Orthodontic Force Measurement Based On Mandible Model And Stressanalysis Of Tooth

Malocclusion not only affect oral health, it has become a block in the process of the pursuit of beauty. Currently, orthodontic treatment is the only way to cure this symptom. But the side effects, such as root absorption and dental pain, follow the orthodontic treatment. Research shows that only provide the appropriate orthodontic force to minimizing the side effects and shortening the treatment period. How to get accurate appliance orthodontic force acting on the teeth is important for clinical treatment. However, the existing research does not provide the force values that is the reaction of oral tissue. This paper will put forward a force measuring method based on a mandible physical model.Following the analysis of orthodontics and biomechanics, this paper puts forward an orthodontic force measureing method using a mandible physical model. This method, using a mandible physical model and appliances, is to simulate the interaction of tissue during the treatment. And the device, which composes of a 6-dimensional force sensor, can measure the orthodontic force.According to the above method and device, fix the mandible physical model. Adjust the position of the sensor to the target tooth of the model, and fix them together to ensure the relative position of each other. Then cut the target tooth from the model, and the separated tooth will keep the balance under the fore of the sensor and appliances. So the orthodontic force can be measured by the sensor.With the finite element method, the stress analysis of the target tooth and periodontal tissue will carry out using those force data as the load. Through the distrution of stress, the characteristics of teeth movement can be determined and doctors can get more information and higher reference value of patients. The results show that the orthodontic force measurement method and device presented in this paper has a higher practical value compared with the existing measuring methods.