“Pliers for measurable torquing in orthodontic archwires” Patent for KSU
Two Saudi dentists from the Dental University Hospital in the Medical City and the College of Dentistry at King Saud University have registered a patent with the U.S. Patent and Trademark Office for the invention of "pliers for measurable torquing in orthodontic archwires."
Dr. Hessah Alhuwaish, a researcher in the doctoral program in dental sciences (specializing in orthodontics), said that toward the end of orthodontic treatment, it is a common problem for orthodontists to find a crown that is generally properly located and tooth root or roots angled labially or buccally (toward the lips or cheeks) or lingually (toward the tongue) out of the ideal position. To correct this problem, bends or twists of certain degrees on the orthodontic wires with rectangular cross section are necessary to provide the necessary corrective force labially or lingually. She further explained that commercially available pliers (Rose Torquing Pliers, Tweed Pliers) provide unmeasurable bends and they consist of two pieces working together to create the desired third-degree torqueing.
She added that this technique is cumbersome and lacks accuracy because it is difficult to measure the bend magnitude and having a separate tool for each use (torqueing for one tooth and another for a set of teeth) in every orthodontic clinic is costly. She noted that the invention can determine the exact angle of single teeth bend in the archwire with a rectangular cross-section and determine quantify using a one-piece Plier for both uses: for a single tooth and a group of teeth using the same Plier.
She explained that this tool allows accurate determination of the required torque bends in degrees and solves the problem of missing or over bending teeth.
For his part, Professor Abdullah Al-Drees, from the Department of Pediatric Dentistry and Orthodontics, explained that the Plier consists of a pair of upper and lower grips, a pair of protractors, and two openings to contain orthodontic archwires of two different sizes (the front opening accommodates the "0,017 X 0.025" wires, and the back the size "0,019 X 0.025" to ensure a tight grip on the wire while creating a twist.
He pointed out that the two protractors are used as a reference to know the amount of torque in degrees during implementation. Furthermore, the opening of the side wing of the Plier provides the necessary flexibility to add a torque to a group of teeth, and its closure to be parallel to the fixed-wing shortens the torque to one tooth. He also explained that the Plier could be manufactured from sterilized materials, making it a practical and economical option as it can be used safely among patients.