Indications, clinical and laboratory stages of manufacture of pin teeth. - PowerPoint PPT Presentation

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Indications, clinical and laboratory stages of manufacture of pin teeth.
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Indications, clinical and laboratory stages of manufacture of pin teeth.

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  1. Indications, clinical and laboratory stages of manufacture of pin teeth.

  2. ? ? ?

  3. How ? Why ?

  4. NON - ODONTOGENIC CYST Misdiagnosis resulted in unnecessary endodontic treatment of four anterior teeth. 4/1972

  5. The Result The Concern

  6. Considerations for Anterior Teeth A metal post is not recommended in anterior teeth which do not require complete coverage restorations. This decision primarily focuses on: [1] the integrity of the remaining tooth structure. [2] the amount of functional load which to anterior teeth are subjected. [3] the morphologic development of anterior teeth.

  7. Variation in bite force by location

  8. The incisal edge of lower anterior teeth function across the lobes of opposing upper incisors

  9. Comparative resistance to fracture to shear loading

  10. Comparison of fracture stress with varying post types

  11. Comparative fracture loads with and without posts

  12. Comparative fracture loads with and without posts

  13. Considerations for posterior teeth Virtually all posterior teeth which have received endodontic therapy are in turn recommended for a cast restoration coronally. In turn if a coronal buildup is deemed necessary {core} for retention of the cast restoration, then further the decision for the need of a post must be determined. The prevailing considerations for posterior teeth: [1] greater functional loading of posterior teeth. [2] morphologic disposition of posterior teeth to splitting.

  14. Fusion of buccal and lingual lobes Fusion of buccal and lingual lobes

  15. Hazards of treatment at a S.D.M.

  16. Intra-radicular build up without post for molar teeth

  17. Design Considerations for Posts

  18. Post - endodontic internal build up Direct restorative with or without prefabricated post in canal Custom cast post with core fabricated either directly or indirectly or

  19. Design considerations for posts Diameter • retain as much dentin as possible in the roots of all teeth; increasing the diameter of the post has a minimally significant effect on the increase in retention.

  20. Effect of Dowel Design and Diameter On Retention Zinc Phosphate 8 mm length Force in Kg