Name: measuring the complete-arch distortion of an optical dental impression
Uploaded: 2019-05-30T13:00:00
Description: Watch this Scientific Journal Video about Measuring the Complete-arch Distortion of an Optical Dental Impression at JoVE.com

这项研究得到了韩国卫生技术研发项目资助,该项目由韩国卫生与福利部资助(赠款号:HI18C0435)。

1. 主试样制备
<ol><li>
模型准备
	<ol>
<li>取下颌面完整拱形模型上的人造牙齿(左、右母条、第二前摩尔和第二摩尔),仅剩1/5的颈椎部分。</li>
	</ol>
</li>
	<li>
CAD 设计
	<ol>
<li>使用参考扫描仪获取主试样的数据。</li>
		<li>使用逆向工程软件在修剪的六齿顶部设计气缸(顶部直径为 2 mm,气缸高度为 7 mm)。</li>
		<li>在左二摩尔添加三个参考球体(直径 3.5 mm),以便从反向工程软件定义?...

<ol>
	<li>McLean, J. W., von Fraunhofer, J. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+estimation+of+cement+film+thickness+by+an+in+vivo+technique.">The estimation of cement film thickness by an in vivo technique.</a> British Dental Journal. 131 (3), 107-111 (1971).</li><li>Park, J. M., Hong, Y. S., Park, E. J., Heo, S. J., Oh, N. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Clinical+evaluations+of+cast+gold+alloy,+machinable+zirconia,+and+semiprecious+alloy+crowns:+A+multicenter+study.">Clinical evaluations of cast gold alloy, machinable zirconia, and semiprecious alloy crowns: A multicenter study.</a> Journal of Prosthetic Dentistry. 115 (6), 684-691 (2016).</li><li>Keul, C., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Fit+of+4-unit+FDPs+made+of+zirconia+and+CoCr-alloy+after+chairside+and+labside+digitalization--a+laboratory+study.">Fit of 4-unit FDPs made of zirconia and CoCr-alloy after chairside and labside digitalization--a laboratory study.</a> Dental Materials. 30 (4), 400-407 (2014).</li><li>Ritter, L., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Accuracy+of+chairside-milled+CAD/CAM+drill+guides+for+dental+implants.">Accuracy of chairside-milled CAD/CAM drill guides for dental implants.</a> International Journal of Computerized Dentistry. 17 (2), 115-124 (2014).</li><li>Grunheid, T., McCarthy, S. 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Y. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Comparison+of+digital+intraoral+scanner+reproducibility+and+image+trueness+considering+repetitive+experience.">Comparison of digital intraoral scanner reproducibility and image trueness considering repetitive experience.</a> Journal of Prosthetic Dentistry. 119 (2), 225-232 (2018).</li><li>Muhlemann, S., Greter, E. A., Park, J. M., Hammerle, C. H. F., Thoma, D. 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I. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Digital+technique+for+in+vivo+assessment+of+internal+and+marginal+fit+of+fixed+dental+prostheses.">Digital technique for in vivo assessment of internal and marginal fit of fixed dental prostheses.</a> Journal of Prosthetic Dentistry. 118 (4), 452-454 (2017).</li><li>Ender, A., Zimmermann, M., Attin, T., Mehl, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=In+vivo+precision+of+conventional+and+digital+methods+for+obtaining+quadrant+dental+impressions.">In vivo precision of conventional and digital methods for obtaining quadrant dental impressions.</a> Clinical Oral Investigations. 20 (7), 1495-1504 (2016).</li><li>Kim, R. J., Park, J. M., Shim, J. S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Accuracy+of+9+intraoral+scanners+for+complete-arch+image+acquisition:+A+qualitative+and+quantitative+evaluation.">Accuracy of 9 intraoral scanners for complete-arch image acquisition: A qualitative and quantitative evaluation.</a> Journal of Prosthetic Dentistry. 