BACKGROUNDCurrently, several systems of dentin substrate-reacting adhesives are available for use in the restorative treatment against caries. However, the bond effectiveness and property of different adhesive systems to caries-affected dentin are not fully understood. The objective of this study was to evaluate the bond strength of different adhesives to both normal dentin (ND) and caries-affected dentin (CAD) and to analyze the dentin/adhesive interfacial characteristics.

METHODSTwenty eight extracted human molars with coronal medium carious lesions were randomly assigned to four groups according to adhesives used. ND and CAD were bonded with etch-and-rinse adhesive Adper Single Bond 2 (SB2) or self-etching adhesives Clearfil SE Bond (CSE), Clearfil S(3) Bond (CS3), iBond GI (IB). Rectangular sticks of resin-dentin bonded interfaces 0.9 mm(2) were obtained. The specimens were subjected to microtensile bond strength (microTBS) testing at a crosshead speed of 1 mm/min. Mean microTBS was statistically analyzed with analysis of variance (ANOVA) and Student-Newman-Keuls tests. Interfacial morphologies were analyzed by Scanning Electron Microscopy (SEM).

RESULTSEtch-and-rinse adhesive Adper(TM) Single Bond 2 yielded high bond strength when applied to both normal and caries-affected dentin. The two-step self-etching adhesive Clearfil SE Bond generated the highest bond strength to ND among all adhesives tested but a significantly reduced strength when applied to CAD. For the one-step self-etching adhesives, Clearfil S(3) Bond and iBond GI, the bond strength was relatively low regardless of the dentin type. SEM interfacial analysis revealed that hybrid layers were thicker with poorer resin tag formation and less resin-filled lateral branches in the CAD than in the ND for all the adhesives tested.

CONCLUSIONThe etch-and-rinse adhesive performed more effectively to caries-affected dentin than the self-etching adhesives.

Adhesives ; Dental Bonding ; methods ; Dentin ; Humans ; Microscopy, Electron, Scanning ; Molar ; Tensile Strength

The cultivation of research ability can promote eight-year medical students to explore the uncharted academic fields and solve complex clinical problems. One of the firts pilot universities to provide eight-year programs, Xiangya Medical College of Central South University builds on its profound experience in medical education, and establishes a curriculum structure aiming at improving the students' research ability. In the general education stage, cross-disciplinary courses are set up. In the core medical education stage, basic medical innovation experiment extracurricular research courses are set up, and a two-year overseas exchange program is set up in the postgraduate training stage. Different evaluation methods are also designed to meet the specific needs in each stage. This program has achieved preliminary effects.

OBJECTIVETo isolate and identify the chemical constituents of Shuanghuanglian injection.

METHODSChromatography and spectral analysis were performed to isolate and identify the chemical constituents respectively.

RESULTS AND CONCLUSIONSeven compounds were isolated from Shuanghuanglian injection, including chlorogenic acid (I), caffeic acid (II), chrysophanol (III), physcion (IV), rutin (V), baicalein (VI) and glucose (VII). The compounds III, IV, V and VII were isolated and identified in Shuanghuanglian injection for the first time.

Caffeic Acids ; chemistry ; isolation & purification ; Chlorogenic Acid ; chemistry ; isolation & purification ; Chromatography, High Pressure Liquid ; Drug Combinations ; Drugs, Chinese Herbal ; chemistry ; Flavanones ; chemistry ; isolation & purification ; Injections ; Molecular Structure

OBJECTIVETo describe the changes of health related behavior and influencing factor during and after the prevalence of severe acute respiratory syndrome (SARS), as to providing evidence for inducing public health related behavior to cope with the emergent infectious public health hazards.

METHODSAccording to the epidemic strength of SARS, Guangzhou, Taiyuan, Hangzhou were selected to be the research areas, and convenience sampling was used to identify 200 city residents, 200 country residents and 400 occupational populations from each area. The uniform and self-made questionnaire was carried out by about 2400 residents.

RESULTSAll 2424 subjects completed the questionnaire. The correlation coefficient of scores of health related behavior during and after SARS was 0.782 (P < 0.01). And 39.3% subjects were considered as under the health risked stress by CPSS. Multiple linear regression indicated that the scores of health related behavior were significantly related to the perceived stress, demographic characteristics and recognition of SARS.

