Objective:To investigate the effects of oxidation of titanium on bonding strength of titanium and porcelain. Methods: 24 specimens with a size of 28 mm ?3 mm?0.5 mm were cast from pure titanium and divided into 4 groups, 6 specimens each group. Group 2, 3 and 4 were degassed at 750, 800 and 900 ℃ respectively, group 1 not degassed as negative control, then a uniform thickness of 1mm of Noritake super porcelain Ti-22 was veneered on 8 mm?3 mm in the central portion of each specimen. The specimens were subjected to a three-point bending test on a load-test machine with a span of 20 mm, and the failure loads were recorded and analyzed statistically. The opposite side of specimens of each group were observed by thin-film X-ray diffraction. Results: The failure loads (N) of group 1, 2, 3 and 4 were 10.33, 9.98, 5.53, 3.37. The oxide of group 1 was Ti6O only, the oxide of the gropu 2, 3, and 4 were Ti6O and TiO2 and the amount of TiO2 increased significantly as the temperature iss increasing. Conclusion: The oxide adherence strength value for pure titanium decreased while the oxide temperature is increasing. The higher of the degassed temperature of the specimens, the more TiO2 can be found in the oxide film and the smaller the failure load is, which indicats that oxidation of titanium has a negative effect on the bonding strength of porcelain and titanium.

0.05),while there was significant difference among other groups(P

0.05 ;Ti milled/VITA vs Ni Cr/VITA P

Objective To observe the effects of chronic arsenic exposure on mRNA expression of estrogen receptor-binding fragment-associated gene 9 (Ebag9) and estrogen-responsive finger protein (efp) in uterus and ovary of female rats.Methods Fifty female Wistar rats were randomly divided into five groups according to arsenic (As2O3) concentrations given through drinking-water:0.00 (control),0.05,0.10,0.20,0.40 mg/L arsenic exposure groups and real-time RCR (RT-PCR) was used to detect the mRNA expression of Ebag9 and efp in uterus and ovary tissue at the 31 weeks of experiment.Results The mRNA expression levels of Ebag9 and efp of the 0.00,0.05,0.10,0.20,0.40 mg/L arsenic exposure groups were respectively as follows:0.761 ± 0.178,0.521 ± 0.130,0.544 ± 0.035,0.525 ± 0.198,0.498 ± 0.240 and 0.795 ± 0.171,0.874 ± 0.077,0.797 ± 0.066,0.796 ± 0.040,0.832 ± 0.096.Compared with control group,a decreased tendency was observed in Ebag9 mRNA level(with P value 0.055 in 0.40 mg/L arsenic exposure group) and increased tendency in efp mRNA level in experimental groups (all P ＞ 0.05).The mRNA expression levels of Ebag9 and efp in ovary of the five groups were by turns:0.702 ± 0.484,0.719 ± 0.336,0.693 ± 0.095,0.706 ± 0.055,0.728 ± 0.073 and 0.924 ± 0.061,1.009 ± 0.034,0.930 ± 0.085,0.929 ± 0.068,1.012 ± 0.101.Compared with control group,the expression level of Ebag9 mRNA showed a increased tendency in 0.05,0.20,0.40 mg/L arsenic exposure groups(all P ＞ 0.05).The efp mRNA level increased in experimental groups,with significant difference in 0.05,0.40 mg/L groups (all P ＜ 0.05).Conclusions The expression of efp mRNA has changed in ovary of female rats exposed to chronic arsenic.Arsenic may act as an environmental endocrine disruptor to exert its effect.

