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首页> 外文期刊>The Journal of Prosthetic Dentistry >Tensile bond strength of cast commercially pure titanium and cast gold-alloy posts and cores cemented with two luting agents.
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Tensile bond strength of cast commercially pure titanium and cast gold-alloy posts and cores cemented with two luting agents.

机译：市售纯钛铸造合金和铸造金合金桩和由两种浸润剂粘合的型芯的拉伸粘结强度。

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STATEMENT OF PROBLEM: In vitro studies on the retentive strengths of various cements used to retain posts have reported conflicting results. PURPOSE: The purpose of this study was to compare the tensile strength of commercially pure titanium and type III cast gold-alloy posts and cores cemented with zinc phosphate or resin cement. MATERIAL AND METHODS: Forty-two extracted human canines were endodontically treated. The root preparations were accomplished using Largo reamers (10 mm in depth and 1.7 mm in diameter). Acrylic resin patterns for the posts and cores were made, and specimens were cast in commercially pure titanium and in type III gold alloy (n=7). Fourteen titanium cast posts and cores were submitted to surface treatment with Kroll acid solution and to scanning electron microscopy (SEM), before and after acid etching. The groups (n=7) were cemented with zinc phosphate cement or resin cement (Panavia F). Tensile strengths were measured in a universal testing machine at a crosshead speed of 0.5 mm/min. The results (Kgf) were statistically analyzed by 2-way ANOVA (alpha=.05). RESULTS: The 2-way ANOVA indicated that there were no significant differences among the groups tested. Retentive means for zinc phosphate and Panavia F cements were statistically similar. The bond strength was not influenced by the alloy, the luting material, or the etching treatment. SEM analysis indicated that the etched surfaces were smoother than those that did not receive surface treatment, but this fact did not influence the results. CONCLUSIONS: Commercially pure titanium cast posts and cores cemented with zinc phosphate and resin cements demonstrated similar mean tensile retentive values. Retentive values were also similar to mean values recorded for cast gold-alloy posts and cores cemented with zinc phosphate cement and resin cements.
机译：问题陈述：各种用于保留桩柱的水泥的固位强度的体外研究报告了相互矛盾的结果。目的：本研究的目的是比较商业纯钛和III型铸造金合金桩和芯的磷酸锌或树脂水泥的抗拉强度。材料与方法：对42只提取的人犬进行了牙髓治疗。根部准备工作使用Largo铰刀（深度10毫米，直径1.7毫米）完成。制成用于柱和芯的丙烯酸树脂图案，并用市售纯钛和III型金合金（n = 7）浇铸样品。在酸蚀之前和之后，用Kroll酸溶液对14个钛铸件和型芯进行了表面处理，并进行了扫描电子显微镜（SEM）的测试。各组（n = 7）用磷酸锌水泥或树脂水泥（Panavia F）粘接。在万能试验机中以0.5mm / min的十字头速度测量拉伸强度。通过2-方差分析（α= .05）对结果（Kgf）进行统计分析。结果：2通方差分析表明，受试组之间无显着差异。磷酸锌和Panavia F水泥的固位方法在统计学上相似。结合强度不受合金，浸润材料或蚀刻处理的影响。 SEM分析表明，蚀刻后的表面比未进行表面处理的表面光滑，但这并不影响结果。结论：用磷酸锌和树脂水泥胶结的商业纯钛铸造柱和芯显示出相似的平均拉伸保持值。保持值也类似于用磷酸锌水泥和树脂水泥粘结的铸造金合金桩和芯的平均值。

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