Your SlideShare is downloading. ×
0
INDIAN DENTAL ACADEMY
Leader in continuing dental education
www.indiandentalacademy.com
www.indiandentalacademy.com
METAL CERAMICS
METAL FREE CERAMICS
www.indiandentalacademy.com
www.indiandentalacademy.com
 What is a core?
www.indiandentalacademy.com
 The aluminous core
 Glass infused ceramic core
 Zirconium Dioxide (zirconia) cores
 Y-TZP cores
www.indiandentalacade...
General ClassificationGeneral Classification
1.Conventional powder ceramics
2.Castable ceramics
3.Pressable ceramics
4.Inf...
Conventional powder Ceramics
These products are supplied as
powders to which the technician
adds distilled water to produc...
e.g. OPTEC H.S.P (Jeneric/Pentron)
DUCERAM L.F.C (Ducera Inc)
Vita Hi-Ceram (Vita Zahnfabrik)
 Esthetic.
 High strength....
Castable Ceramics
These products are supplied as
solid ceramic ingots, which are
used for fabrication of cores or
full con...
e.g. DICOR (Corning glass, Dentsply).
CERAPEARL (Bioceram, Kyocera)
 Low abrassiveness
 Time consuming
www.indiandentala...
Pressable Ceramics
These are also supplied as
ingots, these product are
melted at higher
temperatures [11500
c] and
presse...
leucite based
e.g. IPS Empress I (Ivoclar vivadent)
OPC (Optec Pressable Ceramic)
ALCERAM (Cerestore, Innotek dental corp)...
Leucite – KAlSi2O6
Low leucite High leucite
 used for reinforcement of feldspathic dental
porcelains
 Varies from 35%-50...
Mechanical Strength is Insufficient for
construction of All Ceramic Bridges
Crowns
Inlays
Veneers
 Good marginal fit
www....
lithium disilicate
 pre-cerammed
 interlocking nature of the crystals + high density
high flexural strength.
Highly tran...
 Strongest of all the glass ceramics (~350-
450MPa).
 New layering ceramic an apatite glass
ceramic is used
 Crowns for...
Infiltrated Ceramics
These are glass infiltrated
core ceramics. This involves
slip casting technique for
making the core,
...
e.g. In-CERAM
Alumina
Zirconia
Spinell
sintering
packing
www.indiandentalacademy.com
Most Translucent
The strength is about three - four times more greater
than earlier alumina core materials[350 mpa].
Margi...
 Polycrystalline ceramic with out any glass
component
 Three crystallographic forms
 Monoclinic [<1170]
 Tetragonal [>...
www.indiandentalacademy.com
High strength through very small grains
www.indiandentalacademy.com
INCERAM ZIRCONIA
Glass-infiltrated Alumina with 35% partially stabilized Zirconia
core
Good Marginal Fit
High strength of ...
Machinable Ceramics
These products are supplied as ingots in various
shades and are milled into desired form. These
machin...
a ceramic restoration
fabricated by use of a
computer aided design -
computer aided milling
a process of milling a
structu...
CAD-CAM
 DCS–PRESIDENT -1991
 AUTO MILL – 1994
 CEREC 2 – 1994
 CEREC 3 – 2000
 PROCERA
 LAVA
 CERCON
COPY MILLING
...
CAD – CAM Devices:
 DIRECT:
Fully integrated CAD – CAM devices for chair
side restorative approach. CAD & CAM
stations ar...
MATERIALS
 Silicate Ceramics
 Aluminium oxide ceramics with glass
infiltration.
 Aluminium oxide ceramics with dense
si...
Thank you
For more details please visit
www.indiandentalacademy.com
www.indiandentalacademy.com
Upcoming SlideShare
Loading in...5
×

The era of dental ceramics/ dentistry dental implants

434

Published on



Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.

Published in: Education
0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
434
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
4
Comments
0
Likes
1
Embeds 0
No embeds

