Twin block how it works Rootz dental care navalur best dental clinic How It Works at best dental clinic The appliance consists of two separate parts—one for the upper jaw and one for the lower jaw—each with bite blocks that interlock at an angle. When the patient bites down, these blocks guide the lower jaw forward into a corrected position. Over time, this forward positioning becomes permanent as the jawbones adapt to the new alignment . Treatment with a Twin Block appliance typically lasts between 12 to 18 months. The appliance is usually worn full-time, including during meals, to maximize effectiveness. Periodic adjustments may be necessary to ensure optimal progress. After the active treatment phase, we at Rootz dental care navalur provide a retainer may be used to maintain the new jaw position while the bone and soft tissues stabilize .