Çelik, HandanAlpöz, EsinAysel, AbdulhalimÖzkan, Özüm DaşdemirErtuğrul, FahinurAkar, Gülcan ÇoşkunGöde, Sercan2024-08-312024-08-3120242149-9063https://doi.org/10.69601/meandrosmdj.1508703https://search.trdizin.gov.tr/tr/yayin/detay/1254966https://hdl.handle.net/11454/103680Objective:This study aimed to evaluate the effects of a removable mandibular retractor appliance on the soft tissue profile and masseter muscle as an early intervention tool in children with anterior crossbite and the impact of this malocclusion on patient quality of life. Materials and Methods: The participants underwent cephalometric radiography for soft tissue measurement and ultrasonography for masseter muscle measurement before and after using a mandibular retractor appliance. Results: SN-GoMe, Max1-SN, Max1-NA, Max1-Na, and Ls-E values, increased and decreased in the inter-incisor mandibular plane angle in the 18 children who completed the 12-month treatment. Ultrasonographic evaluation of the masseter muscle demonstrated that the thickness of the muscle increased both at rest and during contraction. Conclusion: The regular use of the removable mandibular retractor appliance in individuals during growth directs the mandible downward and posteriorly, stimulates the anterior growth of the maxilla, and provides a treatment for anterior crossbite.en10.69601/meandrosmdj.1508703info:eu-repo/semantics/openAccessAnterior CrossbiteCephalometric Hard Tissue ChangesSoft Tissue ChangesMasseterTreatmentArticle25170771254966