Category: Z

A root‐form dental implant that has its origin in the region of the former first maxillary molar. Its endpoint engages the zygomatic bone. The implant is directed in a lateral and upward direction with an angulation of approximately 45° from a vertical axis, following an intrasinusal trajectory.  

The area formed by the union of the zygomatic bone with the zygomatic processes of the temporal and maxillary bones. The cheekbone. Zygoma, or zygomatic bone. The name given to a bridge of bone formed by the union of a process from the temporal bone in the skull with one from the malar (cheek) bone.…

Zirconium.  

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.  

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.  

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…

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…

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.  

Posterior denture teeth having flat planes or zero‐degree cusp angles relative to the horizontal occlusal surface of the tooth.