IADR Abstract Archives
POST-RETENTIVE CORONAL PART CONTRIBUTION TO A DOUBLE FERRULE EFFECT
Objectives: The shape of the coronal part of the post influences the durability of the restoration of root treated teeth. Most of the posts used in the in-vitro or clinical studies have no retention elements in the coronal part.
The purpouse of this report was to evaluate the influence of the retentive coronal elements on the in vitro and in vivo behavior of root treated teeth restored with zirconia posts with retentive rings.
Methods: Different patients and experimental specimens are presented with maxillary central and lateral incisors. The treatment included restoration of root treated teeth with zirconia ceramic posts (cylindrical-conical Y-TZP – (IJS-MF), Ljubljana, Slovenia) with retentive rings in the coronal part, core build ups (IPS E-max press and MultiCore composite) and all ceramic crowns (IPS E-max press).
Results: The results indicate that the zirconia posts with retentive rings present sufficient aesthetics and fracture resistance when the remaining dentin of root treated teeth is adequately prepared for internal and external ferrule.
Conclusions: Case selection and treatment choices for post core restorations should be based on a detailed assessment of tooth structure, and the advantages and limitations of dental materials. Current research examining the new design of post and core systems may contribute to a contemporary view on the already in use posts and opens up possibilities to creating a genuine connection between the new ceramic post and core systems with retentive coronal part and the newly designed tooth structure (inner and outer ferrule).
The purpouse of this report was to evaluate the influence of the retentive coronal elements on the in vitro and in vivo behavior of root treated teeth restored with zirconia posts with retentive rings.
Methods: Different patients and experimental specimens are presented with maxillary central and lateral incisors. The treatment included restoration of root treated teeth with zirconia ceramic posts (cylindrical-conical Y-TZP – (IJS-MF), Ljubljana, Slovenia) with retentive rings in the coronal part, core build ups (IPS E-max press and MultiCore composite) and all ceramic crowns (IPS E-max press).
Results: The results indicate that the zirconia posts with retentive rings present sufficient aesthetics and fracture resistance when the remaining dentin of root treated teeth is adequately prepared for internal and external ferrule.
Conclusions: Case selection and treatment choices for post core restorations should be based on a detailed assessment of tooth structure, and the advantages and limitations of dental materials. Current research examining the new design of post and core systems may contribute to a contemporary view on the already in use posts and opens up possibilities to creating a genuine connection between the new ceramic post and core systems with retentive coronal part and the newly designed tooth structure (inner and outer ferrule).