Research Article

Transverse Dental Adaptations Following Goshgarian-Type Transpalatal Arch Treatment: Direct and Indirect Intermolar Effect

Abstract

This study investigates the biomechanical and clinical effects of the Goshgarian-type transpalatal arch (TPA) on inter-molar distances in patients with maxillary dental posterior crossbite. A sample of 100 patients was analyzed to enhance statistical reliability and clinical applicability. Results confirm the significant direct effect of the Goshgarian type TPA on maxillary first molars and the indirect effects on maxillary second molars and mandibular first molars. The thershold of 2.85 mm expansion of maxillary first molars required to obtain expansion of maxillary second molars is novel. Statistical analysis reveals that younger patients exhibit greater maxillary expansion, reinforcing the importance of early intervention. This study provides an in-depth discussion of anchorage control, longterm stability, and clinical biomechanics, highlighting the necessity for refined treatment protocols and future advancements in Goshgarian type TPA design and implementation.