Objective Minimally invasive technique was used in the treatment of pectus carinatum. Indication, techni-cal details and perioperative complication are discussed in this paper. Methods From March 2008 to January 2009, 6 patients with pectus carinatum underwent minimal invasive operation by using the principle of Nuss procedure in which pressure applied through a curved steel bar that was placed subcutaneously anterior to the sternum, via lateral thoracic incisions. Preoperative CT scan were performed and Hailer index was used as operative indication. Results The average age of patients was (13.6 ± 1.94) years (range, 10 - 16 years). They were all males. The mean operation time was (104.17 ± 15.63) minutes. The av-erage blood loss was (5.17±2.56) ml. The mean hospital stay was (5.67±0.82) days. Postoperative follow-up was 1 -11 months. Displacement of the stablizer was the only complication that was corrected by further fixation procedure. COnClusion The minimally invasive technique for the treatment of peetus earinatum is safe and effective with minimal complications. It can be selected as an alternative techniques and the appropriate age for this procedure is 10-16 years.

Objective: To investigate the association between the CYP3A5 genetic polymorphism and the serum concentrations of carbamazepine (CBZ), to provide guidance for individualized drug dosing. Methods: Eighty-four epilepsy patients taking CBZ were included in this study. Their clinical data were recorded and CBZ serum concentrations were measured. The CYP3A5 6986 genetic polymorphism was assessed using a polymerase chain reaction-restriction fragment length polymorphism (PCRRFLP) assay. Patients were divided according to genotype into CYP3A5 expressor (CYP3A5*1/*1 genotype and CYP3A5*1/*3 genotypes) and non-expressor groups (CYP3A5*3/*3). The two groups were compared for the total dose of CBZ, dose of CBZ/kg body weight, serum drug concentration, dose-corrected serum concentration, and standardized serum concentration. Results: The total dose of CBZ and the dose of CBZ/kg body weight was higher in the CYP3A5 expressor group than the non-expressor (P = 0.043 and P = 0.014, respectively). The dose-corrected and standardized serum concentrations were lower in the CYP3A5 expressor group than the non-expressor (P = 0.001 and P < 0.001, respectively). There was however, no signifi cant difference in serum drug concentration between the two groups (P = 0.487). Conclusions: There was a close relationship between CYP3A5 genetic polymorphism and the serum concentrations of carbamazepine.

Objective To understand the effect of health management to enhance the community hypertensive patients' self-efficacy. Method With the method of stratified random sampling, 347 patients who come from communities were diagnosed as hypertension were selected as research subjects from the range of Yingze in Taiyuan of Shanxi province. There were 191 males and 156 females, the age ranged from 38 to 72 (55.90±9.60) years. The self efficacy promotion plan was conducted on high blood pressure patients. A comparison before and after six months of health management was made among the self efficacy scores, daily life scores, health behavior scores, drug behavior scores, medical compliance behavior scores by using self-efficacy scale. Excel 2007 and SPSS 19.0 were used for data analyses. Result Before the implementation of health management, the self efficacy scores of research subjects were 26.96 ± 0.77. After the implementation of health management, the value increased to 29.51 ± 0.86 (t=-41.23, P<0.05). In four dimensions, daily life (before and after management 6.85 ± 0.20 and 7.49 ± 0.31, t=-40.66), drug behaviors (before and after management 7.52 ± 0.21 vs. 7.98 ± 0.23, t=-26.93) and medical compliance behavior scores (before and after management 5.26±0.15 vs. 6.78±0.19, t=-115.97) were higher than those before the health management except health behaviors (before and after management 7.25 ± 0.40 vs. 7.26 ± 0.40, t=-1.94, P<0.05). Conclusion Health management regulated the self care behavior of patients with hypertension, improved the patients' compliance and enhanced self efficacy, which played an important role in controlling the development of disease.

OBJECTIVE:To interpret the contribution of Sun Simiao Qianjin Yi Fang to herbalism. METHODS:Using“Sun Simiao”“Qianjin Yi Fang”“herbalism”and other words as key words,related literatures were retrieved from CNKI,Wanfang,Dayi Yixue database and so on during 1983-2015;four aspects explained in Qianjin Yi Fang by Sun Simiao were summarized,involving“herb gathering season ranking the first”“nomen proprium ranking the second”“herb source ranking the third”and“prescription rank-ing the forth”. RESULTS & CONCLUSIONS:More than 50 literatures were collected,including 14 effective literatures. It is the quintessence of precious experience that herbalism is placed in the front of Sun Simiao Qianjin Yi Fang,which greatly contributes to herbalism.“Herb gathering season ranking the first”is the true essence of herb quality guarantee;“nomen proprium ranking the second”guarantees accurate use of herb in the clinic fundamentally;“herb source ranking the third”lays the foundation of therapeu-tic efficacy;“prescription ranking the forth”creates a new era of herb classification by functions.

