Stability of Class II Malocclusion Treatment with the Austro Repositioner Followed by Fixed Appliances in Brachyfacial Patients

Maria Dolores Austro-Martinez, Ana I. Nicolas-Silvente, Eugenio Velasco-Ortega, Alvaro Jimenez-Guerra and Jose A. Alarcon
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Maria Dolores Austro-Martinez: Department of Restorative Dentistry, School of Dentistry, CEIR Campus Mare Nostrum, University of Murcia, 30008 Murcia, Spain
Ana I. Nicolas-Silvente: Dental Pathology and Therapeutics, School of Dentistry, CEIR Campus Mare Nostrum, University of Murcia, 30008 Murcia, Spain
Eugenio Velasco-Ortega: Department of Comprehensive Dentistry for Adults and Gerodontology, University of Seville, 41009 Seville, Spain
Alvaro Jimenez-Guerra: Department of Comprehensive Dentistry for Adults and Gerodontology, University of Seville, 41009 Seville, Spain
Jose A. Alarcon: Section of Orthodontics, Faculty of Odontology, University of Granada, 18071 Granada, Spain

IJERPH, 2021, vol. 18, issue 18, 1-10

Abstract: One of the goals of functional-appliance devices is to modify the vertical growth pattern, solving several kinds of malocclusion. This study aimed to evaluate Class II malocclusion treatment’s stability with Austro Repositioner, followed by fixed appliances, and assess its capacity to modify vertical dimensions in brachyfacial patients. A test group of 30 patients (16 boys and 14 girls, mean 11.9 years old) with Class II malocclusion due to mandibular retrognathism and brachyfacial pattern treated with Austro Repositioner and fixed appliance were compared to a matched untreated Class II control group of 30 patients (17 boys and 13 girls, mean age 11.7 years old). Lateral cephalograms were taken at T1 (initial records), T2 (end of treatment), and T3 (one year after treatment). Statistical comparisons were performed with a paired-sample t -test and two-sample t -tests. Significant improvements in the skeletal Class II relationship were observed in the treated group. The ANB angle decreased (4.75°), the SNB angle increased (3.92°), and the total mandibular length (Co-Pg) increased (8.18 mm) ( p < 0.001). Vertical dimensions were also significantly modified, the FMA angle increased (3.94°), LAFH-distance increased (3.15 mm), and overbite decreased (3.35 mm). These changes remained stable one year after treatment. The Austro Repositioner was adequate for treating the skeletal Class II malocclusion resulting from the mandible retrusion in brachyfacial patients.

Keywords: angle class II; brachyfacial patients; fixed functional appliance; mandibular retrusion (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2021
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