Cracks formed by Vickers indentation adjacent to the interface in bonded dental ceramics with various marginal angles

The objective of this study was to assess the influence of the ceramic marginal angle on the length and nature of indentation cracks in ceramics near the ceramic/resin bonded interface. Disks of a leucite-reinforced ceramic or a diopside-based glass-ceramic bonded to a resin composite were sectioned...

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Veröffentlicht in:Dental Materials Journal 2011, Vol.30(3), pp.308-314
Hauptverfasser: NISHIDE, Akihito, YAMAMOTO, Takatsugu, MOMOI, Yasuko, SWAIN, Michael V.
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container_end_page 314
container_issue 3
container_start_page 308
container_title Dental Materials Journal
container_volume 30
creator NISHIDE, Akihito
YAMAMOTO, Takatsugu
MOMOI, Yasuko
SWAIN, Michael V.
description The objective of this study was to assess the influence of the ceramic marginal angle on the length and nature of indentation cracks in ceramics near the ceramic/resin bonded interface. Disks of a leucite-reinforced ceramic or a diopside-based glass-ceramic bonded to a resin composite were sectioned so that the ceramic marginal angles were 45, 60, and 90°. Vickers indentations were placed in the ceramic at various distances from the bonded interface. The lengths of the indentation cracks running near parallel to the interface were measured and the orientation of crack propagation was characterized. The crack length and orientation were significantly affected by the distance from the interface and by the marginal angle, respectively. The crack length extended as the distance from the interface was shortened. Smaller marginal angles resulted in more oblique cracks. The toughness of the ceramic affected the indentation crack length, shape, and direction.
doi_str_mv 10.4012/dmj.2010-115
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source J-STAGE Free; MEDLINE; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals
subjects Aluminum Silicates - chemistry
Ceramic
Ceramics - chemistry
Composite Resins - chemistry
Crack
Dental Bonding
Dental Cements - chemistry
Dental Materials - chemistry
Dental Porcelain - chemistry
Dental Stress Analysis - instrumentation
Dentistry
Elastic Modulus
Fracture toughness
Hardness
Humans
Interface
Margin
Materials Testing
Microscopy, Confocal
Resin Cements - chemistry
Silicic Acid - chemistry
Stress, Mechanical
Surface Properties
title Cracks formed by Vickers indentation adjacent to the interface in bonded dental ceramics with various marginal angles
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