Mandibular transverse dentoalveolar and skeletal changes associated with lip bumper and rapid maxillary expander: A cone-beam computed tomography study.

Introduction: Currently, there is little consensus regarding the spontaneous uprighting of the mandibular dentoalveolar complex in response to maxillary expansion, which poses the question about the necessity of combining mandibular treatment with rapid maxillary expansion to coordinate the maxilla and mandible transversely. This study aimed to evaluate the effects of the bonded rapid maxillary expander (RME) alone compared with RME with lip bumper (LB) treatment on the mandibular transverse changes.

Methods: This retrospective study analyzed 3 groups: the control group with no orthodontic or orthopedic treatment (23 patients [14 females, 9 males]; mean age 9.

Lip Bumper Therapy Does Not Influence the Sagittal Mandibular Incisor Position in a Retrospective CBCT Study.

Lip bumper (LB) therapy is used as a treatment approach for mild to moderate crowding without extraction of teeth. Previous studies demonstrated that LB increases arch length through molar uprighting and lateral expansion. However, the effects of LB on mandibular incisors are inconclusive.