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首页> 外文期刊>The Journal of Prosthetic Dentistry >Comparison of 3D displacements of screw-retained zirconia implant crowns into implants with different internal connections with respect to screw tightening
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Comparison of 3D displacements of screw-retained zirconia implant crowns into implants with different internal connections with respect to screw tightening

机译：将螺旋保留氧化锆植入冠的3D位移与不同内部连接的植入物相对于螺钉拧紧的比较

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Abstract Statement of problem Internal conical implant-abutment connections without horizontal platforms may lead to crown displacement during screw tightening and torque application. This displacement may affect the proximal contacts and occlusion of the definitive prosthesis. Purpose The purpose of this in?vitro study was to evaluate the displacement of custom screw-retained zirconia single crowns into a recently introduced internal conical seal implant-abutment connection in 3D during hand and torque driver screw tightening. Material and methods Stereolithic acrylic resin models were printed using computed tomography data from a patient missing the maxillary right central incisor. Two different internal connection implant systems (both ～11.5 mm) were placed in the edentulous site in each model using a surgical guide. Five screw-retained single zirconia computer-aided design and computer-aided manufacturing (CAD-CAM) crowns were fabricated for each system. A pair of high-resolution digital cameras was used to record the relationship of the crown to the model. The crowns were tightened according to the manufacturers’ specifications using a torque driver, and the cameras recorded their relative position again. Three-dimensional image correlation was used to measure and compare crown positions, first hand tightened and then torque driven. The displacement test was repeated 3 times for each crown. Commercial image correlation software was used to extract the data and compare the amount of displacement vertically, mesiodistally, and buccolingually. Repeated-measures ANOVA calculated the relative displacements for all 5 specimens for each implant for both crown screw hand tightening and after applied torque. A Student t test with Bonferroni correction was used for pairwise comparison of interest to determine statistical differences between the 2 implants (α=.05). Results The mean vertical displacements were statistically higher than the mean displacements in the mesiodistal and buccolingual directions for both implants ( P P P >.05). Conclusions Within the limitations of this in?vitro study, screw-retained zirconia crowns tended to displace in all 3 directions, with the highest mean displacement in the vertical direction at iteration 1. However, the amount of displacement of crowns between the 2 different implants was statistically insignificant for all directions and iterations.
机译：摘要解决问题的内锥形植入物 - 邻接连接没有水平平台可能导致螺杆紧固和扭矩施加期间的冠位移。该位移可能影响最终假体的近端触点和闭塞。目的，其在体外研究中的目的是评估定制螺旋保管氧化锆单冠的位移到最近引入的3D中的内部锥形密封植入邻接连接在手和扭矩驱动器螺钉拧紧中。材料和方法立体丙烯酸树脂模型使用来自患者的计算机断层扫描数据缺少上颌右中央门牙。使用手术指南将两个不同的内部连接植入系统（〜11.5mm〜11.5 mm）放入每个模型中的透明位置。为每个系统制造了五种螺钉保留单次氧化锆计算机辅助设计和计算机辅助制造（CAD-CAM）冠。一对高分辨率的数码相机用于记录表冠的关系到模型。使用扭矩驱动器根据制造商的规格紧固冠，并且相机再次记录其相对位置。三维图像相关性用于测量和比较冠位置，第一手拧紧，然后扭矩驱动。每个表冠重复置换测试3次。商业图像相关软件用于提取数据并垂直地，即部分阶段和Buccoling的量度比较。重复测量ANOVA为每个植入物的所有5个样本的相对位移计算，用于冠螺钉手紧固和施加扭矩后。使用Bonferroni校正的学生T测试用于对兴趣的成对比较来确定2种植体（α= .05）之间的统计差异。结果平均垂直位移统计学高于植入物（P P> .05）的关系中的平均位移和平均位移。结论在其上的局限质中，螺旋保留的氧化锆冠倾向于在所有3方向上移位，在迭代方向上的垂直方向上的最高平均位移1。然而，2种不同植入物之间的冠部位移量对所有方向和迭代有统计上微不足道。

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  • 作者

    Hanadi A. Rebeeah; Burak Yilmaz; Jeremy D. Seidt; Edwin McGlumphy; Nancy Clelland; William Brantley;

  • 作者单位

    Division of Prosthetic Dentistry Hamad Medical Corporation;

    Division of Restorative and Prosthetic Dentistry The Ohio State University College of Dentistry;

    Department of Mechanical and Aerospace Engineering The Ohio State University College of Engineering;

    Division of Restorative and Prosthetic Dentistry The Ohio State University College of Dentistry;

    Division of Restorative and Prosthetic Dentistry The Ohio State University College of Dentistry;

    Professor and Director of Graduate Program in Dental Materials Science Interim Chair of Division;

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  • 正文语种 eng
  • 中图分类 口腔科学;
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