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首页> 外文期刊>The Journal of Prosthetic Dentistry >Accuracy of 3 conceptually different die systems used for implant casts.
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Accuracy of 3 conceptually different die systems used for implant casts.

机译：用于种植体铸模的3个概念不同的模具系统的精度。

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STATEMENT OF PROBLEM: Given that meticulous implant prosthodontic procedures are recommended to obtain the best possible intraoral fit, the die systems used for multi-implant casts warrant further investigation. PURPOSE. The purpose of this in vitro study was to compare the accuracy of implant casts fabricated from 3 conceptually different die systems at the solid, sectioned, and repeated stages. MATERIAL AND METHODS: Thirty direct transfer implant impressions were made of the master cast with a polyether impression material. Ten experimental implant casts were fabricated for each of the 3 different die systems tested: double-pour (Pindex), plastic base (DVA), and die tray (KO Tray). The solid experimental casts were sectioned and then removed from the die system 30 times. Linear distances between steel balls placed on each abutment replica were measured with a traveling microscope to determine the accuracy of the experimental casts at different stages. Data were analyzed with repeated-measures analysis of variance (alpha=.05) and the post hoc Ryan-Einot-Gabriel-Welsch multiple-range test (REGWQ). RESULTS: Repeated-measures analysis of variance revealed a significant interaction between the die systems and different stages (P=.0432). REGWQ showed the die tray system to be significantly more accurate at the solid than at the sectioned and repeated stages. The die tray system was significantly less accurate than the double-pour and plastic base systems at the sectioned stage. CONCLUSION: Within the limitations of this study, the use of a double-pour or plastic base die system is recommended when sectioned dies are needed for a multi-implant-retained prosthesis.
机译：问题陈述：鉴于建议进行精心的植入物义齿修复程序以获得最佳的口腔内贴合性，因此用于多植入物铸件的模具系统值得进一步研究。目的。这项体外研究的目的是比较在实心，分段和重复阶段由3个概念不同的模具系统制造的植入物铸件的准确性。材料与方法：用聚醚压印材料制成的母模制成30个直接转移植入物压印。为测试的3种不同模具系统分别制造了10个实验植入物铸件：双浇注（Pindex），塑料底座（DVA）和模具托盘（KO Tray）。将固体实验铸件切成薄片，然后从模具系统中取出30次。用移动显微镜测量放置在每个基台复制品上的钢球之间的线性距离，以确定不同阶段实验铸件的精度。使用方差重复测量分析（alpha = .05）和事后Ryan-Einot-Gabriel-Welsch多范围检验（REGWQ）对数据进行分析。结果：方差的重复测量分析表明，模具系统与不同阶段之间存在显着的相互作用（P = .0432）。 REGWQ显示，模具托盘系统在固体上比在分段和重复阶段的精度要高得多。模具托盘系统在分段阶段的精度明显低于双浇注和塑料基座系统。结论：在本研究的局限性内，当需要多块植入物固定的假体需要切片模具时，建议使用双浇注或塑料基模系统。

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