What causes resorption of primary tooth roots, and what should be done about it?

In general, resorption of primary tooth roots refers to the gradual absorption of the root during the process of loosening of primary teeth, ultimately leading to their shedding. This is a normal phenomenon in the transition from primary to permanent dentition. The details are as follows:

The site of resorption in primary tooth roots is influenced by the position of the succeeding permanent teeth. Resorption of primary anterior teeth typically begins on the lingual side of the apical one-third of the root, whereas resorption of primary molars starts from the inner surface at the root bifurcation. If the succeeding permanent tooth is congenitally missing or malpositioned, resorption of the primary tooth root may be affected. Absence of the permanent tooth germ can result in slow resorption and delayed exfoliation of the primary tooth; mispositioned permanent tooth germs may fail to exert sufficient pressure on the primary tooth root, also causing delayed resorption.

Resorption of primary tooth roots usually does not require specific treatment, as it is a normal part of the process of tooth loosening and shedding. Parents should regularly bring their children for oral examinations and encourage them to eat appropriately hard, fiber-rich foods such as fresh fruits, vegetables, whole grains, and nuts. This helps strengthen masticatory function of the maxillofacial system and prevents retention of primary teeth.