Effect of Base and Inlay Restorative Material on the Stress Distribution and Fracture Resistance of Weakened Premolars

Operative Dentistry
A C O SouzaA L S Borges

Abstract

The purpose of this study was to evaluate the influence of direct base and indirect inlay materials on stress distribution and fracture resistance of endodontically treated premolars with weakened cusps. Forty healthy human premolars were selected; five were left intact as controls (group C+), and the others were subjected to endodontic treatment and removal of buccal and lingual cusp dentin. Five teeth were left as negative controls (group C-). The remaining 30 teeth were divided into two groups according to the direct base material (glass ionomer [GIC] or composite resin [CR]). After base placement, each group was subjected to extensive inlay preparation, and then three subgroups were created (n=5): no inlay restoration (GIC and CR), restored with an indirect composite resin inlay (GIC+IR and CR+IR), and restored with a ceramic inlay (GIC+C and CR+C). Each specimen was loaded until fracture in a universal testing machine. For finite element analysis, the results showed that the removal of tooth structure significantly affected fracture resistance. The lowest values were presented by the negative control group, followed by the restored and based groups (not statistically different from each other) and all lower than the positi...Continue Reading

References

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Citations

Mar 19, 2016·Australian Endodontic Journal : the Journal of the Australian Society of Endodontology Inc·Mohammad D Al AmriHatem Al Qarni
Apr 4, 2017·Journal of Oral Rehabilitation·H ZhangM-Q Wang
Jan 18, 2018·Implant Dentistry·João Paulo Mendes TribstRenato Sussumu Nishioka
Nov 30, 2018·Restorative Dentistry & Endodontics·Victória Luswarghi Souza CostaAlexandre Luiz Souto Borges
Dec 6, 2018·Brazilian Oral Research·João Paulo Mendes TribstMarco Antonio Bottino
Jan 24, 2021·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·Ankit NayakNiharika Jain

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