Surgically Assisted Rapid Maxillary Expansion using Tooth borne vs. Bone borne Expanders; A Clinical Comparative Study

Abstract

Maxillary transverse deficiency in adults is a debated topic as regards the most suitable method of treatment. Orthodontic maxillary expansion has been used by orthodontists as the best treatment option, but adverse effects on the teeth and bone have been proven. Surgically assisted rapid maxillary expansion was found to be less damaging to dentoalveolar structures in adult patients requiring maxillary expansion. The aim of this study was to compare the effects of tooth-borne and bone-borne surgically assisted rapid maxillary expansion using the tri-partite osteotomy surgical technique. CBCT images were used to evaluate the difference between two different orthodontic appliances; the Hyrax appliance and Transpalatal Distractor. A sample of 24 adult subjects that required surgically assisted maxillary expansion was selected from the outpatient clinic of the Orthodontic Department in the Faculty of Dentistry, Ain Shams University. The patients were divided into 2 groups randomly. The first group were 12 patients who received Hyrax appliance while the second group were also 12 and received bone-borne Transpalatal Distractor. Three patients were lost in the first group