Fracture resistance of endodontically treated molars restored with horizontal fiberglass posts or indirect techniques
Autor: | Luiz Henrique Burnett, Carolina Ritter Bromberg, Caroline Beatriz Alves, Sinval Adalberto Rodrigues-Junior, Rafael Melara, Ana Maria Spohr, Deborah Stona |
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Rok vydání: | 2016 |
Předmět: |
Molar
Dental Stress Analysis fiber post 0206 medical engineering Dentistry Dental Cements 02 engineering and technology In Vitro Techniques Composite Resins endodontic treatment 03 medical and health sciences Tooth Fractures 0302 clinical medicine stomatognathic system Medicine Humans Dental Restoration Failure Dental Restoration Permanent General Dentistry Practical implications Tooth Nonvital Universal testing machine High prevalence Inlay business.industry 030206 dentistry fracture resistance 020601 biomedical engineering Posterior teeth Fracture (geology) Glass business Post and Core Technique |
Zdroj: | Repositório Institucional PUCRS Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS) instacron:PUC_RS |
ISSN: | 1943-4723 |
Popis: | Background Because of the many possibilities for endodontically restoring the posterior teeth and the high prevalence of restoration failures, this topic continues to be of major concern. A composite resin (CR) restoration reinforced by a horizontal fiberglass post may improve the fracture resistance of endodontically treated teeth. The authors investigated this possibility by comparing the fracture resistance of molars restored with direct techniques with that of molars restored with indirect techniques. Methods The authors divided 50 extracted sound third molars into 5 groups: sound teeth, onlay (ON), inlay (IN), direct CR, and transfixed fiberglass post (TFP) plus direct CR. The authors performed standardized mesio-occlusodistal cavity preparations and endodontic treatments. The authors cemented indirect restorations of Lava Ultimate (3M ESPE) adhesively in the ON and IN groups. The authors restored CR group teeth directly with Filtek Z230 XT (3M ESPE). In the TFP group, the authors transfixed 2 fiberglass posts horizontally and restored the teeth directly with CR. Thereafter, the authors submitted the teeth to cyclic fatigue loading with 500,000 cycles at 200 newtons. The authors tested fracture resistance in newtons in a universal testing machine. The authors analyzed data with 1-way analysis of variance and a Tukey test ( P Results Sound teeth had the highest fracture resistance. ON had the highest recovery of resistance, followed by TFP. CR had the lowest recovery, which was similar to that of IN. Conclusions Endodontically treated molars restored with TFP plus CR had fracture resistance similar to those restored with ON, which was higher than that for IN or CR only. Practical Implications Horizontal TFPs placed inside a composite restoration had the same performance as did ON restorations. |
Databáze: | OpenAIRE |
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