Effect of different filling materials in combination with intraradicular posts on the resistance to fracture of weakened roots.

Abstract:

:The preservation and restoration of severely weakened pulpless teeth is a difficult and relatively unpredictable procedure. This study evaluated the resistance to fracture of experimentally weakened bovine roots internally reconstructed with different filling materials in combination with prefabricated post compared with restored roots that were relatively intact. The roots of 75 mandibular bovine incisors with similar bulks were selected. Of these, 60 were internally prepared to standardized dimensions, thereby simulating weakness. All roots were filled with different restorative materials. The specimens were submitted to the fracture resistance testing with the application of a tangential compressive loading at an angle of 135 degrees in relation to the long axes of the roots. Results indicated statistically significant differences in relation to the root conditions. Weakened roots were less resistant to fracture than were controls. The roots restored with the resin cement demonstrated the lowest fracture resistance values, but statistically significant differences were observed only when compared with those restored by the resin-modified glass-ionomer cement. Resin-modified glass-ionomer cement, polyacid-modified resin composite and resin composite behaved similarly without statistically significant differences among them. None of the materials evaluated were capable of achieving the fracture resistance recorded for unweakened controls.

journal_name

J Oral Rehabil

authors

Marchi GM,Paulillo LA,Pimenta LA,De Lima FA

doi

10.1046/j.1365-2842.2003.00990.x

keywords:

subject

Has Abstract

pub_date

2003-06-01 00:00:00

pages

623-9

issue

6

eissn

0305-182X

issn

1365-2842

pii

990

journal_volume

30

pub_type

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