Patent ID: 7104796

Claim:
A disposable prophy angle mounted to an electric tooth polisher having a controller connected to a power source and a handle connected to the controller through a cable and including a motor and a driving shaft rotatably mounted to the motor, wherein the disposable prophy angle is adapted to be mounted to the handle and comprises: a casing being hollow, adapted to be mounted to the handle, adapted to hold the driving shaft and having a cavity and a distal open end; a driven shaft mounted rotatably in the casing, adapted to engage the driving shaft, adapted to rotate in response to the motor and having a mount formed longitudinally on the driven shaft, extending out of the distal open end of casing and having a distal end; a proximal engaging element formed on the mount; and a distal engaging element formed on the mount close to the distal end of the mount; a surface-polishing member being annular and resilient, mounted detachably around the mount and having an axial through hole, an inner surface and an engaging element detachably engaging the proximal engaging element on the mount of the driven shaft; and a crevice-cleaning member being conical and resilient, mounted detachably on the mount of the driven shaft in the axial through hole of the surface-polishing member and having an engaging element detachably engaging the distal engaging element on the mount of the driven shaft.