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dc.contributor.authorNakamura, Keisuke
dc.contributor.authorHarada, A.
dc.contributor.authorInagaki, R.
dc.contributor.authorKanno, Taro
dc.contributor.authorNiwano, Y.
dc.contributor.authorMilleding, Percy
dc.contributor.authorØrtengren, Ulf Thore
dc.date.accessioned2015-06-01T12:48:45Z
dc.date.available2016-01-30T06:50:05Z
dc.date.issued2015-01-30
dc.description.abstractObjectives. The purpose of the present study was to analyze the relationship between fracture load of monolithic zirconia crowns and axial/occlusal thickness, and to evaluate the fracture resistance of monolithic zirconia crowns with reduced thickness in comparison with that of monolithic lithium disilicate crowns with regular thickness. Materials and methods. Monolithic zirconia crowns (Lava Plus Zirconia, 3M/ESPE) with specified axial/occlusal thicknesses and lithium disilicate crowns (IPS e.max press, Ivoclar/Vivadent) with regular thickness were fabricated using a dental CAD/CAM system and a press technique, respectively. The crowns cemented onto dies were loaded until fracture. Based on measurements of the crown thickness made by micro-CT and the fracture load, multiple regression analysis was performed. Results. It was revealed that the occlusal thickness significantly affected the fracture load (p<0.01) but the axial thickness did not (p=0.2828). Although the reduction of the occlusal thickness decreased the fracture resistance of the monolithic zirconia crowns, the fracture load of the zirconia crowns with the occlusal thickness of 0.5 mm (5558±522 N) was significantly higher than that of lithium disilicate crowns with an occlusal thickness of 1.5 mm (3147±409 N). Conclusion. Within the limitations of the present study, it was suggested that monolithic zirconia crown with chamfer width of 0.5 mm and occlusal thickness of 0.5 mm can be used in the molar region in terms of fracture resistance.en_US
dc.descriptionThis is the accepted manuscript version. Published version is available at <a href=http://dx.doi.org/10.3109/00016357.2015.1007479>Acta Odontologica Scandinavica</a>en_US
dc.identifier.citationActa Odontologica Scandinavica (2015) (Early Online, 1–7)en_US
dc.identifier.cristinIDFRIDAID 1238926
dc.identifier.doi10.3109/00016357.2015.1007479
dc.identifier.issn0001-6357
dc.identifier.urihttps://hdl.handle.net/10037/7699
dc.identifier.urnURN:NBN:no-uit_munin_7288
dc.language.isoengen_US
dc.publisherInforma Healthcare, Londonen_US
dc.rights.accessRightsopenAccess
dc.subjectcomputer-aided designen_US
dc.subjectlithium disilicateen_US
dc.subjectX-Ray microtomographyen_US
dc.subjectzirconium oxideen_US
dc.subjectVDP::Medisinske Fag: 700::Klinisk odontologiske fag: 830en_US
dc.subjectVDP::Medical disciplines: 700::Clinical dentistry disciplines: 830en_US
dc.titleFracture resistance of monolithic zirconia molar crowns with reduced thicknessen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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