2018
DOI: 10.4012/dmj.2016-365
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Abstract: The aim of this study was to investigate that heat treatments with different numbers applied to superstructure porcelain whether effects microstructure and mechanical properties of lithium disilicate ceramic (LDC). Eighty disc-shaped specimens were fabricated from IPS e.max Press. Specimens were fired at heating values of porcelain in different numbers and divided four groups (n=5). Initial Vickers hardness were measured and X-ray diffraction (XRD) analysis was performed. Different surface treatment were appli… Show more

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Cited by 20 publications
(10 citation statements)
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“…Studies have shown that increasing the number of firing cycles adversely affects the mechanical properties of LDGC materials [ 11 , 24 ]. Those results are in accordance with our data, which showed that the hardness and Young’s modulus deteriorated significantly after dual sintering at 840 °C (Fig.…”
Section: Discussionmentioning
confidence: 99%
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“…Studies have shown that increasing the number of firing cycles adversely affects the mechanical properties of LDGC materials [ 11 , 24 ]. Those results are in accordance with our data, which showed that the hardness and Young’s modulus deteriorated significantly after dual sintering at 840 °C (Fig.…”
Section: Discussionmentioning
confidence: 99%
“…According to literatures, X-ray diffraction (XRD) shows good sensitivity for identifying phase transformations [ 6 , 9 ]. However, XRD cannot be used to analyze the small discrepancies among mature LDGC materials heated at high temperature because the LD phase becomes the predominant phase in these materials [ 10 , 11 ]. Therefore, the mechanical and microstructural evolution of LDGC under altered thermal conditions is still not fully known.…”
Section: Introductionmentioning
confidence: 99%
“…The orientation, shape, and distribution of crystal sizes, homogeneity, and the proportion of the glassy matrix and crystalline phase control the exural strength and fracture toughness of the glass-ceramic materials [2,28]. The surface morphology showed for all groups that the crystals have lath-shaped [6,29] and an interlocked microstructure that is an important characteristic for the mechanical performance of the material [3,10,11,23,30] because it allows during the de ection of the crack that the path that it would have to travel increases and consequently consumes more energy [3,10,11].…”
Section: Discussionmentioning
confidence: 99%
“…Consequently, it has become an important veneer material for double-layer ceramic crowns [9,10]. The newly developed CAD/CAM lithium disilicates possess a flexural strength of approximately 360 MPa, which is sufficient to be used for posterior monolithic restorations [11,12].…”
Section: Introductionmentioning
confidence: 99%