The two blocks in the twin block functional appliance are angulated at (Or) The angle of inclined plane in clarke's twin block is: (A) 45°, (B) 70°, (C) 65°, (D) 80°
Answer is B. "Twin - Block appliance" is the most acceptable functional appliance and was introduced by William Clark. The appliance consists of a upper and lower appliances with posterior bite blocks. The upper and lower bite blocks interlock at an 70°