Glass ceramics dental materials

1. Institute of
Biomedical Sciences
Glassceramics as
dental materials
Dra. Laura Berenice Hernandez Sosa
Dr.: Alfredo Nevárez Rascón
Fig.#1

2. History
In the 60's, there was a qualitative leap in ceramic dental
restorations from Pat Weinstein et al (1962) proposing the
system leucite-feldspar glass for restorations. Despite
progress, improvements can be throw in the following
areas: mechanical properties of restorations: Because
composite restorations are to have different phases where
the coefficients of thermal expansion and even the
crystalline phase martensitic transformations can occur at
low temperatures, cracks appear between crystals and
matrix or within the crystals.

3. Classification of metal-free
ceramic
according to their composition can be classified into:
o Silicate-based ceramic
o Ceramic oxides
o Ceramic oxides not
o Vitroceramics

4. ARE THEY?
crystallized materials are created by nucleation and growth of crystals in
the glass matrix.
ceramics treated with a special procedure that gives high hardness and
makes it very resistant to heat and sudden temperature changes
Basic components
 Sílice
 Aluminum

5. The glass ceramic is a material that is molded to the
desired shape as a crystal, then subjected to a heat
treatment to induce a devitrification.
Fig.#2
http://www.sonrisasradiantes.com/tag/hi-ceram/

6. When the object has solidified, the mold refractory
(lining) is broken into pieces and removed the piece
of pottery.
Then the asperities are filed, are made ​up and glasean or is
coated with one or more layers of a thermally compatible
porcelain.
http://solutions.productos3m.es/wps/portal/3M/es_ES/3M_ESPE/DentalManufacturers/Product Fig.#3
s/DigitalDentistry/DentalTechnician/LavaMaterials/DentalCeramics/

7. The ceramic material can be obtained by different processing
methods, can be melted, drain, infiltrate and turning according
to the method or way of working it further classification of the
material arise most recent or current
Fig.#4
http://www.straumann-cares-digital-solutions.com/es/com-
index/digitalsolutions/cadcam/prosthetics/materials-ips-emax.htm

8. There are 3 types
Ceramic casting
Injected or pressed ceramic
Glass infiltrated ceramic
Torneables ceramic or fresables

9. Ceramic casting
An example of such porcelain crystal is a product based on
the growth of crystals in the glass matrix
crystalline porcelain is a product based on the crystal growth
in the matrix flourmicatetrasilica virdio
Fig.#5
http://www.verboweb.com.ar/caracteristicas.htm

10. Injected or pressed ceramic
are the highest content of leucine and its presentation is
usually in glass ingots soften with heat and mass are injected
into a mold prior apartir of a pattern. is then colored or
otherwise coated with porcelain synthesized.
Firg.#6 http://www.verboweb.com.ar/caracteristicas.htm

11. Glass infiltrated ceramic
are higher alumina content (85%) for both high flexural strength
of over 8500-630 MPa) as may be indicated not only for crowns
bridges but also to previous small.
Fig.#7
http://www.verboweb.com.ar/caracteristicas.htm

12. Torneables ceramic or fresables
These systems were initially used for the manufacture of crown and bridge
structures below: composite with titanium coated with low fusion
porcelain. At present, porcelain, feldspathic or hotpl are cut or machined
without chipping or fracture on blocks suitable for the size of the
restoration.
They are presented as machinable blocks designed for processing in
computer-aided systems. CAD / CAM
fit your clothing are 3 groups: condensation on refractory dye, situation
lost wax wing, and computer-assisted technology.
Fig.#8
http://scielo.isciii.es/scielo.php?script=sci_arttext&pid=S1138-123X2003000500005

13. Modeling in Compression
This method uses a piston to cause the ceramic hot, passing
through a hot tube and from there to a mold where the
resulting ceramic is cooled and adopts the shape of the mold.
Fig.#9 http://www.verboweb.com.ar/caracteristicas.htm

14. Trademarks
IPS Empress
Dicor
Cerfestore
Hi-Ceram
In-Ceram
Optec hsp
Fig.#9
http://www.google.com.mx/imgres?q=ips+empress&num=10&hl=es&gbv=2&biw=1024&bih=612&tbm=isch&tbnid=Un
wHEI9h3QwGAM:&imgrefurl=

15. IPS EMPRESS
S EMPRESS
Ceramic administered as enucleated ingots are
heated and compressed until it flows into a mold
Fg.#10
http://www.google.com.mx/imgres?q=ips+empress&num=10&hl=es&gbv=2&biw=1024&
bih=612&tbm=isch&tbnid=UnwHEI9h3QwGAM:&imgrefurl=

16. Advantage Disadvantages
Lack of metal Fractures in posterior areas
Resistance to bending
Excellent fit and aesthetics

17. DICOR
Porcelain is a casting which can be shaped to form an inlay, a veneer or a
crown total coating a casting process using the lost wax method similar to
that used for metals.
Fig.#11
http://scielo.isciii.es/pdf/rcoe/v8n5/525%20Caracteristicas.pdf

18. Advantage Disadvantages
Ease of manufacture Limited use in air where there was
little tension
aesthetics They could be massaged internally
Good marginal fit
Flexural moderately high
Low abrasion on tooth enamel

19. Biography
http://scielo.isciii.es/scielo.php?script=sci_arttext&pid=S1138-
123X2003000500005
http://www.slideshare.net/criztiam/ceramicas-dentales-5562646
http://abg2010g641.blogspot.com/
http://es.scribd.com/doc/20025352/Sistemas-Ceramicos-en-Protesis-
Fija-Unitaria
http://www.google.com.mx/search?tbm=isch&hl=es&source=hp&biw=102
4&bih=612&q=Optec+hsp&gbv=2&oq=Optec+hsp&aq=f&aqi=&aql=&
http://www.verboweb.com.ar/caracteristicas.htm
http://www.google.com.mx/imgres?q=ips+empress&num=10&hl=es&gbv=2&
biw=1024&bih=612&tbm=isch&tbnid=UnwHEI9h3QwGAM:&imgrefurl= Fg. #12