PURPOSE To evaluate the restorative effectiveness of fiber post versus metal screw post through systematical review. METHODS Randomized controlled trials (RCTs) data from the establishment of the database up to June 2013 were searched from MEDLINE (Ovid), PubMed, The Cochrane Library, Embase, Wanfang Data, VIP, CNKI and CBM using the designed strategy. After data extraction and quality review of the retrieved articles by two independent investigators, the softwares of RevMan 5.1.0 and GRAED profiler 3.2.2 were employed to process data analysis. RESULTS Ten RCTs were finally included, of which 1 was English literature and 9 were Chinese literatures. Meta analysis suggested that the survival rate of repair of adult and young permanent teeth was significantly higher using fiber post than metal screw post [RR=1.21,95%CI(1.13,1.30), P<0.01,RR=1.21,95%CI(1.10,1.34), P<0.01], and the results root fracture rate was significantly lower [RR=0.16,95%CI(0.05,0.48),P=0.001]. No significant difference was found in the rate of post-core fall off [RR=0.76,95%CI(0.33,1.73), P>0.05] and gingivitis [RR=0.71, 95%CI(0.27,1.88), P>0.05]. All outcomes were of low quality in the GRADE system. CONCLUSIONS Compared with metal screw post, the survival rate is significantly higher and the root fracture rate is significantly lower by using fiber post. However, the conclusion is limited by lack of relevant studies, small sample sizes, inadequate quality and diversified methodology. Further study is needed by employing more well-designed, large-sample and multi-center RCTs to verify the conclusion.

In this paper, porous and highly crystalline carbon-coated TiP2O7 has been prepared by a sucrose assisted all-in-one sintering method at a much lower temperature (700°C) rather than the traditional solid-state reaction synthesis (1000°C). The prepared TiP2O7 is coated by a nanometer-thick carbon film with improved conductivity and stability in water. The electrochemical performances of this material are found greatly enhanced. The carbon-coated TiP2O7/LiMn2O4 system in 1molL−1 Li2SO4 aqueous electrolyte delivers discharge capacities of 86mAhg−1 and 40mAhg−1 at the rates of 0.25 and 10°C, respectively. Furthermore, it also exhibits an excellent cycling stability with capacity retention of 85% over 100cycles, which is much better than the bared TiP2O7.

In this paper, a work mechanism based on Newton's cradle model for secondary battery is proposed. Zn vertical bar CH3COOLi +Zn(CH3COO)(2)vertical bar LiMn2O4 binary ion battery is a typical Newton's cradle system. Its work process is discussed in detail by cyclic voltammetry (CV). inductively coupled plasma-atomic emission spectrometry (ICP-AES), scanning electron microscope (SEM) and X-ray diffraction (XRD). The charge-discharge curves and cycling calendar life as well as current rate performance indicate that the work mechanism based on Newton's cradle model operates well, the sustainable current rate larger than 20C suggests that this system can offer a considerable high power. (C) 2012 The Electrochemical Society. [DOI: 10.1149/2.082212jes] All rights reserved.