COMPARISON OF THE FRACTURE RESISTANCE OF REATTACHED TOOTH FRAGMENT VERSUS COMPOSITE CORE BUILD-UP USING THREE DIFFERENT POST SYSTEMS IN ENDODONTICALLY TREATED ANTERIORS – AN IN VITRO STUDY.

Abstract

Objective: To compare the fracture resistance of endodontically treated teeth restored with Parapost, Everstick and Ribbond post systems.

Materials and Methods: Root canal therapy was performed in 40 maxillary anteriors. The coronal portion of the teeth were sectioned at the junction of coronal and middle third of the crown and they were divided into four groups [n=10] .Group I served as a positive control. In group II, III and IV Parapost, Everstick and Ribbond were used respectively to restore the tooth. In group II the sectioned coronal fragment was reattached and in group III and IV core build up was done using composite. Specimens were loaded until failure in a universal testing machine and the resistance to fracture was calculated.

Statistical Analysis: Datas were analysed using One Way ANOVA and Dunnett test.

Results: Mean fracture resistance was as follows: Control – 393.0 N, Parapost – 238.0 N, Ribbond – 134.0 N, Everstick - 222N. The fracture strength of Parapost with reattached fracture fragment showed statistically significant fracture strength values when compared with Ribbond and Everstick where composite was used as a core build up material

Keywords: Fracture resistance, Reattachment, Everstick, Ribbond, Parapost