Limones Alvaro, Çakmak Gülce, Fonseca Manrique, Roccuzzo Andrea, Cobo-Vázquez Carlos, Gómez-Polo Miguel, Molinero-Mourelle Pedro
Department of Conservative Dentistry and Prosthodontics, Faculty of Dentistry, Complutense University of Madrid, Madrid, Spain; Department of Prosthodontics, School of Dentistry, Indiana University, Indianapolis, Indiana, USA.
Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland.
J Dent. 2025 Feb;153:105503. doi: 10.1016/j.jdent.2024.105503. Epub 2024 Dec 16.
To assess the impact of involuntary interruptions (simulating tracking loss by moving the scanner out of its focal distance) and voluntary interruptions (pressing the scanner's turn-on button) on the accuracy of implant-supported full-arch scans using an intraoral scanner (TRIOS 5, version 22.1.10; 3Shape; Copenhagen, Denmark).
An edentulous model with four implants was digitized with an industrial scanner (Artec Micro II; Artec 3D) to create a reference scan. Four groups (n = 30) were established based on the number of interruptions during scanning: Zero Group (no interruptions; control group), 6-V Group (six voluntary interruptions), 6-I Group (six involuntary interruptions), and 12-I Group (twelve involuntary interruptions). Primary outcome was accuracy assessed by the Root Mean Square (RMS) method. Secondary outcomes included scanning time and the number of photograms. Data were analyzed using one-way ANOVA and post hoc Tukey multiple comparison tests (α=0.05).
A total of 120 digital scans were conducted. The Zero group achieved a RMS error of 291 ± 47 µm, a scanning time of 68 ± 6s, and 1320 ± 129 photograms. 6-V group significantly reduced RMS error (MD -102 µm [IC 95 %: -141, -63]), decreased scanning time (MD -20s [IC 95 %: -25, -17]), and reduced photograms (MD -415 photograms [IC 95 %: -506, -324]) compared to the control group (P<.001). Simulations of 6 or 12 involuntary interruptions did not affect accuracy compared to the control group (P>.05).
Voluntary interruptions during scanning, achieved by pressing the scanner's turn-on button, appear to enhance accuracy due to image preprocessing, while involuntary interruptions had no significant impact on the accuracy of implant-supported full-arch scans.
Voluntary stop during scanning implant-supported full-arches may result in better-fitting prostheses owing to higher scan accuracy and efficiency.
评估非自愿中断（通过将扫描仪移出焦距模拟跟踪丢失）和自愿中断（按下扫描仪的开启按钮）对使用口腔内扫描仪（TRIOS 5，版本22.1.10；3Shape；丹麦哥本哈根）进行种植体支持的全牙弓扫描准确性的影响。
使用工业扫描仪（Artec Micro II；Artec 3D）对带有四个种植体的无牙颌模型进行数字化处理，以创建参考扫描。根据扫描过程中的中断次数建立四组（n = 30）：零组（无中断；对照组）、6 - V组（六次自愿中断）、6 - I组（六次非自愿中断）和12 - I组（十二次非自愿中断）。主要结果通过均方根（RMS）方法评估准确性。次要结果包括扫描时间和照片数量。使用单因素方差分析和事后Tukey多重比较检验（α = 0.05）分析数据。
共进行了120次数字扫描。零组的RMS误差为291±47 µm，扫描时间为68±6秒，照片数量为1320±129张。与对照组相比，6 - V组显著降低了RMS误差（MD - 102 µm [95%置信区间：- 141，- 63]），减少了扫描时间（MD - 20秒[95%置信区间：- 25，- 17]），并减少了照片数量（MD - 415张照片[95%置信区间：- 506，- 324]）（P <.001）。与对照组相比，6次或12次非自愿中断的模拟对准确性没有影响（P >.05）。
通过按下扫描仪的开启按钮实现的扫描过程中的自愿中断，由于图像预处理似乎提高了准确性，而非自愿中断对种植体支持的全牙弓扫描的准确性没有显著影响。
在扫描种植体支持的全牙弓时进行自愿停止，可能由于更高的扫描准确性和效率而导致更贴合的假体。
