Changes during treatment of class III malocclusion by Y appliance and appliance with screw according to Bertoni

Introduction/Objective. Class III malocclusion is caused by changes in skeletal and/or dentoalveolar structures with a typical mesial relationship of posterior teeth. The ?Y? appliance and the screw according to Bertoni can be used treating maxillary retrognathism period mixed dentition. aim study was determine compare on patients treated Y Bertoni. Methods. Forty were included this study. sample divided into two groups, 20 each group. including criteria retrognathism, dentition, pubertal growth. excluding mandibular prognathism, genetical predisposition for malocclusion, cleft lip palate or craniofacial syndrome, permanent appliances which most maxilla because all had deficiency Anamnesis, clinical functional testing, casts analysis, analysis orthopantomograms, lateral cephalograms, extraoral intraoral photos done patient. Therapeutic effects analyzed cephalograms after phase orthodontic treatment. Results. main effect protrusion upper incisors. Skeletal not significant. Conclusion. greater compared changes.