Lower Lingual Holding Arch : The lower lingual holding arch and nance appliance are the common appliances used to maintain the space in the mouth and act as a space-maintainer. This appliance helps to keep the lower molar from shifting forward. Nance and lower lingual arch both work the same to maintain the space. Nance appliance has only one difference band connected with a stainless-steel wire connected to the top surface of the mouth. Depending on the case, your orthodontist will suggest which will work great.