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KMID : 1023420120120060617
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Journal of Dental Hygiene Science
2012 Volume.12 No. 6 p.617 ~ p.623
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The Influence of Different Gypsum Materials on the Accuracy from Complete Arch Digital Impression
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Kim Ki-Baek
Lee Gyeong-Tak
Kim Hea-Young
Kim Jae-Hong
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Abstract
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This study was performed to measure the accuracy of different gypsum materials by a white light dental scanner. A master model with the prepared lower full arch tooth was used. The type IV and scannable stone were used for 20 stone casts (10 casts each) duplicated a master model of mandible. The distance between the reference points were measured and analyzed by the Delcam Copycad(R) (Delcam Plc, UK) 3D graphic software. The t-student test for paired samples were used for statistical analysis. The mean differences to master model for type IV stone and scannable stone model were 0.29∼0.56 mm, and 0.17∼0.35 mm, respectively. There were statistical differences in dimensional accuracy for full arch impression between the master model and type IV/scannable stone (p＜0.05). Two different gypsum materials showed clinically acceptable accuracies of full arch digital impression produced by them. Besides, in both gypsum materials, the differences to the master model detected appear to provide enough accuracy for clinical application.
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KEYWORD
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Artificial dental stone, Dental digital impression, Dimensional measurement accuracy, Scanner
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