Безопасное препарирование корневого канала: реципрокное движение

One file endo -- root canal preparation with just one instrument. A revolutionary idea. The question is: how can this be possible? The answer is in the unique reciprocating movement. The instrument alternates between clockwise and counterclockwise rotation. Due to the fact that the rotation in the cutting direction is larger than the reverse rotation, the instrument advances towards the apex. At the same time, reciprocation ensures that the instrument stays centred in the canal. The reverse rotation rele