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Fracture resistance of computer-aided design/computer-aided manufacturing-generated composite resin-based molar crowns

Harada, Akio ; Nakamura, Keisuke ; Kanno, Taro ; Inagaki, Ryoichi ; Örtengren, Ulf ; Niwano, Yoshimi ; Sasaki, Keiichi ; Egusa, Hiroshi

European journal of oral sciences, 2015-04, Vol.123 (2), p.122-129 [Periódico revisado por pares]

England: Blackwell Publishing Ltd

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Título:
Fracture resistance of computer-aided design/computer-aided manufacturing-generated composite resin-based molar crowns
Autor: Harada, Akio ; Nakamura, Keisuke ; Kanno, Taro ; Inagaki, Ryoichi ; Örtengren, Ulf ; Niwano, Yoshimi ; Sasaki, Keiichi ; Egusa, Hiroshi
Assuntos: ADAPTATION ; Algorithms ; BITE FORCE ; CAD/CAM ; CERAMIC CROWNS ; Ceramics - chemistry ; Clinical dentistry disciplines: 830 ; composite resin ; Composite Resins - chemistry ; Computer-Aided Design ; Crowns ; DENTAL CASTING ALLOYS ; Dental Materials - chemistry ; Dental Porcelain - chemistry ; Dental Prosthesis Design ; Dental Restoration Failure ; Dental Stress Analysis - instrumentation ; Dentistry ; FLEXURAL STRENGTH ; FRACTOGRAPHIC ANALYSES ; fracture resistance ; FREE POLYMER CROWNS ; Humans ; IN-VITRO ; Klinisk odontologiske fag: 830 ; lithium disilicate ; MARGINAL ; Materials Testing ; Medical disciplines: 700 ; Medisinske Fag: 700 ; Methacrylates - chemistry ; micro-CT ; Molar ; Odontologi ; Oral Surgery & Medicine ; Pliability ; Polyurethanes - chemistry ; POROSITY ; SINGLE CROWNS ; Stress, Mechanical ; Surface Properties ; VDP ; X-Ray Microtomography - methods
É parte de: European journal of oral sciences, 2015-04, Vol.123 (2), p.122-129
Notas: ArticleID:EOS12173
istex:E84AD515C55BED11980BF4D4EAB05271E112A9EF
Grant-in-Aid for Scientific Research (C) - No. 25462981, 2013
ark:/67375/WNG-NLWNP4D4-J
Ministry of Education, Science, Sports and Culture, Japan
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: The aim of this study was to investigate whether different fabrication processes, such as the computer‐aided design/computer‐aided manufacturing (CAD/CAM) system or the manual build‐up technique, affect the fracture resistance of composite resin‐based crowns. Lava Ultimate (LU), Estenia C&B (EC&B), and lithium disilicate glass‐ceramic IPS e.max press (EMP) were used. Four types of molar crowns were fabricated: CAD/CAM‐generated composite resin‐based crowns (LU crowns); manually built‐up monolayer composite resin‐based crowns (EC&B‐monolayer crowns); manually built‐up layered composite resin‐based crowns (EC&B‐layered crowns); and EMP crowns. Each type of crown was cemented to dies and the fracture resistance was tested. EC&B‐layered crowns showed significantly lower fracture resistance compared with LU and EMP crowns, although there was no significant difference in flexural strength or fracture toughness between LU and EC&B materials. Micro‐computed tomography and fractographic analysis showed that decreased strength probably resulted from internal voids in the EC&B‐layered crowns introduced by the layering process. There was no significant difference in fracture resistance among LU, EC&B‐monolayer, and EMP crowns. Both types of composite resin‐based crowns showed fracture loads of >2000 N, which is higher than the molar bite force. Therefore, CAD/CAM‐generated crowns, without internal defects, may be applied to molar regions with sufficient fracture resistance.
Editor: England: Blackwell Publishing Ltd
Idioma: Inglês

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Fracture resistance of computer-aided design/computer-aided manufacturing-generated composite resin-based molar crowns

Harada, Akio ; Nakamura, Keisuke ; Kanno, Taro ; Inagaki, Ryoichi ; Örtengren, Ulf ; Niwano, Yoshimi ; Sasaki, Keiichi ; Egusa, Hiroshi

England: Blackwell Publishing Ltd

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