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 is the segment of vertebral bone that joins the superior and inferior articular facets. Because of this location, a pars defect injection technique is similar to a facet joint injection.Many providers report the procedure as a facet joint injection, with 64493.Diagnosis choices: A pars defect may be congenital (756.11, Congenital spondylolysis, lumbosacral region) or due to trauma, stress, or sports injuries (738.4, Acquired spondylolisthesis).any providers report the procedure as a facet joint injection, with 64493. Diagnosis choices: A pars defect may be congenital (756.11, Congenital spondylolysis, lumbosacral region) or due to trauma, stress, or sports injuries (738.4, Acquired spondylolisthesis).