Three-dimensional evaluation of the maxillary effects of two orthopaedic protocols for the treatment of Class III malocclusion: A prospective study
| Autor: | Brittany Fischer, Cosimo Nardi, Lorenzo Franchi, Michele Nieri, Antonio Carlos de Oliveira Ruellas, James A. McNamara, Efisio Defraia, Veronica Giuntini, Caterina Masucci, Lucia H. S. Cevidanes |
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| Rok vydání: | 2018 |
| Předmět: |
Male
Cone beam computed tomography Palatal Expansion Technique Tooth Movement Techniques Orthodontics Class iii 03 medical and health sciences 0302 clinical medicine Primary outcome Imaging Three-Dimensional medicine Image Processing Computer-Assisted Maxilla Extraoral Traction Appliances Humans Orthodontic Appliance Design Rapid maxillary expansion 030212 general & internal medicine Prospective Studies Prospective cohort study Child Class iii malocclusion business.industry Anterior nasal spine 030206 dentistry Cone-Beam Computed Tomography medicine.anatomical_structure Malocclusion Angle Class III Orthopedics Otorhinolaryngology Child Preschool Surgery Female Oral Surgery Anatomic Landmarks business Early mixed dentition |
| Zdroj: | Orthodonticscraniofacial research. 21(4) |
| ISSN: | 1601-6343 |
| Popis: | Objectives To compare the three-dimensional maxillary dentoskeletal effects of a modified alternate rapid maxillary expansion and constriction facemask protocol (Alt-RAMEC/FM) with the traditional rapid maxillary expansion facemask protocol (RME/FM) performed in deciduous or early mixed dentition Class III patients. Setting and sample population Orthodontic Clinic of the Section of Dentistry of the Department of Surgery and Translational Medicine of the University of Florence. Thirty-four Class III patients were enrolled and allocated by alternating assignment to either Alt-RAMEC/FM or RME/FM therapy. Materials and methods Prior to treatment, all patients were evaluated, and a cone beam computed tomography (CBCT) scan was acquired. After completion of the orthopaedic therapy (average interval 1.2 years), a follow-up CBCT scan was obtained. Anatomic landmark identification on the CBCTs and subsequent quantification of the changes were performed. The primary outcome variable was the anteroposterior displacement of the anterior nasal spine (ANS AP). The treatment groups were compared with independent samples t tests. Results The patients in the two treatment groups showed a similar degree of compliance. No statistically significant differences were recorded for any variable when comparing the Alt-RAMEC/FM and RME/FM groups. In particular, the between-group difference for ANS AP was 0.0 mm (95%CI: -0.6;0.7, P = 0.933). Conclusions Both Alt-RAMEC/FM and RME/FM produced favourable orthopaedic changes in Class III growing patients. Neither protocol was superior to the other in terms of maxillary protraction effectiveness. |
| Databáze: | OpenAIRE |
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