1. Institute of Biomedical Sciences.
DENTAL POST
Dr. Ángel Salinas Ramírez
Dr. Alfredo Nevárez Rascón
2. DENTAL POST.
Dental posts
The posts also called dental bolts are
used to make larger the tooth
and can support thecrown.
Function of the dental posts.
Return the anatomy and function
to a tooth that was destroyed or
weakened protect whatremains of
the tooth for possible fractures,
retention and distribution
of occlusal forces. figure 1:post
http://www.odontologosecuador.com/espanol/artic
ulos_odont/4.html
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/cat
alogo/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
stainless steel (right) and less 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
http://www.juanbalboa.com/blog
(high modulus of elasticity) /perno-munon-colado/
(not screwed)
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
elasticity similar to dentin, and thus are least
http://colegiodentistas.org/revista
likely to cause root fractures. Their advantage /index.php/revistaodontologica/ar
is they are cheaper, faster, easier, and ticle/view/85/171
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 NON-METALLIC
DENTAL POST
Fiberglass
Unidirectional
Resin (BIS-
GMA,UDMA)
Filing (barium,
sulfate,
borosilicate
Figure 8: components of non-metallic 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.
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
Figure 10: length of a pole.
roots may violate the apical seal.
http://www.bogotadentistry.com
20/01/12 /art/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/Odontologosfolde
•flexible r/odontoinvitadoold/odontoinvitado_40.htm
25/01/12
8. CEMENT TO POST
Non-
adhesive cements zinc phosphate
cement interdigitation Classic Withholdi Figure: 12 zinc phosphate cement
ng Adequatebut not http://productos.euroaura.org/i
excessive, not chemical bonding does not mages/0840.jpg
inhibit marginal leakage,
No anticariogenic properties.
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_108
3__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 Some posts and castings are a
post allows the post and the bit more expensive because
stump in a single session. of its chemical components.
The prefabricated posts are The metal poles are
faster, easier, cheaper transparent showing an
and less 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 http://colegiodentistas.org/revista/in
dex.php/revistaodontologica/article/v
(Suiza iew/85/171
Angelus Reforpost (Brasil)
Figure 15: Case of poles.
26/01/12 Figure 16: poles of two thicknesse
