Such full-contoured restorations not only offer excellent esthetic values, they are virtually unbreakable.It is reported that several additional systems for milling full-contour restorations will be introduced during the 2010 Chicago Mid-Winter exhibition.Zirconium-89 is employed in specialized diagnostic applications using positron emission tomography imaging, for example, with zirconium-89 labeled antibodies (immuno-PET).Zr is a radioisotope of zirconium with a half-life of 1.53 million years, decaying with a low-energy beta particle to niobium-93, which decays with a halflife of 14 years and a low-energy gamma ray to ordinary Nb. The low specific activity and low energy of its radiations limit the radioactive hazards of this isotope.ZIRCON-BRITE will polish the crown in virtually in seconds!
Recently, several manufacturers have introduced CAD/CAM systems and materials designed to mill full contoured crowns and bridges entirely from Zirconium.
Zircon is used widely in industry as the main source for the metal zirconium used in steel alloys, abrasives and jet engines.
Although colorless zircon was used in history as a diamond simulant, it has nothing to do with the now popular cubic zirconia, or zirconium oxyde which is a laboratory grown material.
All heavier elements are formed either through asymmetric fusion or during the collapse of supernovae.
As most of these are energy-absorbing processes, most nuclides of elements heavier than zirconium are theoretically unstable to spontaneous fission, although in many cases, the half-life for this is too long to have been observed. Zr is a radioisotope of zirconium with a half-life of 78.41 hours.