Correção de classe II infantil, Divisão 1, com AEB de Thurow e Bionator de Balters: relato de caso

Abstract

The dentoskeletal characteristics of Class II, Division 1 malocclusion may be caused by skeletal dysplasia, maxillary prognathism, mandibular retrusion, or a combination of these.The use of the Extraoral Appliance (EOA), which has the ability to restrict anterior growth of the maxilla in growing patients, is widely utilized in such cases. Among the models, there is the Thurow Appliance, which differs from the conventional EOA by having a maxillary splint, allowing for mass control of all teeth. Another commonly used device, often associated with the treatment of Class II, is the Balters Bionator. It is an orthopedic appliance, a mandibular propulsor, that acts on mandibular growth. This study aims to report a pediatric treatment for Class II using the Thurow Appliance and Balters Bionator. The study has a descriptive and qualitative approach, employing Interceptive Orthodontics, with data obtained from the records of the Integrated Improvement Center (CIA) and complementary exams. The case describes a female patient, 8 years old, diagnosed with Class II, Division 1 malocclusion, protruded maxilla, retruded mandible, protrusion of the upper incisors, with marked overjet and overbite, presenting mixed dentition and anterior-inferior crowding. The treatment was carried out using the Thurow EOA to restrict maxillary growth and the Schwarz appliance to correct the crowding. After the use of the Thurow EOA, the Balters Bionator was employed to protrude the mandible. The case was concluded, correcting the Class II and mandibular dental crowding, leading to the conclusion that proper planning and orthopedic intervention at the correct period resulted in excellent aesthetic and functional outcomes.