Accuracy of 3D white light scanning of abutment teeth impressions: evaluation of trueness and precision
Identifieur interne : 003584 ( Ncbi/Curation ); précédent : 003583; suivant : 003585Accuracy of 3D white light scanning of abutment teeth impressions: evaluation of trueness and precision
Auteurs : Jin-Hun Jeon [Corée du Sud] ; Hae-Young Kim [Corée du Sud] ; Ji-Hwan Kim [Corée du Sud] ; Woong-Chul Kim [Corée du Sud]Source :
- The Journal of Advanced Prosthodontics [ 2005-7806 ] ; 2014.
Abstract
This study aimed to evaluate the accuracy of digitizing dental impressions of abutment teeth using a white light scanner and to compare the findings among teeth types.
To assess precision, impressions of the canine, premolar, and molar prepared to receive all-ceramic crowns were repeatedly scanned to obtain five sets of 3-D data (STL files). Point clouds were compared and error sizes were measured (n=10 per type). Next, to evaluate trueness, impressions of teeth were rotated by 10°-20° and scanned. The obtained data were compared with the first set of data for precision assessment, and the error sizes were measured (n=5 per type). The Kruskal-Wallis test was performed to evaluate precision and trueness among three teeth types, and post-hoc comparisons were performed using the Mann-Whitney U test with Bonferroni correction (α=.05).
Precision discrepancies for the canine, premolar, and molar were 3.7 µm, 3.2 µm, and 7.3 µm, respectively, indicating the poorest precision for the molar (
In respect to accuracy the molar showed the largest discrepancies compared with the canine and premolar. Digitizing of dental impressions of abutment teeth using a white light scanner was assessed to be a highly accurate method and provided discrepancy values in a clinically acceptable range. Further study is needed to improve digitizing performance of white light scanning in axial wall.
Url:
DOI: 10.4047/jap.2014.6.6.468
PubMed: 25551007
PubMed Central: 4279045
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<author><name sortKey="Jeon, Jin Hun" sort="Jeon, Jin Hun" uniqKey="Jeon J" first="Jin-Hun" last="Jeon">Jin-Hun Jeon</name>
<affiliation wicri:level="3"><nlm:aff id="A1">Department of Dental Laboratory Science and Engineering, College of Health Science, Korea University, Seoul, Republic of Korea.</nlm:aff>
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<author><name sortKey="Kim, Hae Young" sort="Kim, Hae Young" uniqKey="Kim H" first="Hae-Young" last="Kim">Hae-Young Kim</name>
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<author><name sortKey="Kim, Ji Hwan" sort="Kim, Ji Hwan" uniqKey="Kim J" first="Ji-Hwan" last="Kim">Ji-Hwan Kim</name>
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<author><name sortKey="Kim, Woong Chul" sort="Kim, Woong Chul" uniqKey="Kim W" first="Woong-Chul" last="Kim">Woong-Chul Kim</name>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Accuracy of 3D white light scanning of abutment teeth impressions: evaluation of trueness and precision</title>
<author><name sortKey="Jeon, Jin Hun" sort="Jeon, Jin Hun" uniqKey="Jeon J" first="Jin-Hun" last="Jeon">Jin-Hun Jeon</name>
<affiliation wicri:level="3"><nlm:aff id="A1">Department of Dental Laboratory Science and Engineering, College of Health Science, Korea University, Seoul, Republic of Korea.</nlm:aff>
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<author><name sortKey="Kim, Hae Young" sort="Kim, Hae Young" uniqKey="Kim H" first="Hae-Young" last="Kim">Hae-Young Kim</name>
<affiliation wicri:level="3"><nlm:aff id="A2">Department of Public Health Sciences, Graduate School & BK21+ Program in Public Health Sciences, Korea University, Seoul, Republic of Korea.</nlm:aff>
<country xml:lang="fr" wicri:curation="lc">Corée du Sud</country>
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<author><name sortKey="Kim, Ji Hwan" sort="Kim, Ji Hwan" uniqKey="Kim J" first="Ji-Hwan" last="Kim">Ji-Hwan Kim</name>
<affiliation wicri:level="3"><nlm:aff id="A1">Department of Dental Laboratory Science and Engineering, College of Health Science, Korea University, Seoul, Republic of Korea.</nlm:aff>
<country xml:lang="fr" wicri:curation="lc">Corée du Sud</country>
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<author><name sortKey="Kim, Woong Chul" sort="Kim, Woong Chul" uniqKey="Kim W" first="Woong-Chul" last="Kim">Woong-Chul Kim</name>
<affiliation wicri:level="3"><nlm:aff id="A1">Department of Dental Laboratory Science and Engineering, College of Health Science, Korea University, Seoul, Republic of Korea.</nlm:aff>
<country xml:lang="fr" wicri:curation="lc">Corée du Sud</country>
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<series><title level="j">The Journal of Advanced Prosthodontics</title>
<idno type="ISSN">2005-7806</idno>
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<imprint><date when="2014">2014</date>
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<front><div type="abstract" xml:lang="en"><sec><title>PURPOSE</title>
<p>This study aimed to evaluate the accuracy of digitizing dental impressions of abutment teeth using a white light scanner and to compare the findings among teeth types.</p>
</sec>
<sec><title>MATERIALS AND METHODS</title>
<p>To assess precision, impressions of the canine, premolar, and molar prepared to receive all-ceramic crowns were repeatedly scanned to obtain five sets of 3-D data (STL files). Point clouds were compared and error sizes were measured (n=10 per type). Next, to evaluate trueness, impressions of teeth were rotated by 10°-20° and scanned. The obtained data were compared with the first set of data for precision assessment, and the error sizes were measured (n=5 per type). The Kruskal-Wallis test was performed to evaluate precision and trueness among three teeth types, and post-hoc comparisons were performed using the Mann-Whitney U test with Bonferroni correction (α=.05).</p>
</sec>
<sec><title>RESULTS</title>
<p>Precision discrepancies for the canine, premolar, and molar were 3.7 µm, 3.2 µm, and 7.3 µm, respectively, indicating the poorest precision for the molar (<italic>P</italic>
<.001). Trueness discrepancies for teeth types were 6.2 µm, 11.2 µm, and 21.8 µm, respectively, indicating the poorest trueness for the molar (<italic>P</italic>
=.007).</p>
</sec>
<sec><title>CONCLUSION</title>
<p>In respect to accuracy the molar showed the largest discrepancies compared with the canine and premolar. Digitizing of dental impressions of abutment teeth using a white light scanner was assessed to be a highly accurate method and provided discrepancy values in a clinically acceptable range. Further study is needed to improve digitizing performance of white light scanning in axial wall.</p>
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