Shely Asaf, Lugassy Diva, Rosner Ophir, Zanziper Eran, Nissan Joseph, Rachmiel Shir, Khoury Yara, Ben-Izhack Gil
Department of Oral Rehabilitation, The Maurice and Gabriela Goldschleger School of Dental Medicine, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel.
Department of Orthodontics, The Maurice and Gabriela Goldschleger School of Dental Medicine, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel.
J Clin Med. 2023 Oct 20;12(20):6644. doi: 10.3390/jcm12206644.
The purpose of this in vitro study was to compare the inter-implant distance, inter-implant axis, and intra-implant axis of three implants in a straight line by using a laboratory scanner (LBS) versus an intra-oral scanner (IOS) with two different intra-oral scan bodies (ISBs).
A 3D model was printed with internal hex implant analogs of three implants in positions 15#, 16#, and 17#. Two standard intra-oral scan bodies (ISBs) were used: MIS ISB (two-piece titanium) and Zirkonzhan ISB (two-piece titanium). Both ISBs were scanned using 7 Series dental wings (LBS) and 30 times using Primescan (IOS). For each scan, a stereolithography (STL) file was created and a comparison between all the scans was performed through superimposition of the STL files by using 3D analysis software (PolyWorks 2020; InnovMetric, Québec, QC, Canada). A Kolmogorov-Smirnov test was performed followed by a Mann-Whitney test ( < 0.05).
The change in inter-implant distance for the MIS ISB was significantly lower compared to the ZZ ( < 0.05). The change in intra-implant angle was significantly lower for the ZZ ISB compared to MIS ( < 0.05). The changes in inter-implant angle between the mesial and middle and between the middle and distal were significantly lower for MIS compared to ZZ in contrast to mesial to distal, which was significantly higher ( < 0.05).
Both ISBs showed differences in all the parameters between the LBS and the IOS. The geometry of the scan abutment had an impact on the inter-implant distance as the changes in the inter-implant distance were significantly lower for the MIS ISB. The changes in the intra-implant angle were significantly lower for the ZZ ISB. There is a need for further research examining the influence of geometry, material, and scan abutment parts on the trueness.
本体外研究的目的是使用实验室扫描仪（LBS）与配备两种不同口腔内扫描体（ISB）的口腔内扫描仪（IOS），比较直线排列的三颗种植体的种植体间距离、种植体间轴和种植体内轴。
用15#、16#和17#位置的三颗种植体的内六角种植体代型打印出一个三维模型。使用了两种标准的口腔内扫描体（ISB）：MIS ISB（两件式钛合金）和Zirkonzhan ISB（两件式钛合金）。两种ISB均使用7系列牙科翼片（LBS）扫描1次，并使用Primescan（IOS）扫描30次。每次扫描都会创建一个立体光刻（STL）文件，并通过使用三维分析软件（PolyWorks 2020；InnovMetric，魁北克，加拿大魁北克省）叠加STL文件来对所有扫描进行比较。进行柯尔莫哥洛夫-斯米尔诺夫检验，随后进行曼-惠特尼检验（<0.05）。
与ZZ相比，MIS ISB的种植体间距离变化显著更低（<0.05）。与MIS相比，ZZ ISB的种植体内角度变化显著更低（<0.05）。与ZZ相比，MIS在近中与中间以及中间与远中之间的种植体间角度变化显著更低，而近中到远中的变化则显著更高（<0.05）。
两种ISB在LBS和IOS之间的所有参数上均显示出差异。扫描基台的几何形状对种植体间距离有影响，因为MIS ISB的种植体间距离变化显著更低。ZZ ISB的种植体内角度变化显著更低。需要进一步研究检查几何形状、材料和扫描基台部件对准确性的影响。
