应用微型ct测量技术评价种植体全弓固定义齿数字化工作流程的准确性。

IF 3.4 2区 医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE
Amira Fouda, Chris Wyatt, Anthony McCullagh, Siddharth R Vora, Nancy L Ford, Mohamed Gebril
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引用次数: 0

摘要

目的:本研究旨在利用一种新型的微ct测量技术,评估全数字化工作流程制作的全弓种植体钛框架的配合精度。材料和方法:制作了一个3d打印模型,包含四个植入物类似物。在模型上放置临时圆柱体后获得基线微ct。接下来,使用口腔内扫描仪(TRIOS 5)扫描打印模型,并使用STL文件制作10个钛框架。将每个框架放回模型上,在单螺钉测试(SST-CT)和最终拟合测试(FFT-CT)两种情况下,再进行一次micro-CT测量,并与基线进行比较。采用单螺钉试验(SST)和螺钉阻力试验(SRT)评估框架被动性。通过将10次扫描与实验室扫描STL叠加来评估口腔内扫描的准确性,以确定错位是由于扫描或铣削和设计错误造成的。结果:使用SST-CT没有一个框架被认为是可接受的,使用FFT-CT只有三个框架是可接受的。SST和SRT非被动率分别为60%和80%。叠加分析显示,只有两个用于框架制作的口内扫描落在150微米的可接受偏差范围内,这表明两个样品中扫描错误和可能的铣削或设计错误的趋势很高。结论:结果显示明显的不匹配程度。这表明全口康复的全数字化工作流程可能存在一些局限性。由于口腔内扫描技术的快速发展,需要进一步的研究来验证这些发现。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Evaluation of the accuracy of digital workflow for implant-supported full-arch fixed dental prostheses using a novel micro-CT measurement technique.

Purpose: This study aims to evaluate the accuracy of fit of full-arch implant titanium frameworks fabricated from a fully digital workflow using a novel micro-CT measurement technique.

Materials and methods: A 3D-printed model with four implant analogs was fabricated. A baseline micro-CT was obtained after placing temporary cylinders on the model. Next, the printed model was scanned with an intraoral scanner (TRIOS 5), and the STL files were used to fabricate 10 titanium frameworks. Each framework was placed back on the model, and another micro-CT was taken under two conditions: single screw test (SST-CT) and final fit test (FFT-CT), and the measurements were compared to the baseline. Framework passivity was evaluated using a single-screw test (SST) and a screw-resistance test (SRT). The accuracy of the intraoral scans was assessed by superimposing the 10 scans with a laboratory scan STL to determine if the misfit was due to scanning or milling and designing errors.

Results: None of the frameworks was deemed acceptable using SST-CT, and only three had an acceptable fit using FFT-CT. SST and SRT non-passivity rates were 60% and 80%, respectively. Superimposition analysis revealed that only two intraoral scans used for framework fabrication fell within the acceptable deviation range of 150 microns, suggesting a high tendency for scanning errors and a possible milling or designing error in two samples.

Conclusion: The results show a significant level of misfit. This suggests that the full-digital workflow for full-mouth rehabilitation can present some limitations. Due to the rapid advancement in intraoral scanning, further studies are required to validate these findings.

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来源期刊
CiteScore
7.90
自引率
15.00%
发文量
171
审稿时长
6-12 weeks
期刊介绍: The Journal of Prosthodontics promotes the advanced study and practice of prosthodontics, implant, esthetic, and reconstructive dentistry. It is the official journal of the American College of Prosthodontists, the American Dental Association-recognized voice of the Specialty of Prosthodontics. The journal publishes evidence-based original scientific articles presenting information that is relevant and useful to prosthodontists. Additionally, it publishes reports of innovative techniques, new instructional methodologies, and instructive clinical reports with an interdisciplinary flair. The journal is particularly focused on promoting the study and use of cutting-edge technology and positioning prosthodontists as the early-adopters of new technology in the dental community.
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