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首页> 外文期刊>European Journal of Dentistry >Thickness of immediate dentin sealing materials and its effect on the fracture load of a reinforced all-ceramic crown
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Thickness of immediate dentin sealing materials and its effect on the fracture load of a reinforced all-ceramic crown

机译：立即型牙本质密封材料的厚度及其对增强型全瓷冠的断裂载荷的影响

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Objectives:The objective of this study is to evaluate, in vitro, the thickness of immediate dentin sealing (IDS) materials on full crown preparations and its effect on the fracture load of a reinforced all-ceramic crown.Materials and Methods:Sixty premolars received full crown preparation and were divided into the following groups according to the IDS technique: G1-control; G2-Clearfil SE Bond; and G3-Clearfil SE Bond and Protect Liner F. After the impressions were taken, the preparations were temporized with acrylic resin crowns. IPS empress 2 restorations were fabricated and later cemented on the preparations with Panavia F. 10 specimens from each group were submitted to fracture load testing. The other 10 specimens were sectioned buccolingually before the thicknesses of Panavia F, Clearfil SE Bond and Protect Liner F were measured in 10 different positions using a microscope.Results:According to analysis of variance and Tukey's test, the fracture load of Group 3 (1300 N) was significantly higher than that of Group 1 (1001 N) (P < 0.01). Group 2 (1189 N) was not significantly different from Groups 1 and 3. The higher thickness of Clearfil SE Bond was obtained in the concave part of the preparation. Protect Liner F presented a more uniform range of values at different positions. The thickness of Panavia F was higher in the occlusal portion of the preparation.Conclusions:The film thickness formed by the IDS materials is influenced by the position under the crown, suggesting its potential to increase the fracture load of the IPS empress 2 ceramic crowns.
机译：目的：本研究的目的是在体外评估全牙冠准备中即时牙本质密封（IDS）材料的厚度及其对全瓷强化冠的断裂载荷的影响。材料和方法：接受60颗前磨牙全冠准备，并根据IDS技术分为以下几组：G1对照; G2-Clearfil SE键;压印后，用丙烯酸树脂冠进行调质。制作了IPS Empress 2修复体，然后将其与Panavia F粘合在制剂上。每组的10个样本进行了断裂载荷测试。对其他10个标本进行颊切切片，然后使用显微镜在10个不同位置测量Panavia F，Clearfil SE Bond和Protecter Liner F的厚度。结果：根据方差分析和Tukey检验，第3组的断裂载荷（1300 N）明显高于第1组（1001 N）（P <0.01）。第2组（1189 N）与第1组和第3组没有显着差异。在制品的凹入部分获得了更高的Clearfil SE Bond厚度。保护衬板F在不同位置显示的值范围更加统一。结论：IDS材料形成的膜厚受冠下位置的影响，提示其可能增加IPS Empress 2号陶瓷冠的断裂载荷。

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