Influence of ambient temperature changes on intraoral scanning accuracy

Influence of ambient temperature changes on intraoral scanning accuracy

Different variables that decrease the accuracy of intraoral scanners (IOSs) have been identified. Ambient temperature changes can occur in the dental environment, but the impact of ambient temperature changes on intraoral scanning accuracy is unknown. The purpose of this in vitro study was to assess...

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Veröffentlicht in:The Journal of prosthetic dentistry 2023-11, Vol.130 (5), p.755-760
Hauptverfasser: Revilla-León, Marta, Gohil, Aishwa, Barmak, Abdul B., Gómez-Polo, Miguel, Pérez-Barquero, Jorge Alonso, Att, Wael, Kois, John C.
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container_issue 5
container_start_page 755
container_title The Journal of prosthetic dentistry
container_volume 130
creator Revilla-León, Marta
Gohil, Aishwa
Barmak, Abdul B.
Gómez-Polo, Miguel
Pérez-Barquero, Jorge Alonso
Att, Wael
Kois, John C.
description Different variables that decrease the accuracy of intraoral scanners (IOSs) have been identified. Ambient temperature changes can occur in the dental environment, but the impact of ambient temperature changes on intraoral scanning accuracy is unknown. The purpose of this in vitro study was to assess the impact of ambient temperature changes on the accuracy (trueness and precision) of an IOS. A complete arch maxillary dentate Type IV stone cast was obtained. Four 6-mm-diameter gauge balls were added to the maxillary cast to aid future evaluation measurements. The maxillary cast was digitized by using an industrial scanner (GOM Atos Q 3D 12M). The manufacturer’s recommendations were followed in obtaining a reference scan. Then, the maxillary cast was digitized by using an IOS (TRIOS 4) according to the scanning protocol recommended by the manufacturer. Four groups were created depending on the ambient temperature change assessed: 24 °C or room temperature (24-D or control group), 19 °C or a 5-degree temperature drop (19-D group), 15 °C or a 9-degree temperature drop (15-D group), and 29 °C or a 5-degree temperature rise (29-D group). The Shapiro-Wilk and Kolmogorov-Smirnov tests revealed that the data were not normally distributed (P
doi_str_mv 10.1016/j.prosdent.2022.01.012
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Ambient temperature changes can occur in the dental environment, but the impact of ambient temperature changes on intraoral scanning accuracy is unknown. The purpose of this in vitro study was to assess the impact of ambient temperature changes on the accuracy (trueness and precision) of an IOS. A complete arch maxillary dentate Type IV stone cast was obtained. Four 6-mm-diameter gauge balls were added to the maxillary cast to aid future evaluation measurements. The maxillary cast was digitized by using an industrial scanner (GOM Atos Q 3D 12M). The manufacturer’s recommendations were followed in obtaining a reference scan. Then, the maxillary cast was digitized by using an IOS (TRIOS 4) according to the scanning protocol recommended by the manufacturer. Four groups were created depending on the ambient temperature change assessed: 24 °C or room temperature (24-D or control group), 19 °C or a 5-degree temperature drop (19-D group), 15 °C or a 9-degree temperature drop (15-D group), and 29 °C or a 5-degree temperature rise (29-D group). The Shapiro-Wilk and Kolmogorov-Smirnov tests revealed that the data were not normally distributed (P&lt;.05). For trueness, the nonparametric Kruskal-Wallis followed by the Dwass-Steel-Critchlow-Fligner pairwise comparison tests were used. Precision analysis was obtained by using the Levene test based on the comparison of the standard deviations of the 4 groups with 95% Bonferroni confidence intervals for standard deviations (α=.05). The Kruskal-Wallis test revealed significant differences in the trueness values among all 4 groups (P&lt;.001). Furthermore, significant differences between the linear discrepancy medians between the control and 19-D groups (P&lt;.001), control and 15-D groups (P=.002), control and 29-D groups (P&lt;.001), 19-D and 29-D groups (P=.003), and 15-D and 29-D groups (P&lt;.001) were found. The Levene test for the comparison of the variances among the 4 groups did not detect a significant difference (P=1.000), indicating that precision wise the 4 groups were not significantly different from each other. Ambient temperature changes had a detrimental effect on the accuracy (trueness and precision) of the IOS tested. Ambient temperature changes significantly decreased the scanning accuracy of the IOS system tested. 