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New Type of Nano-zinc Oxide Root Canal Filling Paste Physical Properties of Laboratory Studies

Author: LangXiaoBin
Tutor: RenJiFang
School: Shanxi Medical
Course: Clinical Stomatology
Keywords: Carbitol Clove oil ZnO Nanoparticles Physical properties Cytotoxicity
CLC: R781.05
Type: Master's thesis
Year: 2010
Downloads: 42
Quote: 0
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Abstract


Objective: laboratory studies, evaluation of novel nano-zinc oxide root canal sealers change after the physical and chemical properties of the modified liquid. Intended to study whether to maintain clove analgesic, disinfecting, antiseptic effect, and to guarantee the necessary physical and chemical properties of the paste on the basis of, the eugenol content to a minimum. Method: 1, eugenol and carbitol a ratio of 1:1, 2:1 and 3:1 of the mixing, each of the liquid and nano-zinc oxide powders tune synthetic pastes, laboratory testing different concentrations of clove under nano the physical properties of zinc oxide root canal sealers, select the second experiment of the various physical properties compared with the ideal set of fixed-oriented research in the experimental group. New type of nano-zinc oxide will experiment 1 improved after root canal sealers (experimental group) with AHplus the paste and Cortisomal paste divided into three groups, respectively, to test the physical properties of the three experimental groups paste each group the paste test 10 samples averaged. According to ISO6876 method of testing a sample shrinkage, film thickness, flowability, solubility, and other physical properties of the various experimental groups. Shrinkage for the first measurement of the height of the sample L has a diameter of R, and then measuring the sample after soaking in deionized water for 30 days and after sucking sample height L30 diameter R30, each measured 10 times, and the average value as a sample test values , and calculate the volume of the sample rate of change of Vc (%). The film thickness of the first measurement of the two closely combined thickness of the glass sheet, and then measuring the total thickness of the two glass sheets and an intermediate paste, the difference is the thickness of the film as a sample test values ??were measured 10 times, the average , to arrive at the sample film thickness. Fluidity that the maximum diameter and the minimum diameter of the disc \Solubility respectively measuring solid paste weight before and after soaking in water M in deionized, each sample was measured 10 times, to calculate the change in weight of the paste, the mean value. Results: The experiment proceeds, clove and carbitol liquid after mixing to a 2:1 ratio to the optimum ratio required for the experiment. Shrinkage Experimental results show that: the new nano-zinc oxide group, the volume change was 0.63%, while the volume change rate Cortisomal pastes and AHplus of paste were 1.23% and 0.71%. The paste film thickness results show: the new nano-zinc oxide group a film thickness of 0.022mm, and Cortisomal paste and AHplus of paste film having a thickness of 0.092mm and 0.078mm. The fluidity results show: new nano-zinc oxide groups having a diameter of 24.55mm, and the diameter of the Cortisomal paste and AHplus of the paste were 21.00mm and 22.70mm. The solubility experiment results show that: The new nano-ZnO group solubility is 0.41%, while the paste of solubility of Cortisomal pastes and AHplus of 2.02% and 0.62%, respectively. Experimental data showed that when clove oil card must alcohol mixed as paste liquid material, the physical properties of new nano-zinc oxide root canal sealers comply with the provisions in the ISO6876 standard. Conclusion: 1, clove oil, and carbitol as the paste liquid ingredients mixed in a 2:1 ratio, the various physical properties of the paste slightly superior to the proportion of other liquids formed pastes performance. Novel nano-zinc oxide root canal sealers film thickness than the thickness of the film the Cortisomal pastes and AHplus of paste to be thin, and to comply with the standards under ISO6876. 3, new type of nano-zinc oxide root canal sealers, and AHplus paste volume change rate in line with ISO6876 standards required, and the the novel ZnO Nanoparticles root canal sealers is smaller than Cortisomal pastes and AHplus of paste volume change rate. 4 new nano-zinc oxide root canal sealers diameter Cortisomal paste and AHplus paste diameter or less, no difference between the three, three are in line with the ISO6876 standard. 5, the new type of nano-zinc oxide root charge the paste with AHplus paste solubility similar, both significantly less than the Cortisomal paste solubility. The three paste solubility are in line with the ISO6876 standard.

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CLC: > Medicine, health > Oral Sciences > Oral medicine > Therapy
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