BACKGROUND:With the consumption of acidic beverages, dental erosion becomes more serious. Erosion is related to direct loss of dental hard tissue, and causes dental over-abrasion, thus great threatening the dental health.
OBJECTIVE:To review the research work on the erosion of human teeth, erosion prevention, and teeth remineralization.
METHODS:A computer-based online retrieval of CNKI, Elsevier and Wiley databases between 1990 and 2013 was performed for articles abut human teeth erosion, erosion prevention and teeth remineralization. After repeated or old literatures were excluded, 58 literatures were included in the analysis.
RESULTS AND CONCLUSION:Current studies on dental erosion included three aspects, firstly, clinical observation of the symptoms and cause of dental erosion;secondly, the erosiveness of common acidic agents;and thirdly, the prevention of dental erosion. Many researchers focused on the prevention of dental erosion. It was suggested that dental erosion could be prevented through adjusting and control ing oral environment, enhancing the erosiveness of acidic beverages, and increasing the anti-erosion capacity of teeth. It should be noted that tooth erosion and friction/wear often occur simultaneously in the mouth. Therefore, future research should pay attention to the interaction mechanism of erosion, friction and wear of human teeth.

Objective: To observe the effect of electroacupuncture (EA) combined with Stretta radiofrequency treatment on contents of motilin (MTL) and gastrin (GAS) in gastroesophageal reflux disease (GERD) patients.
Methods: A total of 90 eligible GERD cases were randomly allocated into three groups, 30 in each group. Patients in the EA group were treated with EA, patients in the radiofrequency group were treated with Stretta radiofrequency, and patients in the observation group were treated with EA combined with Stretta radiofrequency. Assessment was made after a course of treatment.
Results: The recovery, improvement and failure cases and total effective rate in the EAgroup were 2, 18, 10 and 67.7% respectively, versus 13, 13, 4 and 86.7% in the radiofrequency group and 20, 9, 1 and 96.7% in the observation group. The therapeutic efficacy in the observation group was significantly better than that in the other two groups (P<0.01). After treatment, symptom scores of regurgitation, heartburn and substernal burning pain in all three groups were significantly reduced (P<0.05); the reduction in the observation group was more significant than that inthe other two groups (P<0.05),and the reduction in the radiofrequency group was more significant than that in the EA group (P<0.05). After treatment, the contents of MTL and GAS in all three groups were increased; and the increase in the observation group was more significant than that in the other two groups (P<0.05).
Conclusion: EA combined with Stretta radiofrequency treatment can significantly improve the clinical effect of GERD patients, improve regurgitation, heartburn and substernal burning pain and increase the contents of MTL and GAS.

Objective To undertake a systematic review of the economic burden of diabetes in China.Methods Published literatures about the medical cost and economic burden of diabetes in China were searched for analyzing the methodologies and results.Results Altogether 374 articles were identified in the literatures.Review of the articles resulted in the identification of 40 of these that met all criteria.Cost of illness studies and hospitalization expenditure per admission comprised the largest source of the studies.Cost of illness approach,calculations from the national survey's data and the matching method were adopted in most researches and led to variations of result.Conclusions Differences in research methods are the key determinants of variations of the result.Even the same method with different data sources,patient types or investigating spots still contributes to great variations.Without well-accepted standards to guide researchers in their execution of these studies,policymakers and the general publicmust be wary of the methods and data source used in their calculation and subsequent results.

Objective To explore independent risk factors of ventilator associated pneumonia (VAP) on severe craniocerebral injury patients, and propose nursing intervention measures to reduce occurrence of VAP. Methods A retrospective analysis was conducted on 73 severe craniocerebral injury patients with VAP postoperatively from January 2013 to June 2015, and 80 severe craniocerebral injury patients underwent mechanical ventilation without VAP postoperatively at the same time were selected as the control group. Through literature review, questionnaire was designed to collect potential impact factors of VAP in both two groups, the single factor analysis and Logistic regression analysis were applied to explore the VAP independent risk factors, and nursing intervention countermeasures were proposed to improve VAP clinical prevention. Results VAP incidence rate of severe craniocerebral injury patients postoperatively was 23.0%(73/317) , from which 81 strains were detected, the first three strains of strain spectrum were Klebsiella pneumonia (21.0% ), Bauman Acinetobacter (17.3% ) and pseudomonas aeruginosa bacteria (14.8% ). Single factor analysis showed there were significant differences on composition of two groups in age, preoperative Glasgow Coma Scale (GCS) score, operation times, artificial airway type, postoperative mechanical ventilation time, daily airway humidification frequency, daily sputum suction frequency compound injury, daily oral care times (χ2=1.809-11.936, P < 0.01 or 0.05). Logistic regression models showed duration of mechanical ventilation (OR≥7d=3.013; OR≥14d=3.695), secondary surgery (OR =3.111) , preoperative GCS score (OR =2.989), daily airway humidification frequence (OR =2.280), age (OR=2.237) had remarkable influence on occurrence of postoperative VAP (P<0.01 or 0.05). Conclusions The incidence rate of VAP in severe craniocerebral injury patients is higher, age, mechanical ventilation duration, preoperative GCS score, airway humidification degree, second surgery are the independent risk factors of VAP.

