLASSIFICATION
• COMPOSITION
• PROPERTIES
• POSTERIOR PARTIAL COVERAGE RESTORATIONS
INLAYS
ONLAYS
• INDIVIDUAL CERAMIC CROWNS FOR TEETH
• REFERENCES

3. History
• Chinese were the first to introduce porcelain in
1000A.D.
• D’Entrecolles is first person to use porcelains in
the dentistry.
• Dental porcelains were used first to fabricate the
complete dentures.
• The technology for the metal ceramics introduced
in 1950’s
• Dechaeteau 1775 was the first person to make a
pair of complete dentures for himself.

4. History
• Italians in 1808 made porcelain teeth.
• Claudius Ash 1985 created an artificial tooth that
could be placed over the complete dentures &
fixed partial dentures.
• Charles Land 1889 developed porcelain jacket
crown

5. Classification
• According to use or
indication (Phillips)
Anterior
Posterior
Crown
Veneers
Post and core
FPD’s
Stain ceramic
Glaze ceramic
 According to
composition
Pure alumina
Pure zirconia
Silica glass
Leucite based glass
ceramic
Lithia based glass
ceramic

6. Classification
• According to
firing
temperature
Ultra low fusing
Low fusing
Medium fusing
High fusing
 According to
microstructure
Glass
Crystalline
Crystal containing
glass

7. Classification
• According to
translucency
Opaque
Translucent
Transparent
 According to
application
Core porcelain
Enamel porcelain
Dentin porcelain
 According to
method of firing
Air fired
Vacuum fired

8. Classification
• According to Van Noort
Metal ceramics
Reinforced ceramic core
systems
• Alumina reinforced PJC’s
• Glass infiltrated high
strength ceramics
• Pure alumina cores
Resin bonded ceramics
 According to Craig
All ceramic
• Machined
• Slip cast
• Heat pressed
• Sintered
Ceramic metal
• Sintered
Denture teeth
• Manufactured

9. Posterior partial coverage restorations:
inlays and onlays
Dental ceramics
Silicate glass ceramics
High strength oxide
ceramics
•Feldspathic veneering ceramics
•Leucite based veneering ceramics
•Leucite reinforced glass ceramics
•Lithium disilicate glass ceramics
•Aluminium and zirconium oxide
•Composite based ceramics

10. Posterior partial coverage restorations:
inlays and onlays
•Feldspathic veneering ceramics
•Leucite based veneering ceramics
•Leucite reinforced glass ceramics
•Lithium disilicate glass ceramics

11. Posterior partial coverage restorations:
inlays and onlays
Indications
Small to moderate carious lesions
Large carious or traumatic lesions with undermined
enamel
Endodontically compromised tooth
Teeth where it is difficult to develop retention form
Metal allergy
Opposite restoration is porcelain

12. Posterior partial coverage restorations:
inlays and onlays
Contraindications
Parafunctional habits
Aggressive wear of dentition
Technique sensitivity
•Maintaining a dry field
•Attention to detail in placement

13. Posterior partial coverage restorations:
inlays and onlays
Advantages Disadvantages
Colour Technique sensitivity, increased time
expensive
Periodontal health Strength of the individual unbonded
restoration is low
Resistance to abrasion Lab fee added factor
Radiodensity Potential wear of teeth in the other
arch

14. Posterior partial coverage restorations:
inlays and onlays
Preparation design
Inlay preparation design
1. Removal of old restorations and/or caries
2. Isolation
3. Components of preparation design
a. Pulpal floor
b. Axial wall
4. Finish line
a. Well defined, smooth butt joint
b. Hollow ground chamfer
5. Internal line angles

15. Posterior partial coverage restorations:
inlays and onlays
Preparation design
Inlay preparation design
1. Pulpal floor
2. Taper
Slightly more divergent than cast metal inlay
5-15 degrees
RMGIC FOR UNDERCUTS

16. Posterior partial coverage restorations:
inlays and onlays
Preparation design
Inlay preparation design
Finish line Well defined, smooth butt joint
OR
Hollow ground chamfer ???????

17. Posterior partial coverage restorations:
inlays and onlays
Preparation design
Inlay preparation design
Rounded internal
line angles

18. Posterior partial coverage restorations:
inlays and onlays
Preparation design
Full veneer preparation design

19. Posterior partial coverage restorations:
inlays and onlays
Inlay v/s Onlay

20. Posterior partial coverage restorations:
inlays and onlays
Preparation design
Computer aided design/computer aided manufacture
Restoration is
milled out of a
ceramic piece
•Elimination of lab procedure
•Improvement of properties
•Less porosity
•Extremely expensive
CAD-CAM system
3-D video camera
Electronic Image
processor
Three axis of
rotating milling
machine
Computer
component and
screen of CEREC

21. Individual Ceramic Crowns For Teeth
Particle filled glass
Polycrystalline
ceramics
Feldspathic ceramics
Synthetic ceramics
Glass infiltrated ceramics
Aluminium oxide ceramics
Stabilized zirconia ceramics

22. Individual Ceramic Crowns For Teeth
Translucency
Occlusal forces

23. Individual Ceramic Crowns For Teeth
Material properties
Fracture toughness
Hardness
Modulus of elasticity
Strength
Implications

24. Individual Ceramic Crowns For Teeth
Indications
1. High Esthetic requirement
2. Considerable proximal caries
3. Incisal edge reasonably intact
4. Endodontically treated teeth with post
and core
5. Favourable distribution of occulusal load
Contraindications
1. When superior strength is warranted
2. High caries index
3. Insufficient coronal tooth structure for
support
4. Thin tooth faciolingually
5. Bruxism
Full ceramic crowns

25. Individual Ceramic Crowns For Teeth
Anterior
Armamentarium
1. Handpiece
2. Flat-end tapered diamond
3. Small wheel diamond
4. H158-012 radial fissure bur
5. RS- 1 binangle chisel
Full ceramic crowns

26. Individual Ceramic Crowns For Teeth
Anterior
Full ceramic crowns

27. Individual Ceramic Crowns For Teeth
Anterior
Full ceramic crowns

28. Individual Ceramic Crowns For Teeth
Anterior
Full ceramic crowns

29. Individual Ceramic Crowns For Teeth
Anterior
Full ceramic crowns