SEM and EDS comparative studies about the homogeneity of some cements used for luting of posts

Q4 Dentistry
Gina Paunita Grecu, Doina Lucia Ghergic, Raluca Monica Comaneanu, Claudia Florina Bogdan-Andreescu, Cherana Gioga, Irina Maria Gheorghiu, Anna Maria Pangica, Paula Perlea, Mihail Tarcolea
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Abstract

Objectives. The aim of the study was to evaluate comparatively by scanning electron microscope (SEM) and energy dispersive spectrophotometry (EDS) the physical and chemical homogeneity of some luting materials used for cementation of three types of posts. Materials and method. We selected 12 irretrievable monoradicular teeth extracted in our dental offices. After extraction, all teeth were prepared for cementation with 4 different cements (NANOCORE DUAL, CEMBEST, PANAVIA SA and CEMENT-ONE) of three types of posts: prefabricated titanium post, FibreKleer 4x fiberglass post (Pentron) and post cast from NiCrMo alloy. Afterwards, the samples were embedded in resin and prepared metallographically for examination with the Phenom ProX scanning electron microscope equipped with an energy dispersive spectrophotometer with X Rays. Results. SEM studies provide valuable ultrastructural information regarding the degree of filling with luting materials. The four studied cements do not present an inhomogeneous composition in the EDS analysis, not having significantly increased values between the 2 analyzed points for each of the 12 samples taken in the study. Conclusions. Among the four luting materials studied comparatively, PANAVIA SA seems to best fill the existing spaces between posts and the limits of dental preparations, being closely followed by CEMENT-One and CEMBEST. In last place is NANOCORE DUAL, which presents discontinuities in the mass of material and at the border with the preparations.
用SEM和EDS对比研究了几种粘结剂的均一性
目标。采用扫描电子显微镜(SEM)和能谱分光光度法(EDS)对比评价了三种胶结材料的物理化学均匀性。材料和方法。我们选择了12颗在我们的牙科诊所拔除的不可修复的单根牙。拔牙后,用4种不同的粘结剂(NANOCORE DUAL, CEMBEST, PANAVIA SA和CEMENT-ONE)对预制钛桩、FibreKleer 4x玻璃纤维桩(Pentron)和NiCrMo合金铸造桩进行固牙。然后,将样品包埋在树脂中,制备金相,用配备X射线能量色散分光光度计的Phenom ProX扫描电子显微镜进行检查。结果。扫描电镜研究提供了宝贵的超微结构信息的程度与填充物的材料。在EDS分析中,所研究的四种胶结物没有呈现出不均匀的成分,在研究中采集的12个样品中的每个样品的两个分析点之间没有显着增加的值。结论。在比较研究的四种填塞材料中,PANAVIA SA似乎是最好的填充桩之间的现有空间和牙科制剂的限制,紧随其后的是CEMENT-One和CEMBEST。排在最后的是NANOCORE DUAL,它呈现出材料质量和制备边界的不连续性。
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CiteScore
0.10
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0.00%
发文量
21
审稿时长
4 weeks
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