Objective To study the self-locking brackets SmartclipTM 3MXTM MBTTM brackets and traditional pain comparison.Methods 72 patients with non-extraction orthodontic treatment were randomly divided into two groups,a group treated with self-locking brackets,the other group treated with traditional care slot.Patients in orthodontic treatment of pain within a week were inoestigated by way of a questionnaire survey,including orthodontic pain,soft tissue irritation,and the strength of a normal life for patients with the impact.Results Questionnaire response rate was 94.4％.The level of pain was similar in self-ligating bracket group and the traditional bracket group.However,time-related,including pain after orthodontic treatment was 3h,1 d time,the most intense pain and continued to 3d,back pain relief,1w about pain relief.Conclusion Self-locking brackets and brackets have noobvious pain intensity differences,but related with orthodontic force to the clinical use of force should pay attention to light.

BACKGROUND:Self-locking brackets changed the traditional ligation mode and obviously elevated the sliding mechanism of the teeth and the effect of its spreading during orthodontic treatment, and effectively decreased friction force. OBJECTIVE:To explore the differences of the application of 3M self-locking bracket and traditional straight wire bracket during orthodontic treatment. METHODS:A total of 796 patients receiving orthodontic correction of mild and moderate misaligned teeth, including 398 males and 400 females, at the age of 11-19 years old. 398 patients received 3M SmartClipTM self-ligating bracket braces as observation group. The remaining 398 patients received MBT straight wire appliance. The width of molars, intercanine width, superior anterior tooth convexity and correction were compared between the two groups. RESULTS AND CONCLUSION:The width of premolars and superior anterior tooth convexity were significantly better after correction than that before correction in both groups (P<0.05). Moreover, the correction outcomes were significantly better in the observation group than in the control group (P<0.05). No significant difference in the width of first molar and intercanine width was detected before and after treatment in either group, as wel as between the two groups. Aligned dentition time and the total therapeutic duration were shorter in the observation group than in the control group (P<0.05). These findings indicate that compared with the traditional MBT straight wire bracket braces, expansion arch effect of the 3M SmartClipTM self-ligating bracket braces is obvious;clinical treatment can reduce the rate of extraction cases, and shorten the course of correction.

Objective:To compare the marginal microleakage of various d ental filling materials. Methods:45 extracted caries-free teeth were divided into 3 groups with 15 in each. The teeth were cleaned and standard cavity of I and V were prepared and filled with silver amalgm(group 1), GI-1 g lass ion cement(group 2) and glassionomer cement FX(group 3) respectively. The s amples were kept at 37 ℃ for 1-3 months.Dye penetration test was used to obser ve the marginal microleakage.The space between the restorations and tooth struct ure was measured under an electronmicroscope. Results:Dye penetr ation was observed in all the three groups.The teeth with grade 1, 2 and 3 penet ration in group 1 were 11,4 and 0, in group 2 were 1,4 and 10,in group 3 were 2, 8 and 5(P

Melatonin (MT) is secreted by the pineal gland and has obvious biological rhythmicity including circadian, season rhythm and life rhythm (aging clock). The reduction of MT secretion is related to body aging, particularly in close relation to brain aging. The hypothesis of aging is involved in pineal calcification, biological clock, neuro-en-docrinoimmunology, and free radical damage. MT is an endogenous free radical scavenger, may anto-gonize the attack of hydroxyl free radical ( ?OH)on organism and glutamate (Glu) excitotoxicity, and has a potent protective effect of central nervous system. In vivo studies showed that the food restriction and exogenous MT could obviously prolong life, postpone aging, and reduce the chances of age-related diseases. Investigating of MT anti-aging effect shows a vast prospect.

The mechanism of killer toxin is believed to relate to the inhibition of yeast cell wall ? glucan synthesis. Mannoprotein probably is one of the receptor for HM 1 killer toxin. The resistance is due to the decrease of N glycosylation of the sensitive yeast strain. HM 1 is a hydrophilic protein consisting of 88 amino acids. Two arginine residues located at positions 82 and 86 in the C terminal region of molecule are essential for the action of killer activity of HM 1 toxin. It is very useful to develop a novel anti fungal agent and prevent wild yeast contamination.

This article reviews the proteins and transduction pat hw ay in endotoxic action. Lipopolysaccharide-binding protein(LBP) binds and trans ports the LPS to its receptors, which include CD14 and CD11/CD18. Toll-like rec eptors(TLRs) is closely associated with transducting the signals into cytoplasm. Scavenger receptors are related to hepatic clearance on endotoxin .The intracel lular signal transduction is involved in several paths which finally leads to t he release of cytokines.

T-type calcium channels present in cardiovascular, neuronal and endocrine systems, and they are now receiving attention as novel therapeutic targets. It plays important roles in multiple cellular functions and genes those encode the T-type calcium channels have been recently reported. Many drugs and compounds non-specifically block T-type calcium channels. We review circumstances of the research of T- type calcium channels in the molecular structure, distribution, function, regulation and the related drugs.

The studies on pathophysiological mechanism and treatment method of spontaneous intracerebral hemorrhage mainly focus on animal experiment,which has been established various animal models in the laboratory.According to the different implanted tissues,there are four kinds of intracerebral hemorrhage,including ischemia,trauma,spontaneous or implanting intracal extraneous materials reduced intracerebral hemorrhage.Further more,the implanted extraneous materials contain inert substances-reduced intracerebral hemor-rhage,biological agent induced and autologous arterial blood simulated intracerebral hemorrhage.This paper summarizes the kinds,preparation methods and characteristics of each animal models of intracerebral hemorrhage.

Objective To observe the effects of intervention with Simvastatin and Aspirin on carotid artery atherosclerosis(CAA).Methods 120 patients with ischemic cerebrovascular disease and complicated CAA and blood-lipid abnormality were randomly divided into the Simvastatin group,Aspirin group,Simvastatin+ Aspirin group.Each group received corresponding therapy for 6 months.The changes of serum C-reactive protein(CRP) level,blood-lipid level,the carotid artery intimal and media thickness(IMT),the plaque areas before and after treatment and the recurrence rate of cerebrovascular event among the 3 groups were compared.Results Compared with before treatment,the levels of serum CRP were significantly decreased in the 3 groups after treatment(all P

The extraction of the fatty acids from viscera gland of Chlamys farreri and Pecten yesoensis cultured off shore Dalian was studied and the fatty acids in fat were analysis.The results show that extraction rate,3.01%,is the highest when gas(CO 2) is filled up to expel oxygen,the ratio of material to water is 1∶2,the time is 60 minuites and temperature is 100℃.The contents of the unsaturated fatty acids of viscera gland fatty acids in Chlamys farreri and Pecten yesoensis are 32.0% and 32.8% respectively,in which the contents of EPT+DHA are 13.6% and 13.8% respectively.