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Mineral trioxide aggregate (MTA) is an alkaline, cementitious dental repair material. MTA is used for creating apical plugs during apexification, repairing root perforations during root canal therapy, and treating internal root resorption. It can be used for root-end filling material and as pulp capping material.
The structures adopted by Bi 2 O 3 differ substantially from those of arsenic(III) oxide, As 2 O 3, and antimony(III) oxide, Sb 2 O 3. [2] Existence domains of the four polymorphs of Bi 2 O 3 as a function of temperature. (a) The α-phase transforms to the δ-phase when heated above 727 °C, which remains the structure until the melting point ...
Organoiridium compounds share many characteristics with those of rhodium, but less so with cobalt. Iridium can exist in oxidation states of -III to +V, but iridium(I) and iridium(III) are the more common. iridium(I) compounds (d 8 configuration) usually occur with square planar or trigonal bipyramidal geometries, whereas iridium(III) compounds (d 6 configuration) typically have an octahedral ...
Hydrated iridium trichloride, a common salt of iridium. The coordination complexes of iridium are extensive. Iridium in its complexes is always low-spin. Ir(III) and Ir(IV) generally form octahedral complexes. [2] Polyhydride complexes are known for the +5 and +3 oxidation states. [11] One example is IrH 5 (P i Pr 3) 2. [12] The ternary hydride ...
Air abrasion is a dental technique that uses compressed air to propel a thin stream of abrasive particles—often aluminum oxide or silica—through a specialized hand-piece to remove tooth tissue and decay before being suctioned away, similar to sand blasting.
Pamela Anderson and movie producer Jon Peters were widely reported to be married briefly in January 2020, though Anderson has since said they never legally wed
2. Excessive Stress. Stress is a natural, normal part of the human experience, and your body knows how to handle it. When you’re under stress, your body releases stress hormones that activate ...
Applications include their use as NMR "shift reagents" and as catalysts for organic synthesis, and precursors to industrial hydroformylation catalysts. C 5 H 7 O − 2 in some cases also binds to metals through the central carbon atom; this bonding mode is more common for the third-row transition metals such as platinum(II) and iridium(III).