Biomechanical behavior of endodontically treated premolars using different preparation designs and cad/cam materials

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dc.creatorDiogo Pedrollo Lise
dc.creatorAnnelies Van Ende
dc.creatorJan de Munck
dc.creatorThaís Yumi Umeda Suzuki
dc.creatorLuiz Clovis Cardoso Vieira
dc.creatorBart Van Meerbeek
dc.date.accessioned2023-03-28T00:35:58Z
dc.date.accessioned2025-09-09T00:32:13Z
dc.date.available2023-03-28T00:35:58Z
dc.date.issued2017-04
dc.identifier.doihttps://doi.org/10.1016/j.jdent.2017.02.007
dc.identifier.issn03005712
dc.identifier.urihttps://hdl.handle.net/1843/51264
dc.languagepor
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofJournal of Dentistry
dc.rightsAcesso Aberto
dc.subjectEndodontics
dc.subjectBicuspid
dc.subjectTooth crown
dc.titleBiomechanical behavior of endodontically treated premolars using different preparation designs and cad/cam materials
dc.typeArtigo de periódico
local.citation.epage61
local.citation.spage54
local.citation.volume59
local.description.resumoObjectives: To evaluate the effect of restoration design (‘2.5-mm deep endocrown’, ‘5-mm deep endocrown’ or ‘5-mm deep post&crown’) and CAD/CAM material type (composite or lithium disilicate glass-ceramic) on the load-to-failure of endodontically treated premolars in absence of any ferrule. Methods: The crowns of 48 single-rooted premolars were cut and the roots were endodontically treated. Teeth were randomly divided into six groups (n = 8); teeth in each group were restored using one of the two tested materials with standardized CAD/CAM fabricated endocrowns (with either 2.5-mm or 5-mm deep intra-radicular extension) or conventional crowns (5-mm deep post&crown). After cementation using luting composite, the specimens were immersed in distilled water and subjected to 1,200,000 chewing cycles with a load of 50 N applied parallel to the long axis of the tooth (0 ). After cyclic loading, a compressive load was applied at 45 to the tooth’s long axis using a universal testing machine until failure. Load-to-failure was recorded (N) and the specimens were examined under a stereomicroscope with 3.5x magnification to determine the mode of failure. Results: All specimens survived the 1,200,000 chewing cycles. A significant interaction between restoration design and CAD/CAM material was found using two-way ANOVA. In the ‘2.5-mm deep endocrown’ groups, the composite achieved a significantly higher load-to-failure than the lithium disilicate glass-ceramic, while no differences between materials were found in the ‘5-mm deep endocrown’ and ‘5-mm deep post&crown’ groups. More unfavorable failures (root fractures) were observed for higher load-to-failure values. Conclusions: Only following a ‘2.5-mm deep endocrown’ design, composite appeared more favorable than lithium disilicate glass-ceramic as crown material; this may be explained by their difference in elastic modulus. Clinical significance: Shallow endocrown preparations on premolars present less surface for adhesive luting and a difference in crown material becomes apparent in terms of load-to-failure. The use of a more flexible composite crown material appeared then a better option
local.publisher.countryBrasil
local.publisher.departmentFAO - DEPARTAMENTO DE ODONTOLOGIA RESTAURADORA
local.publisher.initialsUFMG
local.url.externahttps://www.sciencedirect.com/science/article/pii/S0300571217300362?via%3Dihub

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