The headgear is used to move the upper jaw back or anchor it in place while the lower jaw grows forward to catch up in patients where the front teeth stick out too far. With less elastic force on the headgear, teeth instead of bones can be moved back to provide a better fit or room for crowding in the upper jaw.he T-Rex is a fixed upper appliance designed to both widen the upper back teeth and move the upper molars back. It is used when the upper jaw is narrow and when the molars need to be moved back for a better bite with the lower and to create space for crowding or blocked-out teeth.
The mountain goat (Oreamnos americanus), also known as the Rocky Mountain goat, is a large hoofed mammal endemic to North America.A subalpine to alpine species, it is a sure-footed climber commonly seen on cliffs and ice.he mountain goat is an even-toed ungulate of the order Artiodactyla and the family Bovidae that includes antelopes, gazelles, and cattle. It belongs to the subfamily Caprinae (goat-antelopes), along with 32 other species including true goats, sheep, the chamois, and the muskox.
The mountain goat sports a coat of wooly, white fur that keeps it warm at high elevations. Known for their agility, mountain goats are most often seen scaling steep, rocky ledges. This extreme alpine environment provides them with adequate protection from predators.ehavior. Mountain goats are active both during the day and night, but take time to rest under overhanging cliffs. They mostly live in herds and move around according to season. In the summer, smaller groups will travel to salt licks.