Abstract
Introduction
The aim of the present study was to compare the survival rates against fracture of
premolar endodontically treated teeth (ETT) restored with resin composite or crowns
and to identify risk factors associated with the fracture.
Methods
Data from dental records and radiographs of premolar ETT with postendodontic restorations
(ie, resin composite or crowns) were collected between 2012 and 2016 and selected
following selected inclusion and exclusion criteria. Tooth location, type of restoration,
number of proximal contacts, and amount of tooth surface loss were recorded. The incidence
and restorability of postendodontic fractures were identified. Survival rates against
fracture of the 2 restoration types were calculated using Kaplan-Meier survival analysis.
Any potential factors associated with fractures were identified using Cox proportional
hazards models.
Results
The survival rate against fracture of ETT restored with crowns (95.1%) was higher
than resin composite (77.0%). ETT restored with resin composite with 1 or 2 tooth
surface losses and 2 proximal contacts had a high survival rate of 88.5% that was
not significantly different from ETT with crowns. A higher incidence of restorability
after fracture was observed in teeth restored with resin composite than crowns. The
type of restoration and number of proximal contacts were identified as potential risk
factors associated with fracture incidence.
Conclusions
The survival rate against fracture of ETT restored with crowns was higher than resin
composite. However, ETT with 1 or 2 tooth surface losses and 2 proximal contacts and
restored with resin composite showed a high survival rate that was comparable with
ETT restored with crowns.
Key Words
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Article info
Publication history
Published online: December 02, 2017
Identification
Copyright
© 2017 American Association of Endodontists.