120 (6), 895-903 (2018).</li><li>Ender, A., Mehl, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Accuracy+in+dental+medicine,+a+new+way+to+measure+trueness+and+precision.">Accuracy in dental medicine, a new way to measure trueness and precision.</a> Journal of Visualized Experiments. (86), e51374 (2014).</li><li>Ender, A., Mehl, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=In-vitro+evaluation+of+the+accuracy+of+conventional+and+digital+methods+of+obtaining+full-arch+dental+impressions.">In-vitro evaluation of the accuracy of conventional and digital methods of obtaining full-arch dental impressions.</a> Quintessence International. 46 (1), 9-17 (2015).</li><li>Ajioka, H., Kihara, H., Odaira, C., Kobayashi, T., Kondo, H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Examination+of+the+Position+Accuracy+of+Implant+Abutments+Reproduced+by+Intra-Oral+Optical+Impression.">Examination of the Position Accuracy of Implant Abutments Reproduced by Intra-Oral Optical Impression.</a> PLOS ONE. 11 (10), e0164048 (2016).</li><li>Patzelt, S. B., Lamprinos, C., Stampf, S., Att, W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+time+efficiency+of+intraoral+scanners:+an+in+vitro+comparative+study.">The time efficiency of intraoral scanners: an in vitro comparative study.</a> Journal of Americal Dental Association. 145 (6), 542-551 (2014).</li><li>Gan, N., Xiong, Y., Jiao, T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Accuracy+of+Intraoral+Digital+Impressions+for+Whole+Upper+Jaws,+Including+Full+Dentitions+and+Palatal+Soft+Tissues.">Accuracy of Intraoral Digital Impressions for Whole Upper Jaws, Including Full Dentitions and Palatal Soft Tissues.</a> PLOS ONE. 11 (7), e0158800 (2016).</li><li>Rehmann, P., Sichwardt, V., Wostmann, B. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Intraoral+Scanning+Systems:+Need+for+Maintenance.">Intraoral Scanning Systems: Need for Maintenance.</a> International Journal of Prosthodontics. 30 (1), 27-29 (2017).</li><li>Patzelt, S. B., Emmanouilidi, A., Stampf, S., Strub, J. R., Att, W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Accuracy+of+full-arch+scans+using+intraoral+scanners.">Accuracy of full-arch scans using intraoral scanners.</a> Clinical Oral Investigations. 18 (6), 1687-1694 (2014).</li><li>Muallah, J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Accuracy+of+full-arch+scans+using+intraoral+and+extraoral+scanners:+an+in+vitro+study+using+a+new+method+of+evaluation.">Accuracy of full-arch scans using intraoral and extraoral scanners: an in vitro study using a new method of evaluation.</a> International Journal of Computerized Dentistry. 20 (2), 151-164 (2017).</li><li>Treesh, J. C., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Complete-arch+accuracy+of+intraoral+scanners.">Complete-arch accuracy of intraoral scanners.</a> Journal of Prosthetic Dentistry. 120 (3), 382-388 (2018).</li><li>Patzelt, S. B., Vonau, S., Stampf, S., Att, W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Assessing+the+feasibility+and+accuracy+of+digitizing+edentulous+jaws.">Assessing the feasibility and accuracy of digitizing edentulous jaws.</a> Journal of Americal Dental Association. 144 (8), 914-920 (2013).</li><li>Andriessen, F. S., Rijkens, D. R., van der Meer, W. J., Wismeijer, D. 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在通过评估由此产生的数字印图体来评估口腔内扫描仪准确性的研究中,最常见的方法是在参考图像上叠加数字印象数据并计算壳对壳偏差12 ,13,14,15,20,23。但是,此方法仅限于计算与配对数据的偏差值或通过颜色映射定性地评估分布。在一项通过选择?...

