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- W4310945843 abstract "To evaluate the in vitro accuracy of impressions obtained with two silicone and corresponding stone models using two laboratory scanners.A master model with synthetic resin teeth with two single-unit crown preparations was created and scanned using a 12-MP scanner. Five conventional impressions of the physical model were prepared with different silicone impression systems (Zhermack and Coltene) using the double-mix technique and poured with gypsum. The impressions and stone models obtained were scanned by two extraoral scanning systems (Identica T500 Medit and S600 ARTI Zirkonzahn). All best-fit superimpositions of the teeth areas were conducted between the master model and the scans of the impressions and models obtained with the two scanners. A P < .05 significance level was considered.The Identica T500 Medit scanner showed an accuracy of 102.34 (89.67, 115.01) μm for Coltene silicone and 79.51 (67.82, 91.21) μm for Zhermack silicone, while the S600 ARTI Zirkonzhan scanner presented 110.79 (98.24, 123.33) μm and 91.91 (81.29, 102.54) μm, respectively, with significant differences between scanners for Zhermack silicone (P = .008) and for the corresponding stone models (P = .002). Zhermack silicone presented overall discrepancies lower than Coltene silicone, with statistically significant differences in both scanners analyzed (P < .001; P = .017). However, the discrepancies found were within clinically acceptable values. With the Zirkonzahn scanner, discrepancies found in the Zhermack impressions were lower than in the corresponding stone models (P < .001).The direct digitalization of silicone impressions by laboratory scanners presented comparable results to conventional techniques with stone models." @default.
- W4310945843 created "2022-12-21" @default.
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- W4310945843 date "2022-01-01" @default.
- W4310945843 modified "2023-10-18" @default.
- W4310945843 title "Accuracy of silicone impressions and stone models using two laboratory scanners: a 3D evaluation" @default.
- W4310945843 doi "https://doi.org/10.11607/ijp.8074" @default.
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- W4310945843 hasPublicationYear "2022" @default.
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