There are several different types of "Growth Appliances" that can be used in young children. The Twin Block has separate upper and lower bite block components that work together as one. These two appliances interlock together to set the bite at an angle which postures the lower jaw forward into the ideal bite position. This enhances the growth of the lower jaw. For further information about the different types of growth appliances please feel free to contact a Sondhi-Biggs-Hansen Orthodontics team member.