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Research on the Controling of Pilot Drill in Dental Implantation

Author: WangQing
Tutor: GuZhangYu
School: Fudan University
Course: Clinical Stomatology
Keywords: Dental Implant Pioneer drilling Cortical bone Cancellous bone Finite Element Brushless DC motor Hall sensor
CLC: R783.6
Type: Master's thesis
Year: 2010
Downloads: 12
Quote: 0
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Abstract

[Objective] To choose the right dental implants prepared hole depth can be avoided the mandible through-and the resulting implant exposure, the occurrence of complications such as nerve compression. Decided to dental implants prepared hole depth method is mainly dependent on imaging studies. Imaging examinations both there is a certain amount of distortion, the measurement results is also difficult to combine the practical and clinical. Pioneer drilling the initial drill dental implants prepared hole, the purpose of this study is to clear planting depth control Pioneer drilling depth drilled in the jaw, avoid mandibular penetrating, in order to provide a simple dental implants prepared hole depth practical the effect of explicit guidance. [Materials and Methods] on the basis of analysis of the Pioneer drilling works and the main technical indicators, apply ANSYS11 software build pilot drill and mandible of three-dimensional finite element model. Drilled in the jaw by simulating Pioneer drilling process, analysis pioneer drilling in cancellous bone and reaches the bone trabecular and cortical bone interface changes in the force. According to the working characteristics of the brushless DC motor and control principle, the use of the Hall sensor brushless DC motor speed monitoring role, the design of a signal comparing means to capture Pioneer drilling force changes. [Results] The three-dimensional finite element analysis, when Pioneer drilled in the jaw cutting movement, the force within cancellous bone to its arrive when there are significant changes in the bone trabecular and cortical bone interface, cutting part of the guide part anti-cutting forces, anti-cutting torque will be increased significantly. The modulus of elasticity of bone trabecular and cortical bone, Pioneer drilled in the drilling process, from the cortical bone, cancellous bone into instantaneous ROP feedback loop Hall sensor output voltage will change accordingly. The central processor to the output signal of the Hall sensor compared with the preset value can be judged force changes of the pilot drill, timely made to stop, reverse, etc. control operation. [Conclusion] through finite element analysis to verify the pilot drill to exist in the force and moment of cancellous bone and reaches the bone trabecular and cortical bone interface changes. Use of this change, the motor control device can be designed to achieve the pilot drill in the drilling process reaches the interface of the brake, can the operation of the planting prepared hole accurate measurement of the amount of available bone Mandible bed, to select the appropriate planting prepared hole depth, to avoid the occurrence of the mandible perforation complications.

Research on the Controling of Pilot Drill in Dental Implantation

Abstract

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