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KMID : 1020220120120061082
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Journal of Korean Society of Dental Hygiene
2012 Volume.12 No. 6 p.1082 ~ p.1089
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Comparison of the accuracy of digital models made from white light scanner by scanning method
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Kim Ki-Baek
Lee Gyeong-Tak
Kim Jae-Hong
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Abstract
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Objectives: The aim of this study was to determine the accuracy of digitized stone models, impression materials compared to the master model and the reliability of the computer aided analysis.
Methods: A master model(500B-1, Nissin dental product, Japan) with the prepared lower full arch tooth was used. Ten vinyl polysiloxane impressions(Examix®, GC Industrial Corp, Japan) of master model were taken and type Ⅳ stone(aesthetic-base gold®, Dentona, Germany) were poured in stone models. The linear distance between the reference points were measured and analyzed on the Delcam Copycad®(Delcam plc, UK). The t-student test for paired samples was used for statistical analysis.
Results: The mean differences to master model for stone model and impression material were 0.11∼0.19mm, and 0.19∼0.29mm, respectively. There were statistical differences in dimensional accuracy for full arch impression between master model and stone model/impressions(p<.05).
Conclusions: Two different scanning methods showed clinically acceptable accuracy of full arch digital impression produced by them. These results will have to be confirmed in further clinical studies.
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KEYWORD
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accuracy, digital model, impression material, scanning method, stone model
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