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Effect of dentinal bonded resin post-core preparations on resistance to vertical root fracture
R T Bex1, M W Parker, J T Judkins
1Naval Dental School, National Naval Dental Center, Bethesda, Md.
Abstract:
An in vitro study was conducted to compare the resistance to failure of two restorative protocols for endodontically treated teeth. Half of 24 specimens received cemented cast post-core restorations and the other half were restored with dentin-bonded composite resin using the ferric oxalate, NTG-GMA, and the PMDM system developed by Bowen. The dentin-bonded resin post-core restorations provided significantly less resistance to failure than the cemented custom cast post-core. The dentin-bonded resin post-core fractured in every instance before the root fractured. A greater force was required to cause failure of the resin post as the cross-sectional area of the post increased.
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