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首页> 外文期刊>International Journal of Environmental Research and Public Health >3D Printed Temporary Veneer Restoring Autotransplanted Teeth in Children: Design and Concept Validation Ex Vivo
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3D Printed Temporary Veneer Restoring Autotransplanted Teeth in Children: Design and Concept Validation Ex Vivo

机译：3D打印的临时贴面修复儿童的自移植牙齿：体外设计和概念验证

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(1) Background: Three-dimensional printing is progressing rapidly and is applied in many fields of dentistry. Tooth autotransplantation offers a viable biological approach to tooth replacement in children and adolescents. Restoring or reshaping the transplanted tooth to the anterior maxilla should be done as soon as possible for psychological and aesthetic reasons. However, to avoid interfering with the natural healing process, reshaping of transplanted teeth is usually delayed three to four months after transplantation. This delay creates a need for simple indirect temporary aesthetic restoration for autotransplanted teeth. The aim of this study was to develop and validate a digital solution for temporary restoration of autotransplanted teeth using 3D printing. (2) Methods: Four dry human skulls and four dry human mandibles were scanned using cone beam computed tomography to create 3D models for 15 premolars. Digital impression of the maxillary arch of one of the skulls was captured by intra oral scanner. The digital work flow for the design and fabrication of temporary veneers is presented. The seating and adaptation of the 3D printed veneers were evaluated using stereomicroscopy and micro-computed tomography. (3) Results: Evaluation of the veneer seating using stereomicroscopy showed that the mean marginal gap at all of the sides was below the cut-off value of 200 μm. The overall mean marginal gap was 99.9 ± 50.7 μm (median: 87.8 (IQR 64.2–133 μm)). The internal adaptation evaluation using micro-computed tomography showed an average median gap thickness of 152.5 ± 47.7 (IQR 129–149.3 μm). (4) Conclusions: The present concept of using temporary veneers that are designed and fabricated with CAD/CAM (computer-aided design/computer-aided manufacturing) technology using a DLP (digital light processing) printer may present a viable treatment option for restoration of autotransplanted teeth.
机译：（1）背景：三维打印正在迅速发展，并已应用于牙科的许多领域。自体牙齿移植为儿童和青少年的牙齿置换提供了可行的生物学方法。出于心理和美学原因，应尽快对上颌前牙进行修复或整形。但是，为避免干扰自然的愈合过程，通常会在移植后三到四个月延迟重塑移植牙齿的形状。这种延迟导致需要对自动移植的牙齿进行简单的间接临时美观修复。这项研究的目的是开发和验证一种使用3D打印临时修复自动移植牙齿的数字解决方案。 （2）方法：使用锥束计算机断层扫描技术扫描四个干燥的人类头骨和四个干燥的人类下颌骨，以创建15个前磨牙的3D模型。通过口腔内扫描仪捕获头骨之一的上颌弓的数字印象。介绍了用于临时饰面设计和制造的数字工作流程。使用立体显微镜和微计算机断层扫描技术评估3D打印胶合板的位置和适应性。 （3）结果：使用立体显微镜对单板的座置进行评估表明，在所有侧面上的平均边缘间隙均低于200μm的临界值。整体平均边缘间隙为99.9±50.7μm（中位数：87.8（IQR 64.2–133μm））。使用微计算机断层扫描进行的内部适应性评估显示，平均间隙间隙厚度为152.5±47.7（IQR 129–149.3μm）。 （4）结论：使用通过CAD / CAM（计算机辅助设计/计算机辅助制造）技术和DLP（数字光处理）打印机设计和制造的临时饰面的当前概念可能会提供可行的修复方案自移植牙齿。

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