Department of Oral Rehabilitation, The Maurice and Gabriela Goldschleger School of Dental Medicine, Faculty of Medical and Health Sciences, Tel Aviv University, Tel Aviv, 6997801, Israel.
Department of Orthodontics, The Maurice and Gabriela Goldschleger School of Dental Medicine, Faculty of Medical and Health Sciences, Tel Aviv University, Tel Aviv, 6997801, Israel.
BMC Oral Health. 2024 Aug 1;24(1):870. doi: 10.1186/s12903-024-04664-1.
The purpose of this pilot in-vitro study was to assess the effect of sterilization on the intra-implant axis, inter-implant axis, intra-implant distance and inter-implant distance of three implants in a straight line by using laboratory scanner (LBS) versus intra-oral scanner (IOS) with intra-oral scan bodies (ISB).
A printed 3D model with three internal hex analogs in the positions 15#,16#,17# was used. Zirkonzhan (ZZ) intra-oral scan body (ISB), two-piece titanium was used. The ZZ ISBs were scanned by 7 Series dental wings (LBS) and 30 times by Primescan (IOS) pre sterilization and 30 times post sterilization. For each scan (pre and post) stereolithography (STL) file was created and a comparison between all the scans pre sterilization and post sterilization were superimposed on the laboratory scan by using a 3D analyzing software. A Kolmogorov-Smirnov test performed followed by Wilcoxon Signed Ranks tests. (p < 0.05) Results: Post sterilization of the ZZ ISB, the mean errors were significantly increased for the inter-implant distances (p < 0.0005), intra-implant distances 1,2,3 (p < 0.0005), intra-implant axis 1,3 (p < 0.0005) and inter-implant axes 13,23 (p < 0.05). In contrast, the mean errors for intra-implant axis 2 (p < 0.0005) and inter-implant axis 12 (p < 0.0005) were significantly reduced.
ZZ ISB showed changes in all four parameters after sterilization. The middle ISB had the largest changes in mean error regarding all four parameters. Sterilization process may affect the three-dimensional (3D) structure of the ZZ ISB after three cycles. There is a lack in the literature in this field and there is a need for further studies to explore the effect of sterilization (multiple cycles) on different ISBs and for creating an approved guidelines regarding the amount of sterilization for each ISB in the industry.
本体外试验研究的目的是评估使用实验室扫描仪（LBS）与口腔内扫描仪（IOS）配合口腔内扫描体（ISB）对三条直线植入物的植入体轴内、植入体轴间、植入体间距离和植入体间距离的消毒效果。
使用带有三个内部六角模拟体的打印 3D 模型，位置为 15#、16#、17#。采用 Zirkonzhan（ZZ）口腔内扫描体（ISB），两部分钛。在消毒前和消毒后，分别用 7 系列牙科 Wings（LBS）扫描 ZZ ISB 30 次和 Primescan（IOS）扫描 30 次。为每个扫描（消毒前和消毒后）创建立体光刻（STL）文件，并使用 3D 分析软件将所有扫描消毒前和消毒后的文件叠加在实验室扫描上。进行柯尔莫哥洛夫-斯米尔诺夫检验，然后进行 Wilcoxon 符号秩检验。（p<0.05）结果：ZZ ISB 消毒后，植入体间距离（p<0.0005）、植入体 1、2、3 距离（p<0.0005）、植入体轴 1、3（p<0.0005）和植入体轴 13、23（p<0.05）的平均误差显著增加。相比之下，植入体轴 2（p<0.0005）和植入体轴 12（p<0.0005）的平均误差显著降低。
ZZ ISB 消毒后四个参数均发生变化。中间 ISB 四个参数的平均误差变化最大。经过三个循环，消毒过程可能会影响 ZZ ISB 的三维（3D）结构。该领域文献不足，需要进一步研究探索不同 ISB 的消毒（多次循环）对其的影响，并为行业内每个 ISB 的消毒次数制定批准指南。
