Skeletal Class II treatment with Thurow appliance during mixed dentition phase

Paôla Caroline da Silva MIRA, Wendes Dias MENDES, Natália Saud Junqueira FRANCO, Maria Cecília Gorita dos SANTOS, Patrícia Maria MONTEIRO, Mírian Aiko Nakane MATSUMOTO, Maria Bernadete Sasso STUANI

Introduction: Class II, division 1, malocclusion has several etiologies, and its clinical and radiographic characteristics are aggravated with growth. Objective: To show a clinical approach to Class II skeletal malocclusion treatment using the Thurow appliance, highlighting its influence on bone growth. Description: Female patient, aged 8 years and 9 months, Class II division 1 molar occlusion, protruded maxillary incisors, 100% overbite and accentuated overjet. The cephalometric analysis showed that the maxilla was protruded in relation to the anterior skull base, while the mandible was retracted and had a Class II skeletal pattern. The treatment option was to install the Thurow appliance. Class II molar relationship and marked overjet correction were observed. In the final cephalometric analysis, the maxilla was well positioned in relation to the base of the skull, and mandible was still retracted. In the anterior region, the maxillary incisors were uprighted and retracted, while the mandibular incisors kept their initial position. Conclusion: The Thurow appliance acted by controlling maxillary growth and improving the relationship between the arches. In addition, it corrected the molar relationship and decreased the protrusion of the maxillary incisors.

Keywords: Malocclusion, Angle Class II. Orthodontic appliances. Dentition, mixed.

How to cite: Mira PCS, Mendes WD, Franco NSJ, Santos MCG, Monteiro PM, Matsumoto MAN, Stuani MBS. Skeletal Class II treatment with Thurow appliance during mixed dentition phase. Clin Orthod. 2021 Jun-Jul;20(3):112-24.

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