The Effect of Autoclave Sterilization on the Cutting Efficiency and Cleaning Ability of Two Different Nickel Titanium Rotary Systems. (An In Vitro Study)

Abstract

One of the most important factors in the success of root canal treatment is the removal of microorganisms by biomechanical instrumentation of the canal system. This includes the removal of infected dentine and organic tissue by shaping and dissolution.

Objectives of cleaning and shaping root canal is to clean the root canal system within the mechanical limits of the instruments available and within the limits of the natural configuration of the canal space , to maintain the natural apical architecture (retention form & resistance form) , to shape the root canal system above the apical region of the root so that a proper filling material can be placed and, thereby, seal the root canal system .

The cleaning and shaping ability of root canal instruments is determined by a complex interrelationship of parameters such as cross-sectional design and the ability to remove debris and the smear layer.

Traditionally, the shaping of root canal was achieved by the use of stainless steel hand files. However, nickel titanium (Ni-Ti) instruments offer many advantage over conventional files. They are flexible, have increased cutting efficiency and have improved tine efficiency, also maintai