• 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 >An evaluation of impression techniques for multiple internal connection implant prostheses.
【24h】

An evaluation of impression techniques for multiple internal connection implant prostheses.

机译：对多个内部连接植入物假体的压印技术的评估。

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 problem Movement of impression copings inside the impression material using an open-tray impression technique during clinical and laboratory phases may cause inaccuracy in transferring the 3-dimensional spatial orientation of implants intraorally to the definitive cast. Consequently the restoration may require corrective procedures. Purpose This in vitro study evaluated the accuracy of 3 different impression techniques using polyether impression material to obtain a precise definitive cast for a multi-unit implant restoration with multiple internal connection implants. Material and methods A reference acrylic resin model with 4 internal connection implants (3i Implant Innovations) was fabricated. Forty-five medium-consistency polyether impressions (Impregum Penta) of this model were made with square impression copings using an open-tray technique. Three groups of 15 specimens each were made with different impression techniques: in the first group, nonmodified square impression copings wereused (NM group); in the second group, square impression copings were used and joined together with autopolymerizing acrylic resin before the impression procedure (R [resin] group); and in the third group, square impression copings previously airborne-particle abraded and coated with the manufacturer-recommended impression adhesive were used (M [modified] group). Matching implant replicas were screwed into the square impression copings in the impressions. Impressions were poured with ADA type IV stone (New Fujirock). A single calibrated examiner blinded to the nature of the impression technique used examined all definitive casts to evaluate the positional accuracy (mum) of the implant replica heads using a profile projector (at original magnification x10). These measurements were compared to the measurements calculated on the reference resin model which served as control. Data were analyzed with a 1-way analysis of variance at alpha=.05, followed by the Student Newman-Keuls test (alpha=.05). Results The data obtained with the profile projector revealed significant differences within the 3 impression techniques ( P <.001). The Student Newman-Keuls procedure disclosed significant differences between the groups, with group R casts being significantly more accurate than group NM and group M casts ( P =.05). The mean distance (+/-SD) between the posterior implants compared to the reference acrylic resin model was 18.17 mum (+/- 6.4) greater for group R casts, 41.27 mum (+/- 8.4) greater for group M casts, and 46.21 mum (+/- 8.9) greater for group NM casts. Distances between the anterior implants were also greater than those recorded on the reference model. The distance was 15.23 mum (+/- 5.9) greater on group R casts, 38.17 mum (+/- 8.3) greater on group M casts, and 43.23 mum (+/- 8.7) greater on group NM casts. Conclusion Within the limitations of this study, improved accuracy of the definitive cast was achieved when the square impression copings joined together with autopolymerizing acrylic resin were used to make an impression of multiple internal connection implants.
机译：问题陈述在临床和实验室阶段，使用开放式托盘压印技术在压印材料内部移动压印盖可能会导致将植入物的3维空间取向从口内转移到确定的模型上的准确性。因此，恢复可能需要纠正程序。目的这项体外研究评估了三种不同的压印技术的准确性，这些技术使用了聚醚压印材料以获得用于具有多个内部连接植入物的多单元植入物修复的精确确定铸件。材料和方法制作了具有4个内部连接植入物的参考丙烯酸树脂模型（3i Implant Innovations）。该模型的四十五个中等浓度的聚醚印模（Impregum Penta）是使用开放式纸盘技术用正方形印模处理的。三组，每组15个标本，用不同的压印技术制成：第一组，使用未经修饰的方形压印帽（NM组）;在第二组中，使用方形压印帽，并在压印程序之前将其与自聚合丙烯酸树脂连接在一起（R [树脂]组）;在第三组中，使用了预先打磨过的机载颗粒并涂有制造商推荐的压印粘合剂的方形压印涂层（M [改良]组）。将匹配的植入物复制品拧入压痕的方形压痕顶盖中。印象深刻的是ADA IV型石头（New Fujirock）。一个校准的检查员对所使用的压印技术的本质视而不见，使用轮廓投影仪（原始放大倍数x10）检查了所有确定的铸件，以评估植入物复制头的位置精度（妈妈）。将这些测量值与在用作对照的参考树脂模型上计算出的测量值进行比较。使用方差为1 = 0.05的1次方差分析对数据进行分析，然后进行Student Newman-Keuls检验（alpha = .05）。结果用轮廓投影仪获得的数据显示出3种压印技术之间存在显着差异（P <.001）。 Student Newman-Keuls程序揭示了各组之间的显着差异，R组演员比NM组和M组演员准确得多（P = .05）。与参考丙烯酸树脂模型相比，后植入物之间的平均距离（+/- SD）对于R组铸件要大18.17毫米（+/- 6.4），对于M组铸件要大41.27毫米（+/- 8.4），并且组NM演员高46.21毫米（+/- 8.9）。前植入物之间的距离也大于参考模型上记录的距离。 R组演员的距离为15.23毫米（+/- 5.9），M组演员的距离为38.17毫米（+/- 8.3），而NM组为43.23毫米（+/- 8.7）。结论在本研究的范围内，当方形压印帽与自聚合丙烯酸树脂连接在一起以制作多个内部连接植入物的印模时，最终铸件的精度得以提高。

著录项

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