AIM: To examine the inhibition of matrix metalloproteinase (MMP) activity by doxycycline (Doxy) and its effect on vascular smooth muscle cells (SMCs) proliferation, neointimal hyperplasia and vascular remodeling. METHODS: The model of rat common carotid artery injury was established by balloon-dilatation. Doxy was administered to the animals of treatment group at dose of 30 mg?kg -1?d -1. The activity of MMPs in the tissue of injured carotid arteries was measured by gelatin zymography. The thickness and area of neointimal, lumen area and the proliferation of SMCs were measured by histological and morphometric analysis. RESULTS: 1. After Doxy treatment, the activity of MMP-9 in the carotid arteries was reduced by 26.3% and 34.5% compared to that in rats without Doxy treatment at 24 hours and 3 days after balloon injury, respectively (P

Objective To detect the levels of IL-9,IL-17,and IFN-γ in CD4+T cells from patients with rheumatoid arthritis (RA).Methods The peripheral blood mononuclear cells (PBMCs) from patients with RA and healthy controls were obtained,then the CD4+ T lymphocytes were tested by immunomagnetic beads.The protein levels of IL-9,IFN-γ and IL-17 were measured by flow cytometry (FCM).The mRNA levels of IL-9,IL-17,RORγt and IFN-γwere also detected by qRT-PCR.Data were analyzed by comparison between groups using variance analysis,and Pearson's correlation analysis was used for linear correlation analysis.Results The isolation of untouched human CD4+ T cells from PBMC was effective and its purity was over 90％.The protein levels of IL-9,IL-17,IFN-γwere higher in patients with active RA as compared with patients with inactive RA (P＜0.01) which were (1.62±0.23)％ vs (1.15±0.24)％(P＜0.01),(1.47±0.20)％ vs (1.04±0.26)％(P＜0.01) and (8.1±0.6)％ vs (6.9±1.0)％(P＜0.01) respectively,so did the patients with RA when compared with healthy controls (P＜0.01).The mRNA levels of IL-9,IL-17,RORγt and IFN-γ were higher in patients with active RA as compared with inactive RA patients (P＜0.01),which were (3.0±0.6) vs (1.8±0.4) (p＜0.01) (4.2±0.9)vs (2.3±0.7) (P＜0.01),(4.1±0.7)vs (2.9±0.3) (P＜0.01)and (4.0±0.8)vs (2.3±0.6) (P＜0.01) respectively,so did the patients with RA when compared with healthy controls (P＜0.01).Intracelluar IL-9 levels were positively correlated with IL-17 (r=0.632,P=0.001),IFN-γ (r=0.515,P=0.008),DAS28 (r=0.519,P=0.009) and ESR (r=0.857,P=0.038) but had no correlation with CRP (r=0.38,P=0.61).Conclusion The levels of IL-17,IL-9,IFN-γare higher in the PBMCs of RA patients,and these cytokines may participate in the pathogenesis of RA.

Objective To explore whether apply selective perineal skin preparation or not is feasible for patients with coronary heart disease (CHD) before percutaneous coronary intervention (PCI).Methods Divided patients with CHD before PCI into the experimental group (801 cases) and the control group(798 cases) according to the hospital number.Selective perineal skin preparation was used in the experimental group,while the right forearm skin preparation was used in all the patients in the control group.The rate of skin preparation and the care hours in the two groups were compared.Results The care hours of skin preparation in the experimental group was (5.58±0.30) h,which was significant shorter than that in the control group,(66.50±1.50) h,t=-1127.03,P＜0.05.Conclusions Before PCI,for patients with CHD,applying selective perineal skin preparation is feasible.It can not only reduce care labor,decrease nursing costs,but also relieve nurse-patient psychological pressure,cut back patients' expenses;and without percutaneous entrance infection.

Humans ; Purpura, Thrombotic Thrombocytopenic ; diagnosis ; therapy

Adult ; Altitude ; Case-Control Studies ; Humans ; Immunoglobulins ; blood ; Occupational Exposure ; T-Lymphocyte Subsets ; immunology

With the quick development and the requirements of internationalization of China's higher education,bilingual education has become a teaching task which is actively carried out in universities.Basic medical courses has strong professional and high abstractive characteristics.The bilingual education of basic medical courses have special requirements.Problems of bilingual education in basic medical courses teaching and possibly solutions were discussed to help better understanding of the bilingual teaching of basic medical courses and exert its advantages.