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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 ≥0.05). 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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