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KMID : 0362120150370040191
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Journal of Technologic Dentistry
2015 Volume.37 No. 4 p.191 ~ p.197
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Comparison of accuracy of digital data obtained by intra-oral scanner and extra-oral scanner
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이재준:Lee Jae-Jun
정일도:Jung In-Do/김총명:Kim Chong-Myeong/박진영:Park Jin-Young/김지환:Kim Ji-Hwan/김웅철:Kim Woong-Chul
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Abstract
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Purpose: The purpose of this study was to compare the accuracy of the scan data acquired by the extra-oral and intra-oral scanner.
Methods: The maxillary right first molar was made of polymethyl methacrylate(PMMA) specimen. This PMMA specimen was scanned with a engineering scanner and intra-oral scanner. Meanwhile, extra-oral scanner scanned stone die duplicated from PMMA master die. Trueness and precision of scan datas was measured by 3-dimensinal inspection. Independent t-test was conduct to analysis the significant difference(a=0.05).
Results: In the trueness analysis, mean of discrepancies were 13.82um for intra oral scanner and 16.84 um for extra-oral scanner. In the precision analysis, mean of discrepancies were 11.72 for inta-oral scanner and 9.2 for extra-oral scanner. Both trueness and precision showed a statistically significant difference (Table 1, p<0.05).
Conclusion: Intra-oral scanner can show higher trueness than extra-oral scanner, it has lower precision.
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KEYWORD
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Intra-oral scanner, 00Extra-oral scanner, Accuracy
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