Manual Protaper Nickel Titanium File in the Application of Teeth after Bending Root Canal Preparation

Objective To evaluate the hand Protaper nickel titanium file in the teeth after root canal preparation bending applications.Methods According to the teeth and X-bit chip 100 teeth were divided into two groups of the former single tooth root canal and the posterior bending root canal group.And then were randomly divided into nickel titanium file and K-file group,were prepared to use the crown down and step-back technique to prepare root canal,filling,X to shoot films,record results in each filling.Results Nickel titanium file and file group in the former K-single tooth root canal preparation of the obvious differences;in the tooth after root canal preparation bend in a significant difference.Conclusion The hand Protaper nickel titanium file in the teeth after bending root canal preparation has obvious advantages.