Objective Base on the local pathology, the early diagnosis and a reasonable treatment for congenital esophageal stenosis (CES) were discussed. Methods Forty two cases of congenital esophageal stenosis during 1980～2000 were reviewed retrospectively, including age, vomitus and frequency, nutrition and development, diagnostic method used and operative pathological findings, time of normal feeding and time of nutritional restoration. Results According to local pathology, there were 26 cases of tracheobronchial remnant, 11 fibromuscular stenosis, 3 membranous diaphragm, and 2 ectopic gastric mucosa. Membranous diaphragm excision gave the best result without postoperative dilatation. The patients were followed up for 4～10 years, Normal feeding was restored in 1 month in 78 6%, 9 5% in 6 months, and 11 9% in 1 year. Conclusion Persistent vomiting of undigested food and failure in gaining weight are the chief complaints of congenital esophageal stenosis. The confirmatory diagnosis depends on barium swallowing and esophagoscopy. A good result can be achieved by follows local resection and necessary postoperative dilatation.

Objective To detect thyroid hormone receptors (TRs) mRNA expression of subjects exposed to different levels of arsenic,to further study the endocrine disturbing effect of arsenic.Methods Molecular epidemiological method was used,in drinking water type of endemic arsenic poisoning areas,which were divided into control (＜ 10 μg/L),low (10-＜ 100 μg/L),medium (100-＜ 200 μg/L) and high (≥200 μg/L) dose groups based on the drinking water arsenic concentrations.According to the gender stratification,a total of 273 (control,low,medium and high dose groups were 58,49,66,100,respectively) residents were chosen.To carry out the questionnaire,urine arsenic determination,electrocardiographic examination.Real-time PCR was used to detect blood TRs mRNA expression.Results TRα mRNA relative expression levels in the control,low,medium and high dose groups were (12.2 ± 5.7) × 10-4,(12.2 ± 5.0) × 10-4,(12.3 ± 5.4) × 10-4,(12.2 ± 4.3) × 10-4,respectively,the differences were not statistically significant (F =0.109,P ＞ 0.05).TRβ mRNA relative expression levels were all low,the control,low,medium and high dose groups were (5.7 ± 4.1) × 10-6,(8.6 ± 7.6) × 10-6,(6.3 ± 4.2) × 10-6 and (6.2 ± 3.8) ×10~,respectively,the differences were statistically significant (F =2.938,P ＜ 0.05).The levels of TRβ mRNA relative expression changed with increased content of arsenic in water and urine trends in inverse U-shaped curves (R2 =0.035,0.067,all P ＜ 0.05).TRβ mRNA relative expression in low dose group was higher than that in control group,the difference was statistically significant (P ＜ 0.05);TRβ mRNA relative expression in high dose group was lower than that in low dose group,the difference was statistically significant (P ＜ 0.05).Arsenic induced arrhythmia which most displayed sinus bradycardia;the prevalence of arrhythmia in the control,low,medium and high dose groups were 12.1％ (7/58),10.2％ (5/49),13.6％ (9/66),19.4％ (19/98),respectively,the differences were not statistically significant (x2 =2.877,P＞ 0.05).Heart rate was positively associated with the level of TRβ mRNA relative expression in lg value (r =0.218,P ＜ 0.05).Conclusion Chronic arsenic exposure can disturb TRβ mRNA expression;there is a possible relationship between TRβ mRNA abnormal expression and arrhythmia caused by arsenic.