Microcrack Formation After Root Canal Instrumentation

The development of rotary files and other endodontic instruments techniques have revolutionised treatment by enhancing canal preparation and producing rounder smoother canals and are constructed of nickel-titanium alloy. These instruments have two types of movements: rotary continuous and reciprocating. Continuous movements which involve torsion and flexion can lead to instrument fracture. To avoid this an alternative approach is proposed that is reciprocating movement. This literature review compares dentinal crack formation in root canal walls using stainless steel and nickel titanium rotary systems highlighting potential complications like tooth fracture and increased bacterial susceptibility due to contact between instruments and dentinal walls.