Liquid nitrogen is very cheap because it is a by-product of the production of liquid oxygen. Nitrogen is obtained from liquid air by distillation at -196Â°C. The gas obtained by this process is actually a mixture of nitrogen and about 1.25% noble (or inert) gases, argon, neon, krypton, and xenon.
Damon braces or any of the self-ligating bracketing systems are pretty standard now in orthodontic offices. It varies greatly by city or region, depending where you live, so anywhere between $4000 and $6000.
1 However, a retainer is usually included in the overall braces fee, so there is no additional charge for the first set of retainers -- and some orthodontists include one or two replacements in their standard braces package. 2  If not included, replacement retainers can cost $70-$250 for one or $140-$500 or more for a set.