在传统的牙科治疗过程中,固定修复或可拆卸假牙是在石膏制成的模型上,并浸入硅胶或不可逆的氢胶材料。由于间接制造的假肢是在口腔中交付的,因此已经做了大量的研究来克服一系列此类制造工艺1、2的错误。最近,一种数字方法被用来通过CAD过程来制造假肢,在获取3D图像后,在虚拟空间中操作模型,而不是给人留下印象3。在早期,这种光学印模方法在有限的范围内使用,例如对一颗或少量牙齿进行牙科治疗。然而,随着3D扫描仪基础技术的开发,整个拱门的数字印象现在被用于制造大规模固定修复,可拆卸的修复,如部分或全假牙,正畸器具,和植入手术指南4,5,6,7。在短区域(如单边拱门)中,数字印象的准确性令人满意。然而,由于口腔内扫描仪是一种手持式设备,通过将通过狭窄的光学窗口获得的图像拼接在一起来完成整个凹痕,因此在完成 U 形牙科拱后可以看到模型的失真。因此,在这个型号上制成的大范围设备可能不适合病人的口腔,需要很大的调整。
已经报道了各种关于使用口腔内扫描仪获得的虚拟印象体精度的研究,并且有各种研究模型和测量方法。根据研究课题,可分为临床研究8、9、10、11、12、12、体外研究13、14 ,15,16在模型单独生产研究。临床研究的优点是能够评估实际临床环境的条件,但很难控制变量并无限期地增加临床病例数。临床研究的数量并不大,因为能够评估所需的变量是有限度的。另一方面,许多通过控制变量来评估口腔内扫描仪基本性能的体外研究已经报告17。研究模型还包括部分或完整的自然牙齿拱18,19,20,21,22和一个完全凹陷的下颚与所有牙齿失去23,或牙种植体在一定间隔24、25、26、27处安装并间隔的情况,或大部分牙齿保留且仅部分牙齿的形态。牙齿失踪16,28。然而,手持式口腔内扫描仪对虚拟印象体变形的研究仅限于通过将虚拟印象体与参考数据叠加并表示为一个数字而创建的颜色映射对偏差进行定性评估。每个数据的值。很难准确测量完整拱形的 3D 失真,因为大多数研究只检查具有非定向距离偏差的牙科拱门的局部部分。
本研究使用带有坐标系的标准模型,研究了口腔内扫描仪在光学印象过程中牙拱的变形。本研究的目的是提供一种评估口腔内扫描仪精度性能的方法,该扫描仪通过光学硬件和处理软件的差异表现出各种特性。

<table>
	<tbody>
		<tr>
			<td>EOS CobaltChrome SP2</td>
			<td>Electro Oprical Systems</td>
			<td>H051601</td>
			<td>Powder type metal alloy for 3D printing</td>
		</tr>
		<tr>
			<td>Geomagic Verify</td>
			<td>3D Systems</td>
			<td>2015.2.0</td>
			<td>3D inspection software</td>
		</tr>
		<tr>
			<td>Prosthetic Restoration Jaw Model</td>
			<td>Nissin Dental Products Inc.</td>
			<td></td>
			<td>Mandibular complete-arch model</td>
		</tr>
		<tr>
			<td>Rapidform</td>
			<td>Inus technology</td>
			<td>RF90600-10004-010000</td>
			<td>Reverse engineering software</td>
		</tr>
		<tr>
			<td>stereoSCAN R8</td>
			<td>AICON 3D Systems GmbH</td>
			<td></td>
			<td>Industrial-level model scanner</td>
		</tr>
	</tbody>
</table>

measuring the complete-arch distortion of an optical dental impression

自从牙医开始通过使用口腔内扫描仪获取 3D 图像来制作数字图像以来,数字工作流程一直积极用于制作牙科修复或口腔器具。由于扫描患者口腔内口腔的性质,口腔内扫描仪是一种手持设备,带有一个小光学窗口,将小数据拼接在一起,完成整个图像。在完整的印记过程中,印象体可能发生变形,并影响修复或装置的配合。为了测量这些变形,使用金属 3D 打印机设计和生产了主试样。设计的参考几何体允许为每个印图设置独立的坐标系,并测量圆柱顶圆中心的 x、y 和z位移,并评估印图的变形。 为了评价该方法的可靠性,计算了圆柱体的坐标值,比较了原始计算机辅助设计(CAD)数据与工业扫描仪获取的参考数据。两组之间的坐标差大多小于50μm,但由于3D打印在摩尔上倾斜设计的圆柱体的z坐标中的公差,偏差很高。但是,由于打印模型设置了新标准,因此不会影响测试评估的结果。参考扫描仪的可重复性为11.0~1.8 μm。此测试方法可用于识别和改进口腔内扫描仪的内在问题,或通过测量完整拱形数字印象的每个部分的失真程度来建立扫描策略。

根据最初设计的CAD数据计算出的每个圆柱体的坐标和工业级模型扫描仪扫描的3D打印金属主样本的参考扫描图像,如表1所示。两者之间的差异显示值低于 50 μm,但 3D 打印主试样中右侧第二摩尔圆柱体的z坐标值较低。虽然金属幻象是由高端工业3D打印机生产的,但发现一个圆柱体的高度有细微差异。当设计使用CAD软件时,金属幻象被用作参考,用各种测试的口?...