CONCLUSIONSThe public health related behavior should be developing in the SARS, and part of health related behavior had been kept after SARS and part been decreased. Behavior change should depends on the prevalence of the disease, cultural heritage and behavior variability. More attention should be paid to induce the public psychology and behavior and enhance the degree of recognition on related knowledge through health education as to relieving the stress in populations when we conduct to cope with the emergent public health hazards.

Adult ; Female ; Health Behavior ; Health Education ; Health Knowledge, Attitudes, Practice ; Humans ; Male ; Middle Aged ; Risk ; Rural Population ; Sampling Studies ; Severe Acute Respiratory Syndrome ; epidemiology ; Surveys and Questionnaires ; Urban Population

OBJECTIVEThe National Institutes of Health (NIH) category IIIa chronic prostatitis syndromes (non bacterial chronic prostatitis) were common disorders but with few effective therapies. Alpha-blockers and bioflavonoids had recently been reported in randomized controlled trials to improve the symptom of these disorders in a significant proportion of men. The aim of this study was to confirm these findings in a prospective randomized, placebo-controlled trial.

METHODSForty-five men with category IIIa chronic non bacterial protatitis were randomized into three groups as follows: (1) placebo; (2) phenoxybenzamine-hydrochloride:10 mg two times a day for one month; (3) flavoxate HCI-neptumus: 200 mg three times a day for one month. The NIH chronic prostatitis symptom score was used to grade symptoms at the beginning and conclusion of the study.

RESULTSAll the patients in three groups completed the study except three dropout patients in placebo group because of sever symptoms. The three groups were similar in age, duration of symptoms and initial symptom score. Patients taking placebo had a mean improvement in NIH-CPSI from 21.85 to 19.55 (not significant), while the phenoxybenzamine-hydrochloride group had a mean improvement from 21.95 to 13.75 (P < 0.01), and those taking flavoxate HCI-neptumus had a mean improvement from 21.75 to 16.95 (P < 0.05). The decrease in NIH-CPSI was associated with significant improvement in patients' clinical manifestations.

CONCLUSIONTherapy with alpha-blockers was well tolerated with significant symptomatic improvement in most men having chronic non-bacterial chronic protatitis while the bioflavonoids group had no significant improvement. Mechanism of both medicines needs further study.

Adrenergic alpha-Antagonists ; administration & dosage ; therapeutic use ; Adult ; Chronic Disease ; Flavonoids ; administration & dosage ; therapeutic use ; Flavoxate ; therapeutic use ; Humans ; Male ; Parasympatholytics ; therapeutic use ; Prospective Studies ; Prostatitis ; drug therapy ; Treatment Outcome

OBJECTIVETo find out the perceived stress in general public during prevalence of severe acute respiratory syndrome (SARS) and its impact on health behavior.

METHODSA retrospective survey was conducted in Guangzhou, Hangzhou, and Taiyuan according to the epidemic situations of SARS, and 2532 subjects were randomly selected from constructive industry, school, and commercial business and residents in urban and rural areas. The perceive stress was measured by Chinese perceived stress scale (CPSS), and health related behavior during SARS was tested by uniform and self-made questionnaire. EpiData 2.0 was used for data management and CPSS value was calculated according to answer to 14 questions contained in the scale. Health risk stress among different population group and health related behavior among low, medium and high stress state were analyzed by SPSS 11.5.

RESULTS2424 subjects were involved in the survey. The CPSS value was measured from 0 - 49 (22.7 +/- 6.8), M = 24.0. 39.3% (953/2379) subjects were under the health risk stress. The health related behaviors such as washing hands, opening the window for air, keeping away from others when cough and sneeze, doing exercises etc were reduced with the stress increased. Logistic regression indicated that compared with the persons with the thoughts of nothing serious of SARS, without any dread of SARS, and knowing nothing about prevention of SARS, the perceived stress was significantly related with perceiving of the thread to certain extent (beta = 0.41, Wald chi(2) = 4.84, P = 0.03), worrying little about the epidemic (beta = 0.50, Wald chi(2) = 6.69, P = 0.01), worrying about it to certain extent (beta = 1.39, Wald chi(2) = 48.59, P = 0.00) and scared so much (beta = 1.77, Wald chi(2) = 53.59, P = 0.00), and knowing little about the prevention (beta = 0.74, Wald chi(2) = 4.48, P = 0.03), knowing something about prevention (beta = -0.98, Wald chi(2) = 8.29, P = 0.00) and knowing the prevention very well (beta = -1.18, Wald chi(2) = 10.66, P = 0.00).

