Impact of marginal defects on the accuracy of automated finish line detection in tooth preparation.

IF 1.8 4区医学 Q2 DENTISTRY, ORAL SURGERY & MEDICINE

International Journal of Computerized Dentistry Pub Date : 2023-11-28 DOI:10.3290/j.ijcd.b3840393

Jun Hyub Park, Du-Hyeong Lee

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引用次数: 0

Abstract

Aim: The present study aimed to evaluate the accuracy of automated detection of preparation finish lines in teeth with defective margins.

Materials and methods: An extracted first molar was prepared for a full veneer crown, and marginal defects were created and scanned (discontinuity of finish line: 0.5, 1.0, and 1.5 mm; additional line angle: connected, partially connected, and disconnected). Six virtual defect models were entered into CAD software and the preparation finish line was designated by 20 clinicians (CAD-experienced group: n = 10; CAD-inexperienced group: n = 10) using the automated finish line detection method. The accuracy of automatic detection was evaluated by calculating the 3D deviation of the registered finish line. The Kruskal-Wallis and Mann-Whitney U tests were used for between-group comparisons (α = 0.05).

Results: The deviation values of the registered finish lines were significantly different according to conditions with different amounts of finish line discontinuity (P < 0.001). There was no statistical difference in the deviation of the registered finish line between models with additional line angles around the margin. Moreover, no statistical difference was found in the results between CAD-experienced and CAD-inexperienced operators.

Conclusions: The accuracy of automated finish line detection for tooth preparation can differ when the finish line is discontinuous. The presence of an additional line angle around the preparation margin and prior experience in dental CAD software do not affect the accuracy of automated finish line detection.

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牙体预备过程中边缘缺陷对自动终点线检测精度的影响。

目的:本研究的目的是评估自动检测预备终点线在牙缘缺陷的准确性。材料和方法:拔出第一磨牙制备全冠，建立边缘缺陷并扫描(终点线不连续:0.5,1.0和1.5 mm;附加线角:连接、部分连接和断开)。将6个虚拟缺陷模型输入到CAD软件中，由20名临床医生(CAD经验组:n = 10;没有cad经验组:n = 10)，采用自动终点线检测方法。通过计算注册终点线的三维偏差来评价自动检测的精度。组间比较采用Kruskal-Wallis检验和Mann-Whitney U检验(α = 0.05)。结果:不同终点线间断量条件下，注册终点线偏差值有显著差异(P < 0.001)。在注册终点线的偏差方面，在边缘周围有额外线角的模型之间没有统计学差异。此外，在有cad经验的操作员和没有cad经验的操作员之间，结果没有统计学差异。结论:当终点线不连续时，自动检测牙齿预备终点线的准确性会有所不同。在准备边缘周围存在额外的线角和牙科CAD软件的先前经验不会影响自动终点线检测的准确性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Computerized Dentistry Dentistry-Dentistry (miscellaneous)

CiteScore

2.90

自引率

0.00%

发文量

期刊介绍： This journal explores the myriad innovations in the emerging field of computerized dentistry and how to integrate them into clinical practice. The bulk of the journal is devoted to the science of computer-assisted dentistry, with research articles and clinical reports on all aspects of computer-based diagnostic and therapeutic applications, with special emphasis placed on CAD/CAM and image-processing systems. Articles also address the use of computer-based communication to support patient care, assess the quality of care, and enhance clinical decision making. The journal is presented in a bilingual format, with each issue offering three types of articles: science-based, application-based, and national society reports.