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KMID : 0362420050430060736
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Journal of Korean Academy of Prosthodontics
2005 Volume.43 No. 6 p.736 ~ p.744
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Correlation assessment between resonance frequency analysis and radiographic method according to peri-implant bone change
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Lee Mi-Ran
Yi Yang-Jin
Park Chan-Jin
Cho Lee-Ra
Choi Hang-Moon
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Abstract
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Statement of problem: Initial stability of implant is an important factor for predicting osseointegration. It requires a rapid, non-invasive, user-friendly technique to frequently assess the implant stability and the degree of osseointegration.
Purpose: The aim of this study was to evaluate the correlation between the resonance frequency analysis (RFA) and the radiographic method for peri-implant bone change under in vitro conditions.
Materials & Methods: Twenty implants of 3.75 mm in diameter(Neoplant, Neobiotech, Korea) were used. To simulate peri-implant bone change, 2 mm-deep 45degrees range horizontal defect and 2 mm-deep 90 degrees range horizontal defect area were serially prepared perpendicular to the X-ray beam after conventional implant insertion. Customized film holding device was fabricated to standardize the projection geometry for serial radiographs of implants and direct digital image was obtained. ISQ values and gray values inside threads were measured before and after periimplant bone defect preparation.
Results: Within a limitation of this study, ISQ value of resonance frequency analysis was changed according to peri-implant bone change (p<0.05) and gray value of radiographic method was changed according to peri-implant bone change (p<0.05). There was no correlation between the ISQ value and the gray value for peri-implant bone change (p>0.05). But, in horizontal defect condition, relatively positive correlation were between ISQ and gray values(r=0.663).
Conclusion: This results provided a possibility that peri-implant bone change may be evaluated by both RFA and radiographic method.
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KEYWORD
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Dental implant, Gray values, Radiography, resonance frequency analysis
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