Efficacy of the Sander bite‐jumping appliance in growing patients with mandibular retrusion: a randomized controlled trial. (7th January 2013)

• Record Type: Journal Article
• Authors: Martina, R.; Cioffi, I.; Galeotti, A.; Tagliaferri, R.; Cimino, R.; Michelotti, A.; Valletta, R.; Farella, M.; Paduano, S.
• Is Part Of: Orthodontics and craniofacial research. Volume 16:Number 2(2013:May)
• Page Start: 116
• Page End: 126
• Publication Date: 2013-01-07
• Subjects: Skull -- Growth -- Periodicals; Facial bones -- Growth -- Periodicals; Orthodontics -- Periodicals; Orthodontics, Corrective -- Periodicals; Orthodontic appliances -- Periodicals; 617.51
• DOI: 10.1111/ocr.12013
• Languages: English
• ISSNs: 1601-6335

Abstract

<abstract abstract-type="main" id="ocr12013-abs-0001"> <title>Structured Abstract</title> <sec id="ocr12013-sec-0001" sec-type="section"> <title>Objectives</title> <p>The efficacy of functional appliances remains highly debated. This randomized controlled trial investigated the skeletal and dentoalveolar effects determined by the Sander bite‐jumping appliance (BJA). The null hypothesis to be tested was that the appliance would not induce supplementary mandibular growth compared to untreated controls.</p> </sec> <sec id="ocr12013-sec-0002" sec-type="section"> <title>Setting and Sample Population</title> <p>This study was carried out at the Section of Orthodontics, University of Naples Federico II, Italy. Forty‐six patients receiving a clinical diagnosis of skeletal and dental class II due to mandibular retrusion were either allocated to a treatment (23 patients;15 boys, 8 girls; mean age ± SD: 10.9 ± 1.3 years) or to an untreated control group (23 patients;11 boys, 12 girls; mean age ± SD: 10.5 ± 1.2 years), by using a balanced block randomization.</p> </sec> <sec id="ocr12013-sec-0003" sec-type="section"> <title>Methods</title> <p>Lateral cephalograms were taken before and after treatment and used for comparisons. Measurements were analyzed by descriptive statistics, univariate and multivariate statistical tests.</p> </sec> <sec id="ocr12013-sec-0004" sec-type="section"> <title>Results</title> <p>Treated individuals had a significant increase in mandibular length (6.4 ± 2.3 vs. 3.5 ± 2.5 mm; <italic>p </italic><<italic> </italic>0.001), overjet reduction (−5.0 ± 2.9 vs. 0.3 ± 1.2 mm; <italic>p </italic><<italic> </italic>0.001) and molar relationship improvement (−5.3 ± 2.4 vs. 0.1 ± 1.1 mm; <italic>p </italic><<italic> </italic>0.001) compared to controls. The use of the appliance did not significantly affect jaw divergence. Proclination of lower incisors was slightly greater (3.0°, <italic>p </italic>=<italic> </italic>0.023) in treated patients than in controls. The increase in mandibular length was not significantly influenced by cervical stage (<italic>p </italic>=<italic> </italic>0.40).</p> </sec> <sec id="ocr12013-sec-0005" sec-type="section"> <title>Conclusion</title> <p>The BJA can effectively correct class II malocclusions by a combination of dentoalveolar and skeletal effects. The long‐term stability of the correction needs to be evaluated.</p> </sec> </abstract>