No notes for slide
  • Ceramics are
    Biocompatibility
            Aesthetics
            Durability
  • Metal ceramic
    1 doesn’t allow light like natural teeth
    Doesn’t reflect light
    Opaque n dense
    Doesn’t show the dentine color
    Ceramics are
    Biocompatibility
            Aesthetics
            Durability
  • a core can be loosely defined as a rigid and durable structure designed to closely fit one or more abutment teeth and used as a framework to support a tooth colored, translucent esthetic veneer. 
  • flexural strength of &amp;quot;plain&amp;quot; feldspathic porcelain is around 50-60 MPa (Mega Pascals), that of an aluminous core is  between 120-130MPa. 
    Aluminous cores are made by adding alumina to the glass system before the frit-sintering stage.  This method of manufacture limits the addition of alumina to no more than 40-50% by volume.  On the other hand, glass infused ceramic cores are built using pure alumina, spinel or zirconia which is sintered PRIOR to the introduction of the glass.   Thus these cores achieve a much higher proportion of refractory crystalline filler than is possible with traditional aluminous core techniques. 
  • Esthetic. High strength.
    But no good fit, only anteriors
  • Generally, one shade of material is available. Which is covered by conventional feldspathic porcelain / is stained to obtain proper shading and characterization of the final restoration.
  • Ceramic blend into resins.
    Good fit
    Only anteriors
    consistently precise crowns by eliminating shrinkage, porosity and the inconsistency of brush build-ups
  • Leucite is a crystalline potassium aluminum silicate (K2O Al203 4SiO2) which is used for reinforcement of feldspathic dental porcelains. At room temperature leucite ordinarily has a tetragonal configuration, and when the leucite exists in this form, it is referred to as&amp;quot;low leucite&amp;quot;.
    When tetragonal leucite is heated to about 625 °C it undergoes a reversible transformation to a cubic polymorph, with a concomitant volume change of 1.2%. The cubic phase of leucite is known as&amp;quot;high leucite.&amp;quot;Upon cooling to room temperature, the cubic leucite crystals revert to the more stable tetragonal polymorph.
  • Apatite Glass Ceramic
    The lithium disilicate ceramics are different from other glass ceramics in that it has an unusually high coefficient of thermal expansion, and ordinary feldspathic glasses cannot be sintered over the lithium disilicate substructure.  Therefore, a new esthetic glass ceramic with a higher thermal expansion had to be invented to overlay the thick framework.  This new layering ceramic is an apatite glass ceramic. The crystals formed on ceramming have the composition Ca10(PO4)6 · 2OH.  This is the same basic constituent in natural tooth enamel. 
  • Slip-cast slurry: A fine particle ceramic dispersed in an aqueous liquid medium is poured into a porous mould which rapidly extracts the liquid causing the formation of a close-packed but weak ceramic particle structure
  • Figure 2. Moisture absorbed into die stone agglomerating or packing alumina particles.
    Figure 3. During sintering the alumina particles fuse together at points of contact producing a highly stable, organized crystalline structure.
    Figure 6. At elevated temperatures, infiltration glass moves inside from external surface to fill air spaces between particles by capillary action.
  • tetragonal configuration
    Principle of strengthening by the incorporation of a crystalline material that is capable of undergoing a change in crystal structure when placed under stresses.
    This crystalline material is usually termed as Partially Stabilized Zirconia(PSZ).
    The energy required for the transformation of PSZ is taken from the energy that allows the crack to propagate.
    One drawback of PSZ is that its refractive index is much higher than that of the surrounding glass matrix.
  • Transcript of "The era of dental ceramics/ dentistry dental implants"