Watch this Scientific Journal Video about Measuring the Complete-arch Distortion of an Optical Dental Impression at JoVE.com

Measuring the Complete-arch Distortion of an Optical Dental Impression

测量光学牙科印象的完整拱形失真

在这里,我们提出一个协议,用于测量从带有标准几何形状的 3D 打印金属幻象的口腔内扫描仪获得的竞争拱形数字印象的每个部分的失真程度。

Digital workflows have actively been used to produce dental restorations or oral appliances since dentists started to make digital impressions by ...

口腔内扫描仪在他们为牙科过程收集的数据中引入拱形失真。我们的坐标系提取协议为评估市场上的口腔内扫描仪提供了一个工具。最重要的是使用反向工程参考球体从口腔内扫描的任意坐标转换为新创建的坐标系。一种分析 x、y 和 z 方向牙科拱门关键部分变形的技术。这是一个改进，比当前方法使用最佳拟合对齐。演示这个程序的将是丹杨金，一个技术员从我们的实验室。使用物理模型创建主试样。对于此协议，准备一个曼迪贝拉尔完整的拱形模型。首先去除犬类、第二个前摩尔和第二个摩尔用于研究。将模型到参考扫描仪获取生成计算机模型所需的数据。接下来，将主样本数据上传到计算机辅助设计程序。使用逆向工程软件，在修剪过的牙齿上设计圆柱体，每个圆柱体半径为两毫米，高度为七毫米。设计左二摩尔的圆柱体，以便它以地中海方式倾斜30度，将圆柱体倾斜到右二摩尔，以便其倾斜30度。要定义坐标系，请将三个 3.5 毫米参考球体后部添加到左二摩尔圆柱体，在水桶侧添加一个球体。在金属 3D 打印机中使用此设计来制造钴铬合金幻象模型，作为患者的齿。使用金属幻像返回工业模型扫描仪。使用它获取幻像的参考扫描。下一步是设置使用口腔内扫描仪扫描的幻像，准备就绪时，使用正在测试的口腔内扫描仪扫描幻像。接下来，在 CAD 软件中，使用参考扫描数据创建幻像模型。要开始确定参考坐标，请选择参考几何，然后创建"球体"以选择"选取边界点"命令。在参考球体上选择尽可能相距尽可能远的四个点。单击"完成"以结束点选择。球体的中心将自动确定。对每个球体重复此项。接下来选择参考几何、创建、平面和选取点，以连接三个球体的中心以定义平面。将此平面标记为 XY 平面。然后通过"参考几何、创建、平面、偏移面"创建切线平面。将它放在 XY 平面上方。再次选择"参考几何"，然后选择"创建"和"平面"以到达"拾取点"命令，并在创建的点和语言球体的中心之间生成平面。转到"检查"下，然后转到"尺寸"，并使用"线性"命令测量平面与水桶球中心之间的距离。使用几何，后跟"创建"和"平面"，选择"偏移平面"以创建穿过水桶球体中点的平行平面。将此平面标记为 YZ 平面。水桶球的中心将是坐标系的原点。将一条平行于连接其余两个球体的线的线作为 Y 轴分配。在 XY 平面上分配穿过原点且垂直于 Y 轴的线作为 X 轴。使用参考几何、创建、坐标和"选取原点 X，Y 方向"命令创建新坐标系。将垂直于 XY 平面的线标注，并通过原点作为 Z 轴。继续选择"参考几何"和"绑定到命令行管理程序"以修复在扫描数据顶部创建的几何形状。然后，在"参考几何"、"变换"和"坐标"下，找到"对齐坐标"命令以过渡到新创建的坐标系。请注意，坐标指示器现在与一个水球球体重合。现在，专注于图像中的六个圆柱体之一。转到"参考几何"、创建"曲面"，"圆柱"和"选取边界点"命令。在圆柱体的顶部边界上指定至少十个点。指定椭圆上的相同点数，以查找齿与圆柱体底部的点。单击"完成"以结束点选择。获取圆柱体顶部中心的提取坐标，以便与口腔内扫描仪中的坐标值进行比较。下面是 CAD 和 3D 打印模型。CAD 图像具有用于比较的站点的标签。两个模型之间这些站点的坐标差异表明，CAD 设计的坐标不能用作参考，必须使用工业级扫描仪。最重要的是使用反向工程参考球体从口腔内扫描的原始坐标转换为新创建的坐标系。由于使用了相同类型的数据，因此可以通过 3D 分析软件中的宏函数自动执行此过程，以重复每个反向工程步骤。这创造了一种准确的方法来分析拱形失真，但可以抵抗水桶距离颜色协调的最大弱点，并可用作 ISO 标准或测试方法。

