Analysis of the effects of mesh reduction of digital files on the surface area and volume accuracy of complete dentures using an intraoral scanner.

IF 1.1 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Minerva dental and oral science Pub Date : 2024-11-20 DOI:10.23736/S2724-6329.24.04898-8
Ilser Turkyilmaz, Johari Y Abdullah, Gregory N Wilkins, Sara Bernardi, Giuseppe Varvara
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Abstract

Background: The purpose of this study was to determine the accuracy of an intraoral scanner to digitally duplicate complete dentures and analyze the effects of mesh reduction of digital files on the surface area and volume accuracy of complete dentures, in vitro.

Methods: A mandibular complete denture was scanned by a desktop scanner to create a digital STL reference file (control). Fifteen identical scans were created by using an intraoral scanner and exported as STL files (test group). These 15 files were saved at 100% of the original scan resolution then reduced to 75%, 50%, 25%, and 10% of their original quality. These 75 scans were statistically analyzed by calculating The Hausdorff Distance (HD) and Dice Similarity Coefficients (DSC) to assess the variation between the mean reduced intraoral scanner files test and the control desktop scanner file and eventual inconsistencies. The volumes of the reduced mesh files were also compared with the 100% resolution intraoral mesh files to evaluate precision and trueness of the intraoral scanner.

Results: Reduced mesh files of 10%, 25%, 50%, 75% of the original scan yielded a percentage similarity average of 99.7%, indicating a very high precision value for the intraoral scanner. Also, the volumes of each associated mesh reduction slightly decreased with non-statistically significant results.

Conclusions: This study concluded that the chosen intraoral scanner for this study provided very high trueness (98.34%) and precision (99.7%), and also the volumes of reduced mesh files slightly decreased but were not statistically significant.

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使用口内扫描仪分析数字化文件网格缩小对全口义齿表面积和体积精度的影响。
背景:本研究的目的是确定口内扫描仪对全口义齿进行数字化复制的准确性,并在体外分析数字化文件的网格缩小对全口义齿表面积和体积准确性的影响:用台式扫描仪扫描下颌全口义齿,创建 STL 数字参考文件(对照)。使用口内扫描仪创建 15 个相同的扫描结果,并导出为 STL 文件(测试组)。这 15 个文件以原始扫描分辨率的 100% 保存,然后分别降低到原始质量的 75%、50%、25% 和 10%。通过计算 Hausdorff Distance (HD) 和 Dice Similarity Coefficients (DSC),对这 75 个扫描文件进行了统计分析,以评估口内扫描仪测试文件和对照桌面扫描仪文件平均缩减后的差异以及最终的不一致性。还将缩小的网格文件的体积与 100%分辨率的口腔内网格文件进行了比较,以评估口腔内扫描仪的精确度和真实度:结果:原始扫描结果的 10%、25%、50%、75% 的缩小网格文件平均相似度为 99.7%,表明口内扫描仪的精度值非常高。此外,每次相关网片缩小的体积都略有减少,但结果无统计学意义:本研究的结论是,本研究选择的口腔内扫描仪提供了非常高的真实度(98.34%)和精确度(99.7%),同时缩小的网状文件体积略有减少,但在统计学上并不显著。
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来源期刊
Minerva dental and oral science
Minerva dental and oral science DENTISTRY, ORAL SURGERY & MEDICINE-
CiteScore
2.50
自引率
5.00%
发文量
61
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