    1. 1. INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com www.indiandentalacademy.com
    2. 2. METAL CERAMICS METAL FREE CERAMICS www.indiandentalacademy.com
    3. 3. www.indiandentalacademy.com
    4. 4.  What is a core? www.indiandentalacademy.com
    5. 5.  The aluminous core  Glass infused ceramic core  Zirconium Dioxide (zirconia) cores  Y-TZP cores www.indiandentalacademy.com
    6. 6. General ClassificationGeneral Classification 1.Conventional powder ceramics 2.Castable ceramics 3.Pressable ceramics 4.Infiltrated ceramics 5.Machinable ceramics www.indiandentalacademy.com
    7. 7. Conventional powder Ceramics These products are supplied as powders to which the technician adds distilled water to produce a slurry, which is build up in layers on a refractory die/ platinum foil to form the contours of the restoration. The powders are available in different shades and translucencies, and are supplied with characterizing stains and glazes. www.indiandentalacademy.com
    8. 8. e.g. OPTEC H.S.P (Jeneric/Pentron) DUCERAM L.F.C (Ducera Inc) Vita Hi-Ceram (Vita Zahnfabrik)  Esthetic.  High strength.  But no good fit,  Only anteriors www.indiandentalacademy.com
    9. 9. Castable Ceramics These products are supplied as solid ceramic ingots, which are used for fabrication of cores or full contour restorations using a lost wax and centrifugal casting technique. Followed by heat-treatment to precipitate a crystalline phase www.indiandentalacademy.com
    10. 10. e.g. DICOR (Corning glass, Dentsply). CERAPEARL (Bioceram, Kyocera)  Low abrassiveness  Time consuming www.indiandentalacademy.com
    11. 11. Pressable Ceramics These are also supplied as ingots, these product are melted at higher temperatures [11500 c] and pressed into a mould using a lost wax technique. These pressed form can be made into full contour, or can be used as a substrate for conventional feldspathic porcelain buildup www.indiandentalacademy.com
    12. 12. leucite based e.g. IPS Empress I (Ivoclar vivadent) OPC (Optec Pressable Ceramic) ALCERAM (Cerestore, Innotek dental corp) Lithium disilicate based IPS Empress 2* Optec OPS 3G www.indiandentalacademy.com
    13. 13. Leucite – KAlSi2O6 Low leucite High leucite  used for reinforcement of feldspathic dental porcelains  Varies from 35%-50% by volume Flexural strength – 120 Mpa tetragonal configuration cubic polymorph->tetragonal configuration www.indiandentalacademy.com
    14. 14. Mechanical Strength is Insufficient for construction of All Ceramic Bridges Crowns Inlays Veneers  Good marginal fit www.indiandentalacademy.com
    15. 15. lithium disilicate  pre-cerammed  interlocking nature of the crystals + high density high flexural strength. Highly translucent because of the high optical compatibility between the crystals The glassy matrix minimizes internal scattering of light. www.indiandentalacademy.com
    16. 16.  Strongest of all the glass ceramics (~350- 450MPa).  New layering ceramic an apatite glass ceramic is used  Crowns for molars.  Anterior three unit bridges. www.indiandentalacademy.com
    17. 17. Infiltrated Ceramics These are glass infiltrated core ceramics. This involves slip casting technique for making the core, The contours of the restoration are obtained by individual layering and staining techniques. Refractory die Packing slurry sintering www.indiandentalacademy.com
    18. 18. e.g. In-CERAM Alumina Zirconia Spinell sintering packing www.indiandentalacademy.com
    19. 19. Most Translucent The strength is about three - four times more greater than earlier alumina core materials[350 mpa]. Marginal fit reported to be very good. INCERAM spinell www.indiandentalacademy.com
    20. 20.  Polycrystalline ceramic with out any glass component  Three crystallographic forms  Monoclinic [<1170]  Tetragonal [>1170]  Cubic [>2370] Zirconia www.indiandentalacademy.com
    21. 21. www.indiandentalacademy.com
    22. 22. High strength through very small grains www.indiandentalacademy.com
    23. 23. INCERAM ZIRCONIA Glass-infiltrated Alumina with 35% partially stabilized Zirconia core Good Marginal Fit High strength of 700 Mpa Fracture toughness- 6-8 Mpa.m1/2 Posterior Crowns and FPDs, Post & Core, Implants Strongest And Toughest Of Available Ceramics www.indiandentalacademy.com
    24. 24. Machinable Ceramics These products are supplied as ingots in various shades and are milled into desired form. These machined restorations can be stained and glazed to obtain desired characterization. www.indiandentalacademy.com
    25. 25. a ceramic restoration fabricated by use of a computer aided design - computer aided milling a process of milling a structure using a device that traces the surface of a metal, ceramic or a polymer pattern and transfers the traced spatial positions to a cutting station. C A D -C A M C e r a m ic s C o p y -M il l e d C e r a m ic s M ac h in a ble C er am ic s www.indiandentalacademy.com
    26. 26. CAD-CAM  DCS–PRESIDENT -1991  AUTO MILL – 1994  CEREC 2 – 1994  CEREC 3 – 2000  PROCERA  LAVA  CERCON COPY MILLING  CELAY – 1991  PRO CAM - 1996 www.indiandentalacademy.com
    27. 27. CAD – CAM Devices:  DIRECT: Fully integrated CAD – CAM devices for chair side restorative approach. CAD & CAM stations are located at the dental office.  INDIRECT: System that consists of several modules with at least, distinctive CAD & CAM stations. www.indiandentalacademy.com
    28. 28. MATERIALS  Silicate Ceramics  Aluminium oxide ceramics with glass infiltration.  Aluminium oxide ceramics with dense sintering.  Titanium.  Precious alloys  Non precious alloys www.indiandentalacademy.com
    29. 29. Thank you For more details please visit www.indiandentalacademy.com www.indiandentalacademy.com
    1. A particular slide catching your eye?

      Clipping is a handy way to collect important slides you want to go back to later.

    ×