Electrum is a metal alloy mainly consisting of gold, silver and traces of some other metals. This naturally occurring alloy has a long history of being used for making coins, vessels and also for coatings. It was referred to as âgoldâ or âwhite goldâ by ancient Greeks.
In Interstitial defect, atom occupies the interstitial space of the lattice structure of solid crystal. In Substitutional defect, the foreign atom occupies only the lattice site of a crystalline solid. Interstitial defect may occur by the atoms of either same solid (called self-interstitial) or foreign material. Substitutional defect is always caused by foreign atoms.
The pars interarticularis links the posterior part of the vertebrae (facet joint) to the anterior body of the vertebrae. Because of this location, a pars defect injection technique is similar to a facet joint injection. Many providers report it as a facet joint injection, with 64493.A pars defect may be congenital (756.11, Spondylolysis, lumbosacral region) or due to trauma, stress or sports injuries (738.4, Acquired spondylolisthesis).ecause of this location, a pars defect injection technique is similar to a facet joint injection. Many providers report it as a facet joint injection, with 64493. A pars defect may be congenital (756.11, Spondylolysis, lumbosacral region) or due to trauma, stress or sports injuries (738.4, Acquired spondylolisthesis).