CONCLUSIONThe adoption of health related behaviors declined with increase of perceived stress. Opening connection to authority and government, enhancing the awareness of outburst affairs among general public and providing positive social support may be effective ways to reduce the population perceived stress.

Adolescent ; Adult ; Aged ; Culture ; Female ; Health Behavior ; Humans ; Middle Aged ; Occupations ; Retrospective Studies ; Rural Population ; Severe Acute Respiratory Syndrome ; epidemiology ; prevention & control ; psychology ; Social Perception ; Surveys and Questionnaires ; Urban Population ; Young Adult

microRNAs are one kind of endogenous no-encoding RNA with about 22 nucleotides in length, and inhibited the translation of mRNAs by partially complementary binding to the 3' UTR of target mRNAs in the post-transcriptional level. Recent research shows that miRNAs function in the physiological and pathological processes of heart, especially involved in the occurrence and progress of arrhythmias. Abnormal miRNAs alters the protein expression of ion channels, causes the cardiac dysfunction, and triggers heart arrhythmias. The article summarized recent advances about roles of miRNA in arrhythmias and related cardiomyopathy, and discussed the therapeutic potential of miRNAs for heart diseases.
Arrhythmias, Cardiac ; genetics ; metabolism ; Cardiomyopathies ; genetics ; metabolism ; Humans ; MicroRNAs ; genetics ; metabolism

Recent randomized controlled clinical trials in Africa have demonstrated that adult male circumcision (MC) efficiently decreases the rate of HIV, HPV and HSV-2 infections. Many studies have clearly shown that MC is a simple, safe, and cost-effective method for the prevention of sexually transmitted diseases and urinary tract infection, and for improving genital hygiene. While a 30% MC prevalence exists worldwide, only 5% or less of the Chinese males have undergone circumcision. In this review, we report recent trends in international MC and HIV prevention efforts, as well as the potential benefits and importance of promoting MC in China. We appeal to medical and public health authorities to pay close attention to the international experience in MC and HIV prevention.
Circumcision, Male ; HIV Infections ; prevention & control ; Humans ; Male ; Reproductive Medicine ; Sexually Transmitted Diseases ; prevention & control

BACKGROUNDUnplanned extubation is associated with adverse outcomes in intensive care unit. The massive burn patient differs from other critically ill patients in many ways. However, little is known about the unplanned decannulation (UD) in Burn Intensive Care Unit. This paper describes the special features of the circumstances and outcome of UD of tracheotomy tube in massive burn patients.

METHODSA case series study was performed between January 1999 and December 2008 and UD of tracheotomy tube was analyzed retrospectively. A total of 21 patients with 29 UD events were identified. Demographic data, diagnosis, intervention, UD events and outcome of UD patients were collected. Differences in proportions were compared using the chi-square (χ(2)) or Fisher's exact test.

RESULTSPatients with UD were often burned with head and neck (67%) and combined with inhalation injury (62%). The majority of them (76%) were transferred patients, occurred early (55%) and were accidental UD (79%). UD events tended to happen in day shift (90%) and to be associated with the medical procedure that was performing by caregivers at besides (79%). Loose of the stabilizing rope, medical procedure and tracheotomy malposition were the main causes of UD. Early UD and reintubation failure were associated with patients' death.

CONCLUSIONSUD happened to massive burn patients can lead to patient death. Careful management of respiratory tract was essential for massive burn patients.

Adult ; Burns ; mortality ; surgery ; Device Removal ; adverse effects ; mortality ; Female ; Humans ; Intensive Care Units ; statistics & numerical data ; Intubation, Intratracheal ; Male ; Middle Aged ; Retrospective Studies ; Tracheotomy ; adverse effects

Although HIV is a significant problem in Africa, HIV infection rates are rising rapidly in other regions such as Asia and South America. International health organizations have recognized the need to develop effective strategies to check the worldwide transmission of HIV. Studies have demonstrated the significant reduction of HIV, HPV, HSV-2 and other STD infection rates with male circumcision (MC). Although numerous MC techniques are available, there are no standardized protocols and surgical training programs. Studies have shown that the standardization of MC techniques coupled with training programs can significantly reduce complication rates. High complication rates have been a primary obstacle to the implementation of MC services. We recommend the establishment of surgical standards and training protocols prior to the promotion of MC services in China.
China ; Circumcision, Male ; standards ; HIV Infections ; prevention & control ; Humans ; Male