DNA polymorphism 1 Dental Instruments 1 Endodontics 1 Equipment Design 1 Humans 1 In Vitro Techniques 1 Incisor 1 Micro-computed tomography 1 Oval canals Root Canal Preparation 1 Root canal preparation 1 X-Ray Microtomography 1 analysis of variance 1 anatomy 1 article 1 clinical article 1 comparative study 1 dental device 1 devices 1 endodontics 1 equipment design 1 female 1 human 1 in vitro study 1 incisor 1 kinematics 1 mandible 1 micro-computed tomography 1 motion 1 root canal preparation 1