Twin Block, Bionator and Frankel II: comparative study

Many appliances are described in the literature in the second molars class where you want to obtain a mandibular advancement . The aims of this study is to compared, with a literature review using PubMed from 1998 to 2016, dental and skeletal effects of Twin Block, the Bionator and Frankel II. The final results found in our research is that the Twin block appliances determines a greater positive torque of the lower incisors togheter with the benefit of significant mandibular growth. Still today there are different opinions about the mandibular growth, some works in literature said that they are due with the advancement get by the use of these functional device, other says that the mandibular growth is link with the differential growth of the two jaws. However we have to remember that these devices are dependent on compliance and is difficult to compare dental and skeletal effects that have in individual patients.