Influence of residual surface investment material on crystallization shrinkage of a mica-based glass-ceramic

Yamamoto, Takatsugu; Takamizu, Masaaki; Kohno, Atsushi

doi:10.1016/s0109-5641(01)00059-8

Cited by 4 publications

(1 citation statement)

References 9 publications

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“…16 In relation to procedures for casting dental alloys, certain defects in the final metal dental alloy superstructures may result from the casting process, such as porosity due to poor filling, shrinkage, or dissolved gases; chemical segregation that results in nonuniform properties due to the physical chemistry of solidification; and contamination due to mould-casting interactions. 32 Despite the few studies in the literature that evaluated investment influence on ceramic prop-erties, 18,26 the surface of investment materials are shown to react with the ceramics and affect the surface and shrinkage crystallization, 26,33 surface roughness, 17 biaxial flexural strength, and the fit of ceramic restorations. 30 A rough or irregular texture surface will reflect an irregular and diffuse pattern of light, therefore modifying the color of aesthetic restorations.…”

Section: Discussionmentioning

confidence: 99%

The Effect of Investment Materials on the Color of Feldspathic Ceramics

et al. 2011

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Objectives:The aim of this study was to evaluate the influence of investment type on the color of feldspathic ceramics.Methods:Ceramic specimens were constructed using the refractory die technique, using four investments (i.e., Vitadurvest, Duravest, Duceralay Superfit, and Fortune) to observe their effect on the color of five commercially available ceramics (i.e., Super Porcelain EX-3, Vision Esthetic, Vintage Halo, IPS Classic, and Vitadur Alpha). The color analysis of the ceramics was performed with a colorimeter using the CIE L*a*b* color coordinates.Results:The investments produced significant alterations on a*, b*, and L* color parameters of the ceramics tested. The ceramic Vision Esthetic was influenced by the type of investment in all color parameters (P<.05). Two investments (Duravest and Fortune) produced alterations in color parameters with three of the five ceramics tested.Conclusions:The investment materials produced alterations on the ceramic color parameters, resulting in unacceptable chromatic alterations (ΔE*).

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