An Atypical Soft Tissue Response to Maxillary Skeletal Expander: A Case Report

Mini-implant-assisted rapid palatal expansion (MARPE) is widely used to correct transverse maxillary deficiency in late adolescents and young adults because of its enhanced skeletal effects and minimal dentoalveolar side effects. Although several appliance- and patient-related complications have been reported, unusual soft-tissue reactions remain poorly documented. This case report brings attention to the occurrence of soft tissue proliferation around MARPE, an issue that has received limited emphasis in the literature.