Microleakage of various cementing agents for full cast crowns
Microleakage of various cementing agents for full cast crowns
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DOI：
10.1016/j.dental.2004.07.009
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发表时间：
2005-05-01
期刊：
影响因子：
5
通讯作者：
Sorensen, JA
中科院分区：
文献类型：
--
作者：
Piwowarczyk, A;Lauer, HC;Sorensen, JA
目标.评价用六种不同类型的胶固剂粘结的全铸冠修复体的微渗漏和边缘间隙。方法。以标准化方式制备60颗非龋性人前磨牙和磨牙，用于全铸造冠修复。近远中缘位于牙本质内，白色前庭缘和腭舌缘位于釉质内。牙冠由高金合金使用标准化技术制成。将样本随机分为6组：一种磷酸锌骨水泥（哈佛骨水泥）、一种传统玻璃离子骨水泥（Fuji 1）、一种树脂改性玻璃离子骨水泥（Fuji Plus）、两种标准树脂骨水泥（RelyX ARC，Panavia F）和一种自粘性通用树脂骨水泥（RelyX Unicem）。在37 ℃的蒸馏水中储存4周后，将样品在5至55 ℃的范围内进行5000次热循环。然后，将它们置于硝酸银溶液中，包埋在树脂块中，并沿颊舌和近远中方向垂直切割。随后，使用高分辨率数字显微镜摄像机对这些对象进行微渗漏和边缘间隙的评估。许多组间差异具有统计学显著性。RelyX Unicem在牙釉质和牙本质中均显示出最小程度的微渗漏。Panavia F und RelyX Unicem的边缘间隙明显大于所有其他骨水泥。在釉质上使用哈佛骨水泥时，除了弱的直接相关性外，未观察到微渗漏和边缘间隙之间的相关性。研究的胶结剂显示出不同的密封能力。这些差异与特定类型的材料无关。(c)2004年牙科材料学院。由爱思唯尔有限公司出版。保留所有权利。
Objectives. To evaluate microleakage and marginal gaps in full cast crown restorations bonded with six different types of cementing agents.Methods. Sixty non-carious human premolars; and molars were prepared in a standardized manner for full cast crown restorations. The mesial and distal margins were located in dentin, white the vestibular and palatal/lingual margins were located in enamel. Crowns were made from a high-gold alloy using a standardized technique. The specimens were randomized to six groups of cementing agents: one zinc-phosphate cement (Harvard cement), one conventional glass-ionomer cement (Fuji 1), one resin-modified glass-ionomer cement (Fuji Plus), two standard resin cements (RelyX ARC, Panavia F), and one self-adhesive universal resin cement (RelyX Unicem). After 4 weeks of storage in distilled water at 37 degrees C, the specimens were subjected to 5000 thermocycles ranging from 5 to 55 degrees C. Then, they were placed in a silver nitrate solution, embedded in resin blocks, and vertically cut in buccolingual and mesiodistal direction. Subsequently, the objects were evaluated for microleakage and marginal gap using a high-resolution digital microscope camera.Results. A number of inter-group differences were statistically significant. RelyX Unicem showed the smallest degree of microleakage both in enamel and in dentin. Panavia F und RelyX Unicem were associated with significantly larger marginal gaps than all other cementing agents. No association was observed between microleakage and marginal gap other than a weak direct correlation when using Harvard cement on enamel.Significance. The cementing agents investigated revealed different seating abilities. These differences were not associated with specific types of materials. (c) 2004 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.