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DENTAL POST
1. Institute of
Biomedical
PROGRAM DENTAL SURGEON.
Sciences.
DENTAL POST
Student: Ángel Salinas Ramírez
Dr. Alfredo Nevares Rascón
2. DENTAL POST.
What are dental posts?
The posts also called dental bolts are
used to make larger the tooth
and can support thecrown.
function dental posts.
Return the anatomy and function to a
tooth that was destroyed or figure 1:post
weakened protect whatremains of the http://www.odontologosecuador.com/espanol/articulo
tooth for s_odont/4.html
possible fractures, retention and
distribution of occlusal forces.
15/01/12
3. MATERIALS
Depending on the material the poles can
basically be divided into two groups: metallic
and no metallic.
Figure 2: metal posts
http://www.sanden.info/catal
ogo/index.php?cPath=93_73
DENTAL METAL POSTS
Within the metal, in turn, have
the precast and cast.
Figure: 3 prefabricated •The prefabricated are stainless steel or
posts of titanium and titanium are faster, easier, cheaper and less
stainless steel (right) abusive to the tooth.
http://www.exim- •The castings can be made with
pharma.com/other.html gold type III or IV. Have high tensile
Figure 4: metal posts
strength, compression and deformation (high
http://www.juanbalboa.com/blog/p
modulus of elasticity) (not screwed) erno-munon-colado/
15/01/12
4. NO METALLIC DENTAL POSTS
No metallic dental Posts: we have
the zirconium, resin reinforced with glass
fiber reinforced resin and carbon fiber.
•The zircon have extremely high modulus of
elasticity, the metal even higher.
•The fiberglass and carbon, have a modulus of Figure 5: Non-metallic post
http://colegiodentistas.org/revista/i
elasticity similar to dentin, and thus are least ndex.php/revistaodontologica/articl
likely to cause root fractures. Their advantage e/view/85/171
is they are cheaper, faster, easier, and
requires less wear layer.
Figure 7: Table of porcentages
Figure 6: Non-metallic poles fiberglass of metal components.
http://www.exim-pharma.com/other.html http://www.gacetadental.com/noticia/563
1/MERCADO-DENTAL/uso-postes-fibra-
15/01/12 reconstrucciones.html
5. COMPONENTS OF A DENTAL POST
Fiberglass
Unidirectional
Resin (BIS-
GMA,UDMA)
Filing
(barium, sulfate, bo
rosilicate
Fgura 8: components of a dental post
20/01/12
6. CHARACTERISTICS OF A DENTAL POST
The size of a pole; should not exceed
one third of the root diameter.
Conversely, increasing the removal of the
dental structure to accommodate a wide
pole, can lead to perforation or predispose
root fracture.
Figure: 9 size of a dental post.
http://www.dentistaschile.cl/category/
implantes-dentales-en-chile/
The length of the post; must be equal
to or greater than the length of the crown. Is
recommended between half and 3/4 parts of
the root. Since in the long poles thin roots can
cause perforations or fractures, while the
short roots may violate the apical seal.
Figure 10: length of a pole.
http://www.bogotadentistry.com/art
20/01/12 /imp1.gif
7. DIFERENTS FORMS OF POSTS.
•Smooth
•Striated
•Parallel
•Conical
•Hybrid Figure 11: Schematic layout of
•Assets bolts (A) conical. (B) parallel. (C) conical threading. (D) parallel
threaded.
•Liabilities
•Rigid http://www.carlosboveda.com/Odontologosfolder/
•flexible odontoinvitadoold/odontoinvitado_40.htm
25/01/12
8. CEMENT TO POST
Non-adhesive cements zinc phosphate
cement interdigitation Classic Withholding Ade
quatebut not excessive, not chemical Fig: 12 zinc phosphate cement .
bonding does not inhibit marginal
http://productos.euroaura.org/im
leakage, No anticariogenic properties. ages/0840.jpg
Adhesive cements glass ionomer
cement reinforced
with moderate retention High
strengthresin Solubility little or no fluoride
release
Fig: 13 inomero glass cement .
http://www.insumosdentales.cl/images/REF_1083_
_20090416.jpg
25/01/12
9. ADVANTAGES DISAVANTAGES
Glass post: reducing the risk Some posts such as metal, are
of root fractures. very rigid and stress transfer.
The carbon fiber post allows the Some posts and castings are a bit
post and the stump in a single more expensive because of its
session. chemical components.
The prefabricated posts are The metal poles are
faster, easier, cheaper and less transparent showing an
abusive to the tooth. opacity in central
tooth and gum.
Elaborated 26/02/12
10. TRADEMARKS
Optident. Figure 14: poles kit.
Tenax.
D.T. ligth post.
Cytec (Alemania)
Parapost Fiber White (Suiza http://colegiodentistas.org/revista/inde
x.php/revistaodontologica/article/view/
Angelus Reforpost (Brasil) 85/171
Figure 15: Case of poles.
26/01/12 Figure 16: poles of two thicknesses.
