A novel platform for in vitro analysis of torque, forces, and three-dimensional file displacements during root canal preparations: application to ProTaper rotary files.
We proposed a new testing setup and in vitro experimental procedure allowing the analysis of the forces, torque, and file displacements during the preparation of root canals using nickel-titanium rotary endodontic files. We applied it to the preparation of 20 fresh frozen cadaveric teeth using ProTaper files (Dentsply Maillefer, Ballaigues, Switzerland), according to a clinically used sequence. During the preparations, a clinical hand motion was performed by an endodontist, and we measured the applied torque around the file axis and also the involved three-dimensional forces and 3-dimensional file displacements. Such a biomechanical procedure is useful to better understand the working conditions of the files in terms of loads and displacements. It could be used to analyze the effects of various mechanical and geometric parameters on the files' behavior and to get data for modelling purposes. Finally, it could contribute to studies aiming to improve files design in order to reduce the risks of file fractures.
Diop
Amadou
A
Equipe Biomécanique et Remodelage Osseux, Arts et Métiers ParisTech, Paris, France. amadou.diop@paris.ensam.fr
Maurel
Nathalie
N
Oiknine
Michel
M
Patoor
Etienne
E
Machtou
Pierre
P
D000369:Aged, 80 and over; D002102:Cadaver; D003762:Dental Instruments; D003799:Dental Stress Analysis / Q000295:instrumentation* / Q000379:methods*; D006801:Humans; D021621:Imaging, Three-Dimensional; D009048:Motor Skills; D009532:Nickel; D018915:Root Canal Preparation / Q000295:instrumentation*; D014025:Titanium; D019415:Torque
C040654:titanium nickelide; D009532:Nickel; D014025:Titanium