2019
DOI: 10.1111/jerd.12558
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Effect of staining and repeated firing on the surface and optical properties of lithium disilicate

Abstract: Objective: Evaluate the effect of staining and repeated firings on color, translucency and surface proprieties of CAD/CAM lithium disilicate (LD).Material and Methods: One hundred eighty LD discs were made (ISO 6872) and distributed in different groups (n = 20): control (CO)-no treatment; single-step characterization (SC)-crystallization and staining fired together; and double step characterization (DC)-crystallization and then staining. The samples were submitted to two, four, or six firings, resulting in nin… Show more

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Cited by 16 publications
(14 citation statements)
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References 26 publications
(43 reference statements)
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“…39 For this reason, if characterization of the monochromatic LDC is desired, a single characterization technique is recommended. 40 The translucency is controlled by the nano-structure and size of the crystals. 41 Some systems offer up to four levels of translucency:…”
Section: Optical Propertiesmentioning
confidence: 99%
See 1 more Smart Citation
“…39 For this reason, if characterization of the monochromatic LDC is desired, a single characterization technique is recommended. 40 The translucency is controlled by the nano-structure and size of the crystals. 41 Some systems offer up to four levels of translucency:…”
Section: Optical Propertiesmentioning
confidence: 99%
“…Repeated firing of LDC can change translucency and surface properties 39 . For this reason, if characterization of the monochromatic LDC is desired, a single characterization technique is recommended 40 …”
Section: Introductionmentioning
confidence: 99%
“…In addition to well‐known lithium disilicate, new lithium silicate ceramics containing 10% of zirconia dioxide were developed 17,18 . Porosities, crystallinity degree and crystal organization can be changed by thermal treatments, impacting the color and strength of glass‐ceramics 19,20 . Although laboratory procedures such as additional firings have been investigated, further investigations for lithium disilicate materials have been performed with evidence that it may affect the color parameters 21,22 .…”
mentioning
confidence: 99%
“…The effect of biodegradation on roughness was noticed as the Ra values of NO- ctrl and SG- ctrl were similar, but NO- bi presented lower Ra values than SG- bi . Such effect could be explained by both the amount and size of crystals in the stain/glaze and in the LD ceramic ( Vo et al, 2015 , Miranda et al, 2020b ), and the fabrication method; while NO samples were produced by machining, SG samples received additional hand application of stain and glaze, which may have resulted in an irregular and porous surface with macroscopic defects ( Vo et al, 2015 , Miranda et al, 2020b , De Jager et al, 2000 , Sun et al, 2016 , Hmaidouch et al, 2014 ).…”
Section: Discussionmentioning
confidence: 99%