Abstract
BackgroundThe aim of this in study was the evaluation of treatment outcomes after using a hybrid hyrax-facemask combination in growing class III patients.MethodsTreatment of 16 children (mean age 9.5 ± 1.3 years) was investigated clinically and by means of pre- and post-treatment cephalograms. Changes in sagittal and vertical, and dental and skeletal values were evaluated and tested for statistically significant differences.ResultsAll mini-implants remained stable during treatment. Mean treatment duration was 5.8 ± 1.7 months. There was a significant improvement in skeletal sagittal values: SNA, +2.0°; SNB, -1.2°; ANB, +3.2°; WITS appraisal, +4.1 mm and overjet, +2.7 mm. No significant changes were found concerning vertical skeletal relationships and upper incisor inclination. In relation to A point, the upper first molars moved mesially about 0.4 mm (P = 0.134).ConclusionsThe hybrid hyrax-facemask combination seems to be effective for orthopaedic treatment in growing class III patients. Unwanted maxillary dental movements can be avoided due to stable skeletal anchorage.
Highlights
The aim of this in study was the evaluation of treatment outcomes after using a hybrid hyrax-facemask combination in growing class III patients
The orthopaedic treatment of class III malocclusion is efficient in patients during the early developmental phases [3,4,5,6,7]
Significant sagittal skeletal improvement could be achieved as shown by changes in SNA and WITS appraisal
Summary
The aim of this in study was the evaluation of treatment outcomes after using a hybrid hyrax-facemask combination in growing class III patients. Treatment of skeletal class III malocclusion still seems to be one of the most ambitious challenges in orthodontics This kind of malocclusion can be caused by a retrognathic maxilla, a prognathic mandible or a combination of both [1]. For patients with maxillary deficiency, the use of a facemask for protraction of the maxilla is one of the most common therapies. It was introduced by Delaire in 1971 [2]. The orthopaedic treatment of class III malocclusion is efficient in patients during the early developmental phases [3,4,5,6,7]. The literature provides evidence that this is an effective method to treat a maxillary deficiency [4]
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