Effect of preparation design and scan pattern on the accuracy of intraoral scans for complete arch laminate veneers under simulated intraoral variables

IF 3.2 3区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of Esthetic and Restorative Dentistry Pub Date : 2024-06-28 DOI:10.1111/jerd.13276

Nazmiye Şen DDS, PhD, Hatice Eroglu DDS

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引用次数: 0

Abstract

Purpose

The purpose of the study was to investigate the influence of different preparation designs and scan patterns on the accuracy of intraoral scans for complete-arch maxillary laminate veneers.

Materials and Methods

Three maxillary typodonts were used to obtain reference models with three different laminate veneer preparation designs: windows (W), beveled (B), and incisal overlap (IO). Reference scans were obtained with a desktop scanner. A total of 90 complete arch intraoral scans were made with an intraoral scanner (Medit i700) following three different scan patterns: straight motion (SM), zigzag motion (ZM), and combined motion (CM). Ten scans were made in each subgroup and exported as standard tessellation language (STL) files. Assessment of accuracy was conducted with a 3D software analysis program (Geomagic Control X). Each STL file was individually aligned with the reference scan using the best fit algorithm tool, and 3D differences were calculated using the root mean square (RMS) value. Two-way analysis of variance (ANOVA) followed by post hoc comparison tests were applied to analyze precision and trueness data (α = 0.05).

Results

Two-way ANOVA and post hoc comparison tests revealed significant differences among different preparation designs and scan patterns (p < 0.05). Regarding trueness, the IO when scanned with SM presented higher mean RMS than the other preparation designs (W and B) scanned with the same scanning pattern (p < 0.05). Regarding precision, the groups of W and IO presented significantly higher mean RMS than the group of B when scanned with ZM (p < 0.05).

Conclusions

Accuracy of intraoral scans for complete-arch laminate veneers was affected by different laminate veneer preparation designs and scan patterns.

Clinical Significance

Modifying scan pattern according to preparation design helps to improve scan accuracy for complete-arch laminate veneers.

Abstract Image

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在模拟口内变量下，制备设计和扫描模式对完整牙弓覆膜贴面口内扫描准确性的影响。

目的：该研究的目的是调查不同的预备设计和扫描模式对上颌全牙弓覆膜贴面口内扫描准确性的影响：使用三颗上颌典型牙获得参考模型，并采用三种不同的覆膜贴面制备设计：开窗（W）、斜面（B）和切缘重叠（IO）。参考扫描是通过台式扫描仪获得的。使用口内扫描仪（Medit i700）按照三种不同的扫描模式：直线运动（SM）、之字形运动（ZM）和组合运动（CM）共进行了 90 次完整的牙弓口内扫描。每个分组进行 10 次扫描，并导出为标准细分语言 (STL) 文件。精确度评估通过三维软件分析程序（Geomagic Control X）进行。使用最佳拟合算法工具将每个 STL 文件分别与参考扫描对齐，并使用均方根（RMS）值计算三维差异。应用双向方差分析（ANOVA）和事后比较测试来分析精度和真实度数据（α = 0.05）：结果：双向方差分析和事后比较试验显示，不同的制备设计和扫描模式之间存在显著差异（p 结论：口内扫描的精确度和真实度与制备设计和扫描模式之间存在显著差异（α = 0.05）：临床意义：临床意义：根据制备设计修改扫描模式有助于提高全牙弓覆面的扫描准确性。

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

Journal of Esthetic and Restorative Dentistry 医学-牙科与口腔外科

CiteScore

6.30

自引率

6.20%

发文量

124

审稿时长

>12 weeks

期刊介绍： The Journal of Esthetic and Restorative Dentistry (JERD) is the longest standing peer-reviewed journal devoted solely to advancing the knowledge and practice of esthetic dentistry. Its goal is to provide the very latest evidence-based information in the realm of contemporary interdisciplinary esthetic dentistry through high quality clinical papers, sound research reports and educational features. The range of topics covered in the journal includes: - Interdisciplinary esthetic concepts - Implants - Conservative adhesive restorations - Tooth Whitening - Prosthodontic materials and techniques - Dental materials - Orthodontic, periodontal and endodontic esthetics - Esthetics related research - Innovations in esthetics