EVALUATION OF THE USE OF NICKEL TITANIUM ROTARY INSTRUMENTS IN PRIMARY TEETH

Endodontic treatment is one of the major part of pediatric dentistry and recently shows alteration from hand instrumentation to rotary instruments. the major concern of hand instrumentation in primary teeth is increased root canal preparation time in young children with limited cooperation. since the introduction of rotay instruments in endodontic treatment, root canal treatment has become more simple, more secure and fast. especially in curved canals of molar teeth, rotary instruments reduce time with increased patient comfort and lower risk of flare-up. root canal preparation of primary teeth was first tried with profile and then; protaper, hero shaper and k3 rotary files were used. because of low modulus of elasticity; it can be easy to preparate narrow primary canals and protect original root canal morfology. at the same time smooth surface and conic root form can be obtained. in addition rotary instruments need highly sensitive techniques and have a increased fracture risk due to the wrong application. they are also expensive according to hand instrumentation systems. although there are many studies in permanent teeth about nickel titanium rotary files, there is a little study in primary teeth. in the present review, we evaluated single file and multiple files of the nickel titanium rotary instruments is being used until today.