Adhesive post-endodontic restorations with fiber posts: push-out tests and SEM observations.
OBJECTIVE
Nowadays, the restoration of endodontically treated teeth is based on the use of materials with a modulus of elasticity similar to that of dentin (18.6 GPa). Fiber posts, resin cements and some composite resins all have this characteristic. This study evaluated the bond strength between luting materials, root dentin and fiber posts through push-out tests and examined the integration among these three components through scanning electron microscopy.


METHODS
Endodontically treated extracted teeth and plastic plates were used to test the interface between luting agent and dentin and luting agent and post.


RESULTS
Chemical affinity between different components (luting materials and fiber posts) is extremely important in achieving high bond strength. The bond strength tests and SEM observations showed that in vitro, composite resins perform better than resin cements.


CONCLUSIONS
The in vivo use of these materials may significantly reinforce residual tooth structure therefore reducing the risk for fracture and debonding.
Boschian Pest
Luca
L
Department of Restorative Dentistry, University of Milan, Milan, Italy. luca.boschian@galactica.it
Cavalli
Giovanni
G
Bertani
Pio
P
Gagliani
Massimo
M
D000704:Analysis of Variance; D003188:Composite Resins; D001840:Dental Bonding; D003799:Dental Stress Analysis; D017220:Dentin-Bonding Agents; D004548:Elasticity; D006801:Humans; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D011176:Post and Core Technique; D019279:Resin Cements; D018709:Statistics, Nonparametric
D003188:Composite Resins; D017220:Dentin-Bonding Agents; D019279:Resin Cements