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首页> 外文期刊>The Journal of Prosthetic Dentistry >Flexural strength of provisional crown and fixed partial denture resins.
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Flexural strength of provisional crown and fixed partial denture resins.

机译：临时牙冠和固定局部义齿树脂的抗弯强度。

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摘要

Statement of Problem. Provisional prostheses are subject to flexure under function. Selection of the appropriate material for their fabrication is difficult given the limited evidence-based information on the flexural strength of provisional resins. Purpose. This study compared the flexural strength of 5 methacrylate-based resins and 8 bis-acryl resins used to fabricate provisional crowns and fixed partial dentures. Material and Methods. Bar-type specimens were fabricated according to American National Standards Institute/American Dental Association specification 27. After being immersed in artificial saliva at 37 degreeC for 10 days, the specimens were fractured under 3-point loading in a universal testing machine at a crosshead speed of 0.75 mm/min. Maximal loads to fracture in Newtons were recorded. Mean flexural strengths were calculated in MPa (n = 10 per group). Comparisons were made with analysis of variance and Duncan's multiple range test (P<.05). Results. Mean flexural strengths ranged from 56.2 to 123.6 MPa. There were 4 statistically similar groups. The group with the highest strengths consisted of 4 bis-acryl materials (Provipont, Integrity, Protemp 3 Garant, and Luxatemp). Conclusion. Within the limitations of this study, flexural strengths were material- rather than category-specific. Some, but not all, bis-acryl resins demonstrated significantly superior flexural strength over traditional methacrylate resins.
机译：问题陈述。临时假体在功能下会弯曲。鉴于有关临时树脂抗弯强度的证据有限，很难选择合适的材料来制造它们。目的。这项研究比较了用于制造临时牙冠和固定局部义齿的5种基于甲基丙烯酸酯的树脂和8种双丙烯酸树脂的抗弯强度。材料与方法。根据美国国家标准协会/美国牙科协会的规格27制作棒状标本。将其浸入37°C的人造唾液中10天后，在三点载荷下以十字头速度在万能试验机中将其断裂0.75毫米/分钟记录以牛顿为单位的最大断裂载荷。平均弯曲强度以MPa计算（每组n = 10）。通过方差分析和邓肯多范围检验（P <.05）进行比较。结果。平均抗弯强度为56.2至123.6 MPa。有4个统计学上相似的组。强度最高的组包括4种双丙烯酸材料（Provipont，Integrity，Protemp 3 Garant和Luxatemp）。结论。在本研究的范围内，抗弯强度是材料而非特定类别的。与传统的甲基丙烯酸酯树脂相比，某些（但不是全部）双丙烯酸树脂表现出明显优越的抗弯强度。

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