It looks impossible to change the angle of the brush, meaning only the major face of each tooth gets touched by the bristles. This seems more to do with 3D prin

It looks impossible to change the angle of the brush, meaning only the major face of each tooth gets touched by the bristles. This seems more to do with 3D printing, than dentistry. What is interesting is the change from mass produced to 'mass customization' where things are made with efficiencies of scale, yet each one can be unique (within limits).