Andriana Phatouros1, Mithran S Goonewardene. 1. Department of Orthodontics, Dental School, University of Western Australia, Nedlands, Western Australia, Australia.
Abstract
INTRODUCTION: The purpose of this retrospective study was to estimate the area change of the palate after rapid maxillary expansion (RME) in the early mixed dentition stage by using a 3-dimensional (3D) helical computed tomography (CT) scanning technique. In addition, linear changes in the maxillary arch were evaluated. METHODS: The treated sample consisted of 43 children (mean age, 9 years 1 month) treated with a bonded RME appliance. The untreated control group consisted of 7 children (mean age, 9 years 3 months). Pretreatment and posttreatment dental casts were evaluated by using 3D helical CT scanning procedures. The Student t test was used to compare the linear, area, and angular differences between the treatment times. RESULTS: RME produced clinically significant increases in interdental widths across the canines, the deciduous first molars, and the permanent first molars in the maxillary arch. Significant increases in cross-sectional area were observed across the permanent first molars (15.3 mm(2)). There was marked variability in the buccal tipping of the permanent first molars. CONCLUSIONS: Three-dimensional helical CT scanning is an accurate and cost-effective method of assessing dental cast morphologic changes. It can also provide fast and accurate data acquisition and subsequent analysis.
INTRODUCTION: The purpose of this retrospective study was to estimate the area change of the palate after rapid maxillary expansion (RME) in the early mixed dentition stage by using a 3-dimensional (3D) helical computed tomography (CT) scanning technique. In addition, linear changes in the maxillary arch were evaluated. METHODS: The treated sample consisted of 43 children (mean age, 9 years 1 month) treated with a bonded RME appliance. The untreated control group consisted of 7 children (mean age, 9 years 3 months). Pretreatment and posttreatment dental casts were evaluated by using 3D helical CT scanning procedures. The Student t test was used to compare the linear, area, and angular differences between the treatment times. RESULTS:RME produced clinically significant increases in interdental widths across the canines, the deciduous first molars, and the permanent first molars in the maxillary arch. Significant increases in cross-sectional area were observed across the permanent first molars (15.3 mm(2)). There was marked variability in the buccal tipping of the permanent first molars. CONCLUSIONS: Three-dimensional helical CT scanning is an accurate and cost-effective method of assessing dental cast morphologic changes. It can also provide fast and accurate data acquisition and subsequent analysis.
Authors: Craig McMullen; Najla N Al Turkestani; Antonio C O Ruellas; Camila Massaro; Marcus V N N Rego; Marilia S Yatabe; Hera Kim-Berman; James A McNamara; Fernanda Angelieri; Lorenzo Franchi; Peter Ngan; Hong He; Lucia H S Cevidanes Journal: Am J Orthod Dentofacial Orthop Date: 2021-12-31 Impact factor: 2.711
Authors: Sina Haghanifar; Sadaf Mahmoudi; Ramin Foroughi; Arash Poorsattar Bejeh Mir; Abas Mesgarani; Ali Bijani Journal: Electron Physician Date: 2017-03-25