A vibratory device to accelerate orthodontic tooth movement

Background and aim: Several approaches have been proposed to accelerate orthodontic tooth movements. One of these technologies is vibrating devices, including the Acceledent device. In this research project, a device similar to the Acceledent device has been designed and fabricated. The therapeutic goal of this device is to promote of orthodontic tooth movement by produce determined vibrations. Methods: This device consists of the following components: 1- electronic circuit board 2- the body 3- the oral piece 4- the engine and crank wheel 5- rechargeable battery 6- PID control algorithm (proportional-integralderivative) which calculates the error rate by controlling the output and input values of the process, and corrects the motion and vibration values of the system by sending a signal. Results: In this device, there is a mechanical vibrations with a frequency of 30 Hz and a force of 0.25 N which the patient will use it for 20 minutes daily. These mechanical vibrations are transmitted to the patient through an oral piece. Garter spring as the interface between the oral piece and the body of the device is responsible for transmitting the vibration from the body to the oral piece. The crankshaft attaching to the electromotor produces the vibration by centrifugal rotation. The PTC Creo 6.0 software was used to designing the body, and 3D printing technology to fabricating the body. Conclusion: Th whole process of design and prototype production of the Acceledent device were performed during two years. Laboratory evaluations indicated a frequency and a force of the device equal to 30 Hz and 0.25 N, respectively.