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Ambient temperature changes can occur in the dental environment, but the impact of ambient temperature changes on intraoral scanning accuracy is unknown. The purpose of this in vitro study was to assess the impact of ambient temperature changes on the accuracy (trueness and precision) of an IOS. A complete arch maxillary dentate Type IV stone cast was obtained. Four 6-mm-diameter gauge balls were added to the maxillary cast to aid future evaluation measurements. The maxillary cast was digitized by using an industrial scanner (GOM Atos Q 3D 12M). The manufacturer’s recommendations were followed in obtaining a reference scan. Then, the maxillary cast was digitized by using an IOS (TRIOS 4) according to the scanning protocol recommended by the manufacturer. Four groups were created depending on the ambient temperature change assessed: 24 °C or room temperature (24-D or control group), 19 °C or a 5-degree temperature drop (19-D group), 15 °C or a 9-degree temperature drop (15-D group), and 29 °C or a 5-degree temperature rise (29-D group). The Shapiro-Wilk and Kolmogorov-Smirnov tests revealed that the data were not normally distributed (P&lt;.05). For trueness, the nonparametric Kruskal-Wallis followed by the Dwass-Steel-Critchlow-Fligner pairwise comparison tests were used. Precision analysis was obtained by using the Levene test based on the comparison of the standard deviations of the 4 groups with 95% Bonferroni confidence intervals for standard deviations (α=.05). The Kruskal-Wallis test revealed significant differences in the trueness values among all 4 groups (P&lt;.001). Furthermore, significant differences between the linear discrepancy medians between the control and 19-D groups (P&lt;.001), control and 15-D groups (P=.002), control and 29-D groups (P&lt;.001), 19-D and 29-D groups (P=.003), and 15-D and 29-D groups (P&lt;.001) were found. The Levene test for the comparison of the variances among the 4 groups did not detect a significant difference (P=1.000), indicating that precision wise the 4 groups were not significantly different from each other. Ambient temperature changes had a detrimental effect on the accuracy (trueness and precision) of the IOS tested. Ambient temperature changes significantly decreased the scanning accuracy of the IOS system tested. 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Ambient temperature changes can occur in the dental environment, but the impact of ambient temperature changes on intraoral scanning accuracy is unknown. The purpose of this in vitro study was to assess the impact of ambient temperature changes on the accuracy (trueness and precision) of an IOS. A complete arch maxillary dentate Type IV stone cast was obtained. Four 6-mm-diameter gauge balls were added to the maxillary cast to aid future evaluation measurements. The maxillary cast was digitized by using an industrial scanner (GOM Atos Q 3D 12M). The manufacturer’s recommendations were followed in obtaining a reference scan. Then, the maxillary cast was digitized by using an IOS (TRIOS 4) according to the scanning protocol recommended by the manufacturer. Four groups were created depending on the ambient temperature change assessed: 24 °C or room temperature (24-D or control group), 19 °C or a 5-degree temperature drop (19-D group), 15 °C or a 9-degree temperature drop (15-D group), and 29 °C or a 5-degree temperature rise (29-D group). The Shapiro-Wilk and Kolmogorov-Smirnov tests revealed that the data were not normally distributed (P&lt;.05). For trueness, the nonparametric Kruskal-Wallis followed by the Dwass-Steel-Critchlow-Fligner pairwise comparison tests were used. Precision analysis was obtained by using the Levene test based on the comparison of the standard deviations of the 4 groups with 95% Bonferroni confidence intervals for standard deviations (α=.05). The Kruskal-Wallis test revealed significant differences in the trueness values among all 4 groups (P&lt;.001). Furthermore, significant differences between the linear discrepancy medians between the control and 19-D groups (P&lt;.001), control and 15-D groups (P=.002), control and 29-D groups (P&lt;.001), 19-D and 29-D groups (P=.003), and 15-D and 29-D groups (P&lt;.001) were found. The Levene test for the comparison of the variances among the 4 groups did not detect a significant difference (P=1.000), indicating that precision wise the 4 groups were not significantly different from each other. Ambient temperature changes had a detrimental effect on the accuracy (trueness and precision) of the IOS tested. Ambient temperature changes significantly decreased the scanning accuracy of the IOS system tested. Increasing the ambient temperature has a greater influence on the intraoral scanning accuracy of the IOS selected when compared with decreasing the ambient temperature.</abstract><cop>United States</cop><pub>Elsevier Inc</pub><pmid>35210107</pmid><doi>10.1016/j.prosdent.2022.01.012</doi><tpages>6</tpages><orcidid>https://orcid.org/0000-0003-2854-1135</orcidid><orcidid>https://orcid.org/0000-0002-5022-7567</orcidid><orcidid>https://orcid.org/0000-0002-7067-9712</orcidid><orcidid>https://orcid.org/0000-0002-7275-0199</orcidid><orcidid>https://orcid.org/0000-0001-8614-8484</orcidid></addata></record>
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