Research

JoVE Journal

Engineering

Construction and Testing of Coin Cells of Lithium Ion Batteries

钮扣电池锂离子电池的建设和测试

Rechargeable lithium ion batteries have wide applications in electronics, where customers always demand more capacity and longer lifetime.  Lithium ion ...

科研

工程学

Fabricating Metamaterials Using the Fiber Drawing Method

制造超材料使用光纤拉丝法

Metamaterials are man-made composite materials, fabricated by assembling components much smaller than the wavelength at which they operate 1. They owe ...

Optical Trapping of Nanoparticles

纳米粒子的光学捕获

Optical trapping is a technique for immobilizing and manipulating small objects in a gentle way using light, and it has been widely applied in trapping ...

Analyzing the Movement of the Nauplius 'Artemia salina' by Optical Tracking of Plasmonic Nanoparticles

Analyzing the Movement of the Nauplius 'Artemia salina' by Optical Tracking of Plasmonic Nanoparticles

分析无节幼体的运动“<em&gt;卤虫</em&gt;&#39;由电浆纳米粒子的光学跟踪

We demonstrate how optical tweezers may provide a sensitive tool to analyze the fluidic vibrations generated by the movement of small aquatic organisms. A ...

Convergent Polishing: A Simple, Rapid, Full Aperture Polishing Process of High Quality Optical Flats &amp; Spheres

Convergent Polishing: A Simple, Rapid, Full Aperture Polishing Process of High Quality Optical Flats & Spheres

收敛抛光：高品质光学平面与球的一种简单，快速，全口径抛光工艺

Convergent Polishing is a novel polishing system and method for finishing flat and spherical glass optics in which a workpiece, independent of its initial ...

Patterning via Optical Saturable Transitions - Fabrication and Characterization

通过光学吸收跃迁图案 - 制备与表征

This protocol describes the fabrication and characterization of nanostructures using a novel nanolithographic technique called Patterning via Optical ...

Experiments on Ultrasonic Lubrication Using a Piezoelectrically-assisted Tribometer and Optical Profilometer

使用超声波润滑实验一压电辅助摩擦试验机和光学轮廓

Friction and wear are detrimental to engineered systems. Ultrasonic lubrication is achieved when the interface between two sliding surfaces is vibrated at ...

Measuring the Densities of Aqueous Glasses at Cryogenic Temperatures

在低温下测量水性玻璃的密度

We demonstrate a method for determining the vitreous phase cryogenic temperature densities of aqueous mixtures, and other samples that require rapid ...

Microfluidic Imaging Flow Cytometry by Asymmetric-detection Time-stretch Optical Microscopy (ATOM)

Microfluidic Imaging Flow Cytometry by Asymmetric-detection Time-stretch Optical Microscopy ATOM

微流控成像流式细胞仪通过不对称检测时间延伸光学显微镜（ATOM）

Scaling the number of measurable parameters, which allows for multidimensional data analysis and thus higher-confidence statistical results, has been the ...

Design and Fabrication of an Optical Fiber Made of Water

一种水上光纤的设计与制造

In this report, an optical fiber of which the core is made solely of water, while the cladding is air, is designed and manufactured. In contrast with ...