蓖麻油基实验性牙科黏结剂的直径拉伸强度和膜厚度。

Diametral tensile strength and film thickness of an experimental dental luting agent derived from castor oil.

机构信息

Department of Dental Materials and Prosthodontics, Araraquara Dental School, Univ. Estadual Paulista, Araraquara, SP, Brazil.

出版信息

J Appl Oral Sci. 2012 Feb;20(1):16-20. doi: 10.1590/s1678-77572012000100004.

DOI:10.1590/s1678-77572012000100004

PMID:22437672

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3928766/

Abstract

UNLABELLED

The need to develop new dental luting agents in order to improve the success of treatments has greatly motivated research.

OBJECTIVE

The aim of this study was to evaluate the diametral tensile strength (DTS) and film thickness (FT) of an experimental dental luting agent derived from castor oil (COP) with or without addition of different quantities of filler (calcium carbonate - CaCO3).

MATERIAL AND METHODS

Eighty specimens were manufactured (DTS N=40; FT N=40) and divided into 4 groups: Pure COP; COP 10%; COP 50% and zinc phosphate (control). The cements were mixed according to the manufacturers' recommendations and submitted to the tests. The DTS test was performed in the MTS 810 testing machine (10 KN, 0.5 mm/min). For FT test, the cements were sandwiched between two glass plates (2 cm²) and a load of 15 kg was applied vertically on the top of the specimen for 10 min. The data were analyzed by means of one-way ANOVA and Tukey's test (α=0.05).

RESULTS

The values of DTS (MPa) were: Pure COP- 10.94 ± 1.30; COP 10%- 30.06 ± 0.64; COP 50%- 29.87 ± 0.27; zinc phosphate- 4.88 ± 0.96. The values of FT (µm) were: Pure COP- 31.09 ± 3.16; COP 10%- 17.05 ± 4.83; COP 50%- 13.03 ± 4.83; Zinc Phosphate- 20.00 ± 0.12. One-way ANOVA showed statistically significant differences among the groups (DTS - p=1.01E-40; FT - p=2.4E-10).

CONCLUSION

The experimental dental luting agent with 50% of filler showed the best diametral tensile strength and film thickness.

摘要

目的

本研究旨在评估来源于蓖麻油的实验性牙科水门汀（COP）的直径拉伸强度（DTS）和薄膜厚度（FT），添加或不添加不同量的填料（碳酸钙 - CaCO3）。

材料和方法

制作了 80 个样本（DTS N=40；FT N=40），并分为 4 组：纯 COP；COP10%；COP50%和磷酸锌（对照）。根据制造商的建议混合水泥，并进行测试。DTS 测试在 MTS 810 试验机上进行（10 KN，0.5 mm/min）。对于 FT 测试，将水泥夹在两块玻璃板（2 cm²）之间，在样品顶部垂直施加 15 kg 的负载 10 分钟。数据采用单向方差分析和 Tukey 检验（α=0.05）进行分析。

结果

DTS（MPa）值为：纯 COP-10.94±1.30；COP10%-30.06±0.64；COP50%-29.87±0.27；磷酸锌-4.88±0.96。FT（µm）值为：纯 COP-31.09±3.16；COP10%-17.05±4.83；COP50%-13.03±4.83；磷酸锌-20.00±0.12。单因素方差分析显示组间存在统计学差异（DTS-p=1.01E-40；FT-p=2.4E-10）。