Comparison of Class II malocclusion treatment using Twin Block and prefabricated Myobrace appliances

Perbandingan perawatan maloklusi Kelas II dengan piranti Twin Block dan Myobrace fabricated

Abstract

Class II malocclusion is one of the most prevalent orthodontic anomalies and may adversely affect masticatory function, facial aesthetics, and the patient’s psychosocial well-being. Various functional appliances, including the Twin Block and Myobrace, have been utilized to modify mandibular growth and improve maxillomandibular relationships. This literature review aims to compare the effectiveness of these two appliances based on changes in ANB angle, overjet, and facial profile, from clinical trials and systematic reviews. Myobrace has demonstrated improvement in myofunctional habits, with an average overjet re-duction of approximately 2-2.5 mm and a decrease in ANB angle of around 1°. Meanwhile, the Twin Block appliance exhibits more pronounced skeletal ef-fects, achieving an overjet reduction of up to 4-5 mm and an ANB decrease of 1.5-2°, along with more evident enhancement of facial profile aesthetics. I tis concluded that both appliances are effective for the treatment of Class II malocclusion during growth periods; however, Twin Block provides superior ske-letal correction, whereas Myobrace is more beneficial in improving orofacial muscle function.