Pulp therapy is considered a main choice for treating primary teeth with pulp involvement, and pulpectomy is the best choice for root canal therapy in teeth with irreversible pulpitis or necrosis. The main objective of root canal treatment in general is the elimination of microorganisms from the canals, and this can be completed and achieved through chemo-mechanical removal of inflamed vital pulpal tissues, residual necrotic tissues, infected dentine, and any remaining debris along with root canals irrigation. Therefore, cleaning and shaping is an important step to eliminate organic debris and leading to a successful pulpectomy procedure and better prognosis.

Rotary Nickel- Titanium (Ni-Ti) was introduced into dentistry to overcome the disadvantages of the manual files. In pediatric patients, they have limited mouth opening and the longer length of adult rotary files makes it more difficult to use. That's why some rotary Ni-Ti files were specially designed and manufactured for primary teeth.