Mindblown: a blog about philosophy.
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Zoledronate
A very potent intravenous nitrogen‐containing bisphosphonate used to prevent skeletal fractures in patients with cancers such as multiple myeloma and prostate cancer. It is also used to treat hypercalcemia caused by cancer.
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Zirconium oxide
Ceramic material used for implant components, with excellent mechanical properties. It is used in situations where esthetics are of primary importance and metal show‐through of the tissues is a potential problem. Called also zirconia.
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Zirconium dioxide (ZrO2) (syn)
Zirconia. White crystalline oxide of zirconium occurring in nature as the mineral baddeleyite. It is an amorphous, odorless, tasteless powder or crystalline solid, used as an opaquing agent for dental porcelain, and other ceramic processes. In implant dentistry, it is used for the fabrication of all‐ceramic abutments, substructures of fixed partial dentures, crown copings, and…
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Zirconium (Zr)
A steel‐gray hard ductile metallic element with a high melting point that occurs widely in combined forms. It is highly resistant to corrosion, and is used especially in alloys and in refractories and ceramics. A metallic element found only in combination; atomic weight, 91.22; atomic number, 40. It is used in corrosion-resistant alloys and as…
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Zirconia ceramic post
A ceramic post used instead of metal posts in the restoration of endodontically treated teeth. The ceramic material is preferred to the metal posts for esthetic reasons. Ceramic posts are usually used with a composite resin or compression ceramic to form the core.
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Zero‐degree teeth
Posterior denture teeth having flat planes or zero‐degree cusp angles relative to the horizontal occlusal surface of the tooth.
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Young’s modulus
Describes the rigidity or stiffness of a material, usually given the symbol E. It is a measure of elasticity equal to the ratio of the stress acting on a substance to the strain produced. A higher modulus (GPa, psi) signifies a greater rigidity or stiffness to the material. Also called modulus of elasticity.
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Yeast
Classified in the kingdom Fungi, these eukaryotic microorganisms are mostly unicellular but can become multicellular through the formation of pseudohyphae or strings of connected budding cells. Yeast can reproduce by mitosis, asymmetric division or budding. Yeast can become pathogenic in the body, including the oral cavity, especially in people who are immunocompromised through disease or…
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X‐ray tube
Vacuum tube designed to produce X‐ray photons. In the tube, there is a cathode to emit electrons into the vacuum and an anode to collect the electrons, where the X‐rays are produced by bremsstrahlung.
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X‐ray
Limited part of the spectrum of electromagnetic radiation; a self‐propagating transverse oscillating wave of electric and magnetic fields.
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