Malocclusion correction in adolescent patient using MOSAS mini-screw: Clinical Case

Abstract

Introduction: Mini-screws are an increasingly common tool in orthodontic practice for efficiently correcting the malocclusion in young patients.The aim was reduce orthodontic treatment times and avoid the initial stage of conventional braces, using a mini-screw to correct malocclusion. Case Description: 15-year-old female patient, Class II Skeletal, dolichofacial, permanent dentition, canine and molar class I in MIP, #17 buccally, with premature contact, mandibular deviation, and LHS with open bite. MOSAS mini-screw of 1.6 × 8 mm was placed on the palate, under the resistance center, apical position between #16 #17, to control its palatinization and intrusion. The mini-screw was immediately activated with an elastic chain. Bilateral occlusal stops were placed using composite to correct the posterior bite. The elastic chain was activated monthly until the intrusion and palatalization of #1.7 were achieved.The entire treatment was satisfactory and well tolerated by the patient. The mini-screw stayed in place without complications. #17 alignment was achieved three months after the initial activation. Once occlusal stops were removed, the patient was in bilateral canine and molar class I, and LHS lateral open bite was corrected. A review two months after the treatment showed a stable occlusion. Discussion: The use of mini-screws in orthodontics could offer many advantages, including faster and more precise correction of different types of malocclusion even more efficient than traditional orthodontics treatments. (Ishihara, 2014) In this case we did not use braces. Conclusion/Clinical Significance: Using a palatal MOSAS mini-screw to correct malocclusion in a 15-year-old patient was an effective and well-tolerated technique to avoid the initial stage of conventional braces.