These are mostly removable braces and are sometimes called ‘block-braces’. They work in the growing patient to help posture the lower jaw forward so that the bite can be corrected. This can help to correct front teeth which are prominent. These braces need to be worn full time (removing only to eat and for sports) and treatment usually takes around 9-12 months. Fixed appliances are usually placed at the end of this treatment to align the teeth and close any residual gaps.