A disinfection-free pneumatic
turbine handpiece comprises a handpiece
assembly. A pneumatic
turbine assembly comprises a
turbine, bearings arranged at the upper end and the lower end of the turbine and a flexible blocking pad; the handpiece
assembly is provided with a connecting portion, a
handle assembly is connected to the back end of the connecting portion in an inserted mode, an air inlet hole and an air outlet hole are formed in the connecting portion, and an
insertion groove is formed in the connecting portion; the
handle assembly is provided with a convex portion inserted into the
insertion groove of the handpiece assembly, and an air
inlet channel and an air outlet channel which are connected with the air inlet hole and the air outlet hole in a butt-joint mode respectively are formed in the convex portion in a penetrating mode; the blocking pad is arranged between the convex portion and the bottom face of the
insertion groove of the handpiece assembly and comprises a base body, the base body is provided with an air inlet blocking block and an air outlet blocking block, the area of the air inlet blocking block is larger than that of the air
inlet channel and smaller than that of the air inlet hole, a notch is formed in the air outlet channel of the convex portion, and when the air outlet blocking block is impacted by flow-out air, the air outlet blocking block is flexibly bent to the notch to enable the air outlet hole to communicate with the air outlet channel. According to the disinfection-free pneumatic turbine handpiece, partial replacement of a pneumatic turbine
handle is achieved, and iatrogenic infection at the handle is avoided.