| Summary: | 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.
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