Class II, division 1 – from mixed to permanent dentition with functional and fixed orthopedic appliance

Vol. 14 – Number 54 – 2021 Case report Page 62-72 Class II, division 1 – from mixed to permanent dentition with functional and fixed orthopedic appliance Ivan Pedro Taffarel1 Fernando Augusto Casagrande2 Itamar Antonio Taffarel3 Thiago Martins Meira4 Orlando Tanaka5 Abstract Orthodontic treatment of Class II, division 1 malocclusion in one or two phases is still controversial in contemporary Orthodontics. The present clinical case presents the orthodontic treatment of a 6-year-old patient with aesthetic complaint regarding the smile and bullying, presenting skeletal Class II, Class II malocclusion, Angle division 1, overjet with exaggerated protrusion of the maxillary incisors, exaggerated overbite with the lower incisors touching the palatal mucosa, absence of lip sealing and concave inferior face profile. In Phase I, rapid maxillary expansion was performed with Hyrax-type expander together with the Herbst fixed functional orthopedic device for 11 months. In Phase II, the fixed orthodontic appliance associated with intermaxillary elastics was used for 13 months. The two-phase treatment of Class II malocclusion, division 1 showed to be effective after 24 months, establishing adequate occlusal and functional results and improving the aesthetics of the lower third of the face. Descriptors: Orthodontics, interception, Herbst, Class II, expander. 1 Specialist in Orthodontics, Professor of the Specialization Course in Orthodontics – PUC-PR, Diplomate of the Brazilian Board of Orthodontics and and Facial Orthopedics. 2 MSc in Dentistry, Orthodontics, PUC-PR, Professor of the Specialization Course in Orthodontics, PUC-PR. 3 Specialist in Orthodontics, MSc Student in Orthodontics, PUC-PR. 4 PhD in Dentistry, Orthodontics, PUC-PR, Professor, UNEB. 5 Professor, Undergraduate and Postgraduate in Dentistry – PUC-PR, Diplomate of the Brazilian Board of Orthodontics and Dentofacial Orthopedics, Post-doctorate – The Center for Advanced Dental Education at Saint Louis University. DOI: 10.24077/2021;1454-6272