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MEDICAL AND DENTAL GLASS-CERAMICS

In the development of biocompatible and bioactive glass-ceramics for medical uses, two different types of materials must be addressed that differ in their application environment and preferred properties materials for use in implantology (medical prostheses) and materials used in restorative dentistry (dental prostheses). For reasons of clarity, the difference between the two different groups of biomaterials must be addressed at this stage. The first [Pg.272]

The situation with regard to glass-ceramics for restorative dental applications is different. These materials must also fulfill the standards for biomaterial use, such as compatibility with the oral environment. Bioactivity on the surface of the dental restoration, however, must not occur. More importantly, the surface properties of the glass-ceramics, such as shade, translucency, toughness, and wear, must correspond to those of natural teeth. Even higher standards are placed on the chemical durability of the material compared with that of natural teeth, since cavities should not occur in the new glass-ceramics. [Pg.273]

As a result of these different requirements, distinct chemical systems are used, and the development of the glass-ceramic materials is concentrated on different main crystal phases (see Sections 1.3, 2.1.1, 2.2.9, 2.3.1, 2.4, and 2.6.5) and, therefore, different properties. [Pg.273]

The following bioactive glass-ceramics are used for implants in human medicine CERABONE (apatite-wollastonite glass-ceramic), CERAVITAL (apatites devitrite glass-ceramic), and BIOVERJT I (mica-apatite glass-ceramic). [Pg.274]

Other apatite-containing glass-ceramics (Ilmaplant LI and Ap40) were reported by Steinborn et al. (1993). [Pg.274]


Selected examples in Section 4.4.2.6.B are used to describe the processes that are suitable to achieve optimal joining of the different materials. In addition, measuring methods for evaluating the results were carried out. These glass-ceramic-metal composites for dental applications demonstrate that a multicomponent glass-ceramic and metals can be used for a variety of applications in medical and technical fields. [Pg.302]

Biomaterials are synthetic or natural materials that are in contact with biological tissues or fluids and may enhance or replace tissues, bones, organs, or body functions (4). They include metals, alloys, glasses, ceramics, natural or syndetic polymers, biomimetics, and composites. Typical biomaterials may be used in artificial skin, tissues, and bones, dental fillings, wire plates and pins for bone repair, artificial hips and joints, implantable drug delivery systems, and other dental, surgical, and medical devices. New and improved biomaterials continue to be sought... [Pg.8]


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