To evaluate the fracture resistance of proclined endodontically treated teeth with different post and core systems: study.

AIM

This study was aimed to evaluate the fracture resistance of proclined endodontically treated teeth with different post and core systems.

SETTINGS AND DESIGN

Experimental study.

METHODOLOGY

Eighty extracted maxillary central incisors were selected and decoronated keeping 2 mm of crown ferrule and were endodontically treated. Postspace was prepared retaining 5 mm apical gp using peeso 3. Samples were divided into two groups. In Group 1, Wax pattern fabricated to accommodate different core angulations to be casted with Ni-Cr alloy. In Group 2, ever stick posts were angulated and cemented followed by porcelain fused to metal crown cementation for both the groups. Samples were thermocycled and subjected to the universal testing machine.

STATISTICAL ANALYSIS USED

One-way ANOVA and Tukey's test were used to compare the mean fracture resistance between different angulations in cast post and ever stick posts. Student's paired -test was used to compare the mean fracture resistance between cast post and everstick posts for each angulations. value was set at < 0.05.

RESULTS

The fracture resistance was the highest at 20° and lowest at 30° core angulations in both the groups.

CONCLUSIONS

Changing core angulation up to 20° can be carried out safely using any of the post systems tested in the study. Core angulations >20°, should be used with caution, especially in patients with abnormal parafunctional habits and occlusal trauma.