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  1. 1. Institute ofBiomedical PROGRAM DENTAL SURGEON.Sciences. DENTAL POST Student: Ángel Salinas Ramírez Dr. Alfredo Nevares Rascón
  2. 2. DENTAL POST.What are dental posts?The posts also called dental bolts areused to make larger the toothand can support thecrown. function dental posts.Return the anatomy and function to atooth that was destroyed or figure 1:postweakened protect whatremains of the for s_odont/4.htmlpossible fractures, retention anddistribution of occlusal forces.15/01/12
  3. 3. MATERIALSDepending on the material the poles canbasically be divided into two groups: metallicand no metallic. Figure 2: metal posts 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 orposts of titanium and titanium are faster, easier, cheaper and lessstainless steel (right) abusive to the tooth.http://www.exim- •The castings can be made gold type III or IV. Have high tensile Figure 4: metal posts strength, compression and deformation (high modulus of elasticity) (not screwed) erno-munon-colado/15/01/12
  4. 4. NO METALLIC DENTAL POSTSNo metallic dental Posts: we havethe zirconium, resin reinforced with glassfiber reinforced resin and carbon fiber.•The zircon have extremely high modulus ofelasticity, the metal even higher.•The fiberglass and carbon, have a modulus of Figure 5: Non-metallic post similar to dentin, and thus are least ndex.php/revistaodontologica/articllikely to cause root fractures. Their advantage e/view/85/171is they are cheaper, faster, easier, andrequires less wear layer. Figure 7: Table of porcentagesFigure 6: Non-metallic poles fiberglass of metal components. 1/MERCADO-DENTAL/uso-postes-fibra- 15/01/12 reconstrucciones.html
  5. 5. COMPONENTS OF A DENTAL POST Fiberglass Unidirectional Resin (BIS- GMA,UDMA) Filing (barium, sulfate, bo rosilicate Fgura 8: components of a dental post20/01/12
  6. 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. length of the post; must be equalto or greater than the length of the crown. Isrecommended between half and 3/4 parts ofthe root. Since in the long poles thin roots cancause perforations or fractures, while theshort roots may violate the apical seal. Figure 10: length of a pole. /imp1.gif
  7. 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•flexible odontoinvitadoold/odontoinvitado_40.htm25/01/12
  8. 8. CEMENT TO POSTNon-adhesive cements zinc phosphatecement interdigitation Classic Withholding Adequatebut not excessive, not chemical Fig: 12 zinc phosphate cement .bonding does not inhibit marginal, No anticariogenic properties. ages/0840.jpgAdhesive cements glass ionomercement reinforcedwith moderate retention Highstrengthresin Solubility little or no fluoriderelease Fig: 13 inomero glass cement . _20090416.jpg 25/01/12
  9. 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. 10. TRADEMARKSOptident. Figure 14: poles kit.Tenax.D.T. ligth post.Cytec (Alemania) Parapost Fiber White (Suiza x.php/revistaodontologica/article/view/Angelus Reforpost (Brasil) 85/171 Figure 15: Case of poles.26/01/12 Figure 16: poles of two thicknesses.
  11. 11. BIBLIOGRAPHY•••••••