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KMID : 0362120130350010049
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Journal of Technologic Dentistry
2013 Volume.35 No. 1 p.49 ~ p.56
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Deformation Characteristics Analysis of 3-Unit Fixed Partial Dentures by Using Electronic Speckle Pattern Interferometry
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Kang Hoo-Won
Lee Chul-Min
Yang Seung-Pil
Kim Hee-Jin
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Abstract
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Purpose: The deformation characteristics induced by non-destructive stresses using piezoelectric transducer(PZT) were analyzed for 3-unit fixed partial dentures manufactured PFM, Everest(CAD/CAM) and Zirkonzahn(copy milling, MAD/MAM) by electron speckle pattern interferometery(ESPI).
Methods: The ESPI analysis after loading the restoration with PZT by applying electric voltage of 900mV at the points of 10 above the base of the prostheses.
Results: PFM and All-Ceramic Everest prostheses showed about 0.1 while that of All- Ceramic Zirkonzahn prostheses showed 0.085 , demonstrating that Zirkonzahn displaced less. For PFM and All-Ceramic Zirkonzahn prostheses, the displacements were large at just below the loading point, while generalize displacement was shown over the loading point and weak connector areas for All-Ceramic Everest prostheses.
Conclusion: We could find that the deformation characteristics induced by non-destructive stresses using PZT analyzed by ESPI were similar to the fracture strengths evaluated using universal testing machine.
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KEYWORD
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deformation characteristics, 3-unit fixed partial dentures, piezoelectric transducer (PZT), electron speckle pattern interferometery (ESPI)
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