Silver amalgam contains mercury leading to concerns about the potential toxic effects of amalgam on the health of dental patients. The debate over the toxicity of silver amalgam restorations has divided the dental pro...Silver amalgam contains mercury leading to concerns about the potential toxic effects of amalgam on the health of dental patients. The debate over the toxicity of silver amalgam restorations has divided the dental profession for over a century. The use of amalgam restorations for anterior teeth have been declining worldwide due to patient's safety concerns and preference for tooth colored restorations. Nevertheless, amalgam has served the dental profession for decades and benefited hundreds of millions of patients because of its longevity as a dental restorative material. Amalgam is still the World's most widely used restorative material for posterior teeth.展开更多
Tembotrione is herbicide which belongs to the triketone group of herbicides. It’s registered as a selective, post-emergence herbicide developed for the control of a broad spectrum broadleaf and grassy weeds in corn. ...Tembotrione is herbicide which belongs to the triketone group of herbicides. It’s registered as a selective, post-emergence herbicide developed for the control of a broad spectrum broadleaf and grassy weeds in corn. There is little information about tembotrione because of his short presence in the market. Due to its ever wider application, it is important to know the details of its chemical characteristics and redox processes, including biogeochemical transformation and migration after application to agricultural land, which could contribute to its efficient and safer application. In this paper we examined voltammetric behavior of tembotrione using Silver/Amalgam (Ag/Hg) electrode. For the investigation of electrochemical behavior we used the cyclic voltammetry technique, with conventional three-electrode cell and electrochemical workstation. During the experiment pH values of solution varieties while constant concentration of tembotrione was maintained. Cyclic voltammograms were recorded at pH values 6, 8, 10 and 12, at which tembotrione was electrochemically active. At this pH values two signals were observed. Optimum pH value, at which the current intensity was greatest, was 12. Obtained results provide relevant information on the electrochemical behavior of tembotrione, which can serve as a basis for the development of electrochemical techniques for the removal and degradation of this pesticide in the environment.展开更多
目的:评价iRoot BP Plus在老年根尖手术中的临床效果。方法:选取2009年11月-2015年5月收治于我院口腔内科的老年难治性根尖周炎患者53例,共54颗患牙。分为银汞组、MTA组、iRoot BP Plus组,对所有患者进行根尖手术,将各组术后1年O-PAI指...目的:评价iRoot BP Plus在老年根尖手术中的临床效果。方法:选取2009年11月-2015年5月收治于我院口腔内科的老年难治性根尖周炎患者53例,共54颗患牙。分为银汞组、MTA组、iRoot BP Plus组,对所有患者进行根尖手术,将各组术后1年O-PAI指数、治愈率进行比较。结果:术后1年银汞组的O-PAI指数高于其余两组(P<0.05),MTA组和iRoot BP Plus组的O-PAI指数无差异(P>0.05)。MTA组和iRoot BP Plus组术后1年的愈合率优于银汞组(P<0.05),而MTA组和iRoot BP Plus组之间无差异(P>0.05)。结论:iRoot BP Plus在控制根尖炎症,提高根尖手术愈合率方面,与MTA具有同样理想的临床效果,值得临床进一步应用。展开更多
文摘Silver amalgam contains mercury leading to concerns about the potential toxic effects of amalgam on the health of dental patients. The debate over the toxicity of silver amalgam restorations has divided the dental profession for over a century. The use of amalgam restorations for anterior teeth have been declining worldwide due to patient's safety concerns and preference for tooth colored restorations. Nevertheless, amalgam has served the dental profession for decades and benefited hundreds of millions of patients because of its longevity as a dental restorative material. Amalgam is still the World's most widely used restorative material for posterior teeth.
基金This paper is supported by Serbian Ministry of Education and Science,project number 172030.
文摘Tembotrione is herbicide which belongs to the triketone group of herbicides. It’s registered as a selective, post-emergence herbicide developed for the control of a broad spectrum broadleaf and grassy weeds in corn. There is little information about tembotrione because of his short presence in the market. Due to its ever wider application, it is important to know the details of its chemical characteristics and redox processes, including biogeochemical transformation and migration after application to agricultural land, which could contribute to its efficient and safer application. In this paper we examined voltammetric behavior of tembotrione using Silver/Amalgam (Ag/Hg) electrode. For the investigation of electrochemical behavior we used the cyclic voltammetry technique, with conventional three-electrode cell and electrochemical workstation. During the experiment pH values of solution varieties while constant concentration of tembotrione was maintained. Cyclic voltammograms were recorded at pH values 6, 8, 10 and 12, at which tembotrione was electrochemically active. At this pH values two signals were observed. Optimum pH value, at which the current intensity was greatest, was 12. Obtained results provide relevant information on the electrochemical behavior of tembotrione, which can serve as a basis for the development of electrochemical techniques for the removal and degradation of this pesticide in the environment.
文摘目的:评价iRoot BP Plus在老年根尖手术中的临床效果。方法:选取2009年11月-2015年5月收治于我院口腔内科的老年难治性根尖周炎患者53例,共54颗患牙。分为银汞组、MTA组、iRoot BP Plus组,对所有患者进行根尖手术,将各组术后1年O-PAI指数、治愈率进行比较。结果:术后1年银汞组的O-PAI指数高于其余两组(P<0.05),MTA组和iRoot BP Plus组的O-PAI指数无差异(P>0.05)。MTA组和iRoot BP Plus组术后1年的愈合率优于银汞组(P<0.05),而MTA组和iRoot BP Plus组之间无差异(P>0.05)。结论:iRoot BP Plus在控制根尖炎症,提高根尖手术愈合率方面,与MTA具有同样理想的临床效果,值得临床进一步应用。
