An Electromagnetic Detection Technique Research and Device Development for Osseointegration Stability in Dental Implant

• Main Authors: Ru-zhen Mou, 牟汝振
• Other Authors: Min-chun Pan
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/07114113936420381093

碩士 === 國立中央大學 === 機械工程學系 === 103 === For dental implant osseointegration detection, this study continues a non-contact electromagnetic excitation in artificial implant surgery stable detection. Electromagnetic (EM) detection is used of interactive changing current signal, which input the inductor, and produce an interactive electromagnetic force to excite structures. Then linear Hall-effect sensor detects the resonance frequency (RF) of the dental implant structure. The thesis consists of two parts. First, the principle of inductive excitation source, selection criteria, the principle of Hall-effect sensors, and the schema electromagnetic detection device are briefly introduced. Then EM device will be fed with Morlet wavelet to verify the feasibility of the electromagnetic device. The second section describes in-vitro experimental processes, and the RF results obtained from measurement will be compared with Osstell® ISQ, and capacitive displacement sensor. Natural frequency depends on stiffness, and is affected by mass. If mass increases more than stiffness, natural frequency of the 1st mode shape decreases. Therefore, although the stiffness of structural bone blocks are increased by enlarging thickness of cortical bone, the RFs decreased. Increasing the Young’s modulus of cencellous bone will increase the structural stiffness. In order to correspond the clinical condition, bone block is attached the cortical shell in Buccal Lingual (BL) direction, it can increase the stiffness of bone block. As the thickness of cortical shell increase, RF is more difficult to measure. The results show that the non-contact electromagnetic detection device is reliable, but still need improvement to make the device more compact. Moreover, in-vivo experimental of animal- tibia is required to verify the devices applied in clinical condition.