Department of Biomedical, Surgical and Dental Sciences, Università degli Studi di Milano, Milano, Italy.
IRCCS Istituto Ortopedico Galeazzi, Milan, Italy.
Clin Implant Dent Relat Res. 2024 Feb;26(1):237-244. doi: 10.1111/cid.13292. Epub 2023 Nov 15.
Full-arch IOS scan of edentulous areas rehabilitated with dental implants is nowadays still described as an unpredictable procedure. To improve the accuracy, a universal scan template (UST®) is proposed in this article. The clinician can easily assemble the template with a mechanical coupling, by matching the scan bodies with objects of known dimension characterized by specific markers. The UST® facilitates the scanning of an entire arch on scan bodies, reducing the learning curve, simplifying acquisition movements, shortening the scanning time, and drastically reducing the risk of distortions and aberrations of the scans.
In a case series study on 12 patients, the improvement in the accuracy of the scans with UST® was validated by comparing the STL files derived from scans with and without the guide in place. A titanium bar was produced from each optical impression.
The bars obtained from the optical impressions taken without UST® were found to be nonpassive in the mouth in the majority of the cases. On the contrary with the use of UST® we obtained 12 passive prosthetic rehabilitations.
The proposed solution may represent a valid method to improve the predictability of full arch optical impressions on implants.
目前，对用种植牙修复的无牙颌区域进行全颌 IOS 扫描仍被描述为一项不可预测的操作。为了提高准确性，本文提出了一种通用扫描模板（UST®）。临床医生可以通过将扫描体与具有特定标记的已知尺寸的物体匹配，轻松地用机械耦合组装模板。UST® 便于在扫描体上扫描整个牙弓，减少学习曲线，简化采集动作，缩短扫描时间，并大大降低扫描失真和偏差的风险。
在一项针对 12 名患者的病例系列研究中，通过比较有和无引导的扫描获得的 STL 文件来验证 UST® 对扫描准确性的改善。从每个光学印模中制作出一根钛棒。
在大多数情况下，从没有使用 UST® 的光学印模获得的棒在口腔中被发现是非被动的。相反，使用 UST® 我们获得了 12 个被动的修复体。
所提出的解决方案可能是一种提高种植体全颌光学印模可预测性的有效方法。
