1. Introduction
Radicular cysts in deciduous teeth are commonly caused by dental pulp necrosis due to caries or trauma, which may affect the development and normal eruption of inherited permanent teeth[1]. In severe cases, it can cause root dilaceration of inherited permanent teeth, leading to impaction of those teeth[2]. In cases of radicular cysts in deciduous teeth, permanent tooth germs should be preserved whenever possible. Extraction of the affected deciduous teeth often allows smaller radicular cysts to resolve spontaneously. However, large radicular cysts can be decompressed and drained to protect the permanent tooth germs[3,4]. For impacted permanent teeth or root dilaceration, orthodontic traction is carried out at the early stage to induce normal eruption of permanent teeth and maintain the integrity of the dentition[5]. In this case report, we presented an 11-year-old boy who underwent decompression and drainage of a radicular cyst in deciduous teeth, followed by early orthodontic traction of inherited permanent teeth with root dilaceration. After treatment, the radicular cyst in deciduous teeth healed, the orthodontic traction of inherited permanent teeth was in place, and favorable treatment outcomes were achieved.