New material perspective for endocrown restorations: effects on mechanical performance and fracture behavior
Abstract The aim of this study was to investigate the mechanical performance and the fracture behavior of endocrown restorations prepared using distinct restorative materials. A total of 42 sound molars with similar crown size and shape were cut at 2 mm above the cementoenamel junction and endodonti...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Pesquisa Odontológica
2019-02-01
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| Series: | Brazilian Oral Research |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242019000100206&lng=en&tlng=en |
| _version_ | 1818753804848332800 |
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| author | José Augusto SEDREZ-PORTO Eliseu Aldrighi MÜNCHOW Lisia Lorea VALENTE Maximiliano Sergio CENCI Tatiana PEREIRA-CENCI |
| author_facet | José Augusto SEDREZ-PORTO Eliseu Aldrighi MÜNCHOW Lisia Lorea VALENTE Maximiliano Sergio CENCI Tatiana PEREIRA-CENCI |
| author_sort | José Augusto SEDREZ-PORTO |
| collection | DOAJ |
| description | Abstract The aim of this study was to investigate the mechanical performance and the fracture behavior of endocrown restorations prepared using distinct restorative materials. A total of 42 sound molars with similar crown size and shape were cut at 2 mm above the cementoenamel junction and endodontically treated. They were categorized according to the restorative material used to fabricate endocrown restorations (n=7), namely, conventional composite (Filtek™ Z350 XT), bulk fill composite (Filtek™ Bulk Fill), conventional composite modeled using resin adhesives (SBMP: Scotchbond™ Multipurpose Adhesive; or SBU: Scotchbond™ Universal Adhesive), and IPS e.max lithium disilicate (Ivoclar Vivadent; positive control). Unprepared sound teeth were used as negative control. All endocrowns were bonded using a self-adhesive cement (Rely-X™ U200). The teeth were submitted to fatigue (Byocycle) and fracture (EMIC DL500) testing. Load-to-fracture (in N) and work-of-fracture (Wf, in J/m2) values were analyzed by ANOVA (p < 0.05). The endocrowns did not fracture or de-bond upon fatigue, showing similar load-to-fracture and work-of-fracture values, regardless of the restorative material (p > 0.05). The endocrowns fabricated by combining Z350 and SBMP had the least harsh fractures, in contrast to endocrowns prepared using Z350 only, which exhibited an equilibrium between repairable and irrepairable fractures. The e.max endocrowns exhibited more aggressive failures (root fracture) than other groups, resulting in higher rates of irrepairable fractures. In conclusion, dental practitioners may satisfactorily restore severely damaged nonvital teeth using the endocrown technique. Composite endocrowns prepared using resin adhesive as modeler liquid or using bulk fill material may result in less aggressive failures, thus providing a new material perspective for endocrown restorations. |
| first_indexed | 2024-12-18T05:13:11Z |
| format | Article |
| id | doaj.art-c500d1d9fe0b4693b4581fb1e05c9f52 |
| institution | Directory Open Access Journal |
| issn | 1807-3107 |
| language | English |
| last_indexed | 2024-12-18T05:13:11Z |
| publishDate | 2019-02-01 |
| publisher | Sociedade Brasileira de Pesquisa Odontológica |
| record_format | Article |
| series | Brazilian Oral Research |
| spelling | doaj.art-c500d1d9fe0b4693b4581fb1e05c9f522022-12-21T21:19:50ZengSociedade Brasileira de Pesquisa OdontológicaBrazilian Oral Research1807-31072019-02-0133010.1590/1807-3107bor-2019.vol33.0012S1806-83242019000100206New material perspective for endocrown restorations: effects on mechanical performance and fracture behaviorJosé Augusto SEDREZ-PORTOEliseu Aldrighi MÜNCHOWLisia Lorea VALENTEMaximiliano Sergio CENCITatiana PEREIRA-CENCIAbstract The aim of this study was to investigate the mechanical performance and the fracture behavior of endocrown restorations prepared using distinct restorative materials. A total of 42 sound molars with similar crown size and shape were cut at 2 mm above the cementoenamel junction and endodontically treated. They were categorized according to the restorative material used to fabricate endocrown restorations (n=7), namely, conventional composite (Filtek™ Z350 XT), bulk fill composite (Filtek™ Bulk Fill), conventional composite modeled using resin adhesives (SBMP: Scotchbond™ Multipurpose Adhesive; or SBU: Scotchbond™ Universal Adhesive), and IPS e.max lithium disilicate (Ivoclar Vivadent; positive control). Unprepared sound teeth were used as negative control. All endocrowns were bonded using a self-adhesive cement (Rely-X™ U200). The teeth were submitted to fatigue (Byocycle) and fracture (EMIC DL500) testing. Load-to-fracture (in N) and work-of-fracture (Wf, in J/m2) values were analyzed by ANOVA (p < 0.05). The endocrowns did not fracture or de-bond upon fatigue, showing similar load-to-fracture and work-of-fracture values, regardless of the restorative material (p > 0.05). The endocrowns fabricated by combining Z350 and SBMP had the least harsh fractures, in contrast to endocrowns prepared using Z350 only, which exhibited an equilibrium between repairable and irrepairable fractures. The e.max endocrowns exhibited more aggressive failures (root fracture) than other groups, resulting in higher rates of irrepairable fractures. In conclusion, dental practitioners may satisfactorily restore severely damaged nonvital teeth using the endocrown technique. Composite endocrowns prepared using resin adhesive as modeler liquid or using bulk fill material may result in less aggressive failures, thus providing a new material perspective for endocrown restorations.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242019000100206&lng=en&tlng=enCeramicsFatigueComposite ResinsFiltek Bulk FillTooth Fractures |
| spellingShingle | José Augusto SEDREZ-PORTO Eliseu Aldrighi MÜNCHOW Lisia Lorea VALENTE Maximiliano Sergio CENCI Tatiana PEREIRA-CENCI New material perspective for endocrown restorations: effects on mechanical performance and fracture behavior Brazilian Oral Research Ceramics Fatigue Composite Resins Filtek Bulk Fill Tooth Fractures |
| title | New material perspective for endocrown restorations: effects on mechanical performance and fracture behavior |
| title_full | New material perspective for endocrown restorations: effects on mechanical performance and fracture behavior |
| title_fullStr | New material perspective for endocrown restorations: effects on mechanical performance and fracture behavior |
| title_full_unstemmed | New material perspective for endocrown restorations: effects on mechanical performance and fracture behavior |
| title_short | New material perspective for endocrown restorations: effects on mechanical performance and fracture behavior |
| title_sort | new material perspective for endocrown restorations effects on mechanical performance and fracture behavior |
| topic | Ceramics Fatigue Composite Resins Filtek Bulk Fill Tooth Fractures |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242019000100206&lng=en&tlng=en |
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