Guidelines for Post and Core restoration

By Dr.Swathi Pai on Thursday 1 May 2008 with 0 comments



  • Posts should be at least as long as the crown, longer if possible, and still leave 3-5 mm of gutta percha for an apical seal .

  • Increased post length increases retention.

  • They should be the smallest diameter that will adapt to the minimally prepared canal.

  • Tapered posts increase the risk of fracture of the tooth.

  • There should be at least a 1mm ferrule affect no matter what type of post and core is utilized.

  • Antirotational devices should be incorporated into the core if the post is cylindrical.

  • Core material should have good compressive and tensile strength and be dimensionally stable.

  • Glass ionomer cores have the advantage of direct placement, fluoride release, dimensional stability and bonding to dentin but have a low tensile strength.

  • Composite core advantages are direct placement and lack of corrosion, but has the inherent disadvantage of low tensile strength and dimensional instability due to water sorption.

  • Amalgam and cast alloys have the advantage of better strength and dimensional stability than other core materials and are usually the appropriate materials.

  • The tooth with less than four complete coronal dentin walls may require a cemented post and additional internal retentive features for adequate retention of the final restoration.

  • Clinical assessment of remaining tooth structure will determine the combination of retentive features used by the clinician.


Category: Conservative and Endodontics Notes

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