KMID : 0602720180220030130
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Implantology 2018 Volume.22 No. 3 p.130 ~ p.138
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Comparison of Reproducibility of Milled Acrylic Resin and Zirconia Models for 3-unit bridge Using Three-dimensional Analysis
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Park Gang-Seok
Kim Seong-Kyun Heo Seong-Joo Koak Jai-Young Park Ji-Man Ahn Jin-Soo Seo Deog-Gyu
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Abstract
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Purpose: The objective of this study was to investigate the reproducibility of milled acrylic resin and zirconia models using three-dimensional analysis.
Material and Methods: Zirconia discs and acrylic resin blocks were milled to make models. Each model was scanned with a model scanner. The zirconia models were superimposed with other zirconia model, and the acrylic resin models were superimposed with other acrylic resin model threedimensionally. Root-mean-square (RMS) values were obtained. Distances between two superimposed models were measured. Statistical significances were tested using the Mann-Whitney U test and t-test.
Results: The RMS values of the zirconia model and the acrylic resin model were not significantly different (p ¡Ã0.05). At the premolar site, distances between the zirconia models at the upper axial and at the lower axial wall were significantly smaller than for the acrylic resin models (p <0.05). At the molar site, distance between the zirconia models at the lower axial wall was significantly smaller than for the acrylic resin models (p <0.05).
Conclusion: Although there is a difference in reproducibility between the milled acrylic resin model and the zirconia model in the localized region, no significant difference was found in the whole model.
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KEYWORD
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Zirconia , Milled acrylic resin , Three-dimensional analysis, Reproducibility
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