Principles and phenomena of bioengineering with glass-ceramics for dental restoration

Höland, Wolfram; Rheinberger, Volker; Apel, Elke; Hoen, Christian van’t

doi:10.1016/j.jeurceramsoc.2006.04.101

Cited by 130 publications

(81 citation statements)

References 14 publications

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“…Scanning electron micrographs of IPS Empress® 2 revealed that the microstructures of lithium disilicates were elongated crystals with a mean grain length and diameter of 5.2 µm and 0.8 µm respectively [15]. In contrast to IPS Classic®, for which uncontrolled devitrification of leucites occurred only on the surface [27,28], the controlled crystallization of IPS Empress® 2 ensured that nucleation and crystal growth of lithium disilicates propagated uniformly throughout the bulk structure during heat treatments [26,28]. The nucleation in IPS Empress® 2 was achieved with the aid of special additives (e.g., P 2 O 5 , TiO 2 and ZrO 2 ) [29,30].…”

Section: Lithium Disilicate Glass-ceramics For Dentistrymentioning

confidence: 97%

Microstructural evolution and physical behavior of a lithium disilicate glass–ceramic

et al. 2015

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Section: Lithium Disilicate Glass-ceramics For Dentistrymentioning

confidence: 97%

Microstructural evolution and physical behavior of a lithium disilicate glass–ceramic

et al. 2015

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“…The reported studies concern, in particular, crystalline Li 2 Si 2 O 5 compound and Li 2 Si 2 O 5 based glasses exhibiting good mechanical properties and applicable e.g. in dentistry as a high--strength machinable glass ceramic [17,18] and as substrates in storage media [19]. As concerns the mechanical * corresponding author; e-mail: paszk@ifpan.edu.pl properties, the presence of Li 2 Si 2 O 5 crystals in the glass matrix enhances the strength of the glass [20].…”

Section: Introductionmentioning

confidence: 99%

Combined X-Ray Diffraction and Absorption Study οf Crystalline Vanadium-Doped Lithium Disilicate

et al. 2010

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Structure of vanadium-doped lithium disilicate, Li2Si2O5 (Ccc2 space group) is studied. This crystalline phase is obtained by annealing of the doped lithium disilicate glass for 4 h at 550• C. X-ray diffraction and X-ray absorption near-edge structure analysis indicate location of vanadium atoms at Si sites. the lattice parameters are found to increase isotropically with increasing vanadium content. the valency of vanadium ions is discussed on the basis of X-ray absorption near-edge structure results.

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“…Technical glass-ceramics as well as consumer applications were developed this way (Beall, 1992(Beall, , 2014Echeverría, 1992). Likewise, Höland et al (1994Höland et al ( , 2005Höland et al ( , 2007Höland et al ( , 2008Höland et al ( , 2009) succeeded in the development of lithium disilicate glass-ceramics for dental applications using such multicomponent base glass systems.…”

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confidence: 99%

Controlled Parallel Crystallization of Lithium Disilicate and Diopside Using a Combination of Internal and Surface Nucleation

et al. 2016

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In the mid-twentieth century, Dr. Donald Stookey identified the importance and usability of nucleating agents and mechanisms for the development of glass-ceramic materials. Today, a number of various internal and surface mechanisms as well as combinations thereof have been established in the production of glass-ceramic materials. In order to create new innovative material properties, the present study focuses on the precipitation of CaMgSi2O6 as a minor phase in Li2Si2O5-based glass-ceramics. In the base glass of the SiO2-Li2O-P2O5-Al2O3-K2O-MgO-CaO system, P2O5 serves as nucleating agent for the internal precipitation of Li2Si2O5 crystals, while a mechanical activation of the glass surface by means of ball milling is necessary to nucleate the minor CaMgSi2O6 crystal phase. For a successful precipitation of CaMgSi2O6, a minimum concentration of MgO and CaO in the range between 1.4 and 2.9 mol% in the base glasses was determined. The nucleation and crystallization of both crystal phases takes place during sintering a powder compact. Dependent on the quality of the sintering process, the dense Li2Si2O5-CaMgSi2O6 glass-ceramics show a mean biaxial strength of up to 392 ± 98 MPa. The microstructure of the glass-ceramics is formed by large (5-10 μm) bar-like CaMgSi2O6 crystals randomly embedded in a matrix of small (≤1 μm) plate-like Li2Si2O5 crystals arranged in an interlocking manner. While there is no significant influence of the minor CaMgSi2O6 phase on the strength of the material, the translucency of the material decreases upon precipitation of the minor phase.

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Principles and phenomena of bioengineering with glass-ceramics for dental restoration

Cited by 130 publications

References 14 publications

Microstructural evolution and physical behavior of a lithium disilicate glass–ceramic

Microstructural evolution and physical behavior of a lithium disilicate glass–ceramic

Combined X-Ray Diffraction and Absorption Study οf Crystalline Vanadium-Doped Lithium Disilicate

Controlled Parallel Crystallization of Lithium Disilicate and Diopside Using a Combination of Internal and Surface Nucleation

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