• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Journal of Prosthetic Dentistry >Accuracy and reproducibility of virtual edentulous casts created by laboratory impression scan protocols
【24h】

Accuracy and reproducibility of virtual edentulous casts created by laboratory impression scan protocols

机译：通过实验室印象扫描协议创建的虚拟伪造铸件的准确性和再现性

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Statement of ProblemAlthough computer-aided design and computer-aided manufacturing (CAD-CAM) complete removable dental prostheses (CRDPs) have gained popularity, conventional impressions are still common for CAD-CAM CRDP treatment. These need to be digitized and converted into virtual edentulous casts with a laboratory impression scan protocol during prosthesis fabrication. How this can best be accomplished is unclear. PurposeThe purpose of this in?vitro study was to compare the accuracy and reproducibility of virtual edentulous casts created by a dental laboratory laser scanner and a cone beam computed tomography (CBCT) scanner with a digitized master cast. Material and methodsA master cast was digitized as the virtual reference cast. Ten polyvinyl siloxane impressions were made on the master cast and scanned with the dental laboratory laser scanner and CBCT scanner. The impressions were sprayed with antiglare spray and rescanned. Four groups of virtual study casts (N=40) were created from the impression scans. All virtual study casts and the reference cast were registered with surface-matching software, and the root mean square (RMS) values (representation of overall accuracy) and percentage of measurement data points within 1 standard deviation (SD) of mean RMS values (%, representation of overall reproducibility) among the 4 study groups were measured. Additionally, 95 numeric distance differences (representation of accuracy at each region) were measured in 5 distinct regions: the apex of the denture border, 6 mm from denture border, crest of the ridge, palate, and posterior palatal seal. The repeated-measures ANOVA and post hoc test (tgrouping) were used to determine statistical differences (α=.05). ResultsThe laboratory scanner group had a significantly larger RMS value (4.0 ±0.3 μm,P<.001) and smaller percentage of measurement data points within 1 SD of mean RMS value (77.5 ±1.0%,P<.001). The RMS values between the CBCT scanner (1.2 ±0.3 μm) and CBCT scanner–spray (1.1 ±0.2 μm) groups were not significantly different (P=.968), and the percentage of measurement data points within 1 SD of mean RMS values (90.1 ±1.1% versus 89.5 ±0.8%) were also not significantly different (P=.662). The numeric distance differences across 5 regions were affected by the scanning protocols (P<.001). The laboratory scanner and laboratory scanner–spray groups had significantly higher numeric distance differences at the apex of the denture border and crest of the ridge regions (P<.001). ConclusionsThe CBCT scanner created more accurate and reproducible virtual edentulous casts, and the antiglare spray only significantly improved the accuracy and reproducibility of virtual edentulous casts created by the dental laboratory laser scanner. The accuracy of the virtual edentulous casts was different across 5 regions and was affected by the scanning protocols.
机译：问题声明虽然计算机辅助设计和计算机辅助制造（CAD-CAM）完全可拆卸牙科假肢（CRDPS）越来越受欢迎，传统印象仍然是CAD-CAM CRDP处理的常见。这些需要在假体制造期间用实验室印象扫描方案进行数字化并转换为虚拟凭证投射。如何最好地完成，尚不清楚。目的的目的是在体外研究的目的是比较由牙科实验室激光扫描仪和锥形光束计算机断层扫描（CBCT）扫描仪创造的虚拟伪造铸件的准确性和再现性与数字化主铸造。材料和MetableA Master Cast被数字化为虚拟参考演员。在主铸造中，10种聚乙烯醇硅氧烷印象并用牙科实验室激光扫描仪和CBCT扫描仪扫描。用防眩光喷洒并重新扫描该印模。从印模扫描中创建了四组虚拟研究演员（n = 40）。所有虚拟学习演员和参考演员都以表面匹配的软件注册，以及均线偏差（SD）的均方根（RMS）值（总体精度的表示）和百分比的平均RMS值（SD）（％）测量了4组研究组中的整体再现性的表示。另外，在5个不同的区域中测量了95个数值距离（在每个区域的准确性表示）：义齿边界的顶点，距义齿边界6毫米，脊柱，腭和后腭密封。反复测量Anova和后HOC测试（T Prouping）用于确定统计差异（α= .05）。结果验收的实验室扫描仪组的RMS值明显较大（4.0±0.3μm，p <.001），并且在平均rms值的1 sd内测量数据点的较小百分比（77.5±1.0％，p <.001）。 CBCT扫描仪（1.2±0.3μm）和CBCT扫描仪喷雾（1.1±0.2μm）组之间的RMS值没有显着差异（p = .968），并且在平均rms值的1 sd内测量数据点的百分比（90.1±1.1％而导致89.5±0.8％）也没有显着差异（p = .662）。 5个区域的数值距离差异受扫描协议的影响（P <.001）。实验室扫描仪和实验室扫描仪喷雾组在义齿边界的顶点和脊区域的嵴顶部具有显着较高的数值差异（P <.001）。结论CBCT扫描仪创造了更准确和可重复的虚拟薄型铸件，防眩光喷雾显着提高了牙科实验室激光扫描仪创造的虚拟伪造铸件的准确性和再现性。虚拟凭证演员的准确性在5个地区不同，受扫描协议的影响。

著录项

  • 来源
  • 作者

    Lingyan Peng; Li Chen; Bryan T. Harris; Bikash Bhandari; Dean Morton; Wei-Shao Lin;

  • 作者单位

    Former ITI Scholar Division of Prosthodontics Department of Oral Health and Rehabilitation;

    Former ITI Scholar Division of Prosthodontics Department of Oral Health and Rehabilitation;

    Division of Prosthodontics Department of Oral Health and Rehabilitation School of Dentistry;

    Biostatistician Department of Bioinformatics and Biostatistcs School of Public Health and;

    Department of Prosthodontics Indiana University School of Dentistry;

    Division of Prosthodontics Department of Oral Health and Rehabilitation University of Louisville;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 口腔科学;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号