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Patient missing lower primary molars, lingual holding arch (space maintainer) was placed to maintain spaces for permanent premolars to erupt. Photos courtesy of Dr. Lia Vo at the Vo Dentistry

Loss of space in the primary or mixed dentition is considered one of the main causes of malocclusion in the permanent dentition. Therefore, it is very important to maintain these spaces for permanent teeth to erupt normally. There are different types of appliances used to maintain spaces such as band and loop, Nance or transpalatal bar, and lingual holding arch depend on each situation.

Transpalatal bar

Lingual holding arch