The author gives the preview of various preparation techniques except of the rotary preparation. Preparation techniques include mechanical, chemomechanical, kinetic and hydrokinetic preparation. The mechanical preparation techniques involve A.R.T.. rotary, sonic and ultrasonic preparation. The advantages and disadvantages of these techniques are discussed and documented by clinical and experimental results of the author.

        Key words: minimally invasive techniques, A.R.T., sonic, ultrasonic preparation, kinetic preparation, hydrokinetic preparationm, laser