OBJECTIVETo compare the shear bond strength(SBS) of cast Co-Cr alloys and selective laser melting(SLM) Co-Cr alloys with those of dental porcelain.

METHODSA dental porcelain (Vita) was applied on cast and SLM Co-Cr alloy specimens (n = 10). SBS test was conducted, and fracture mode analysis was determined. Student's t-test by SPSS 13.0 software was employed to analyze the data.

RESULTSThe SLM Co-Cr alloy specimens had lower SBS values than the cast Co-Cr alloy specimens (P > 0.05). The metal-porcelain bond strength value of the cast group was (33.11 +/- 4.98) MPa, and that of the SLM group was (30.94 +/- 5.98) MPa. The specimens in both test groups exhibited mixed failure.

CONCLUSIONThe metal-porcelain system processed by SLM exhibit a bond strength that is similar to that of the cast group. This system also display a high precision.

This study was aimed to observe the effect ofJian-Zhong-Li-Lao(JZLL) decoction-mediated serum on the TGF-β1-induced proliferation of HBZY-1 cells, the expression of matrix metalloproteinases and its inhibitory enzyme, in order to investigate the mechanisms of JZLL decoction in treatment of the renal fibrosis of chronic renal failure. HBZY-1 cells were culturedin vitro. JZLL decoction-mediated serum was prepared. The experiment contained the blank control group, TGF-β1-induced group, control serum group, low-dose JZLL decoction group, high-dose JZLL decoction group, and theNiao-Du-Qinggroup. The cytotoxic effects of JZLL decoction-mediated serum on HBZY-1 cells were assessed by LDH assay. The morphology and proliferation of HBZY-1 cells were examined by CCK8 assay. The expression of matrix metalloproteinases (MMP-2, MMP-9) and its inhibitory enzymes (TIMP-1, TIMP-2) were examined by ELISA assay. The results showed that there was no cytotoxic effect of JZLL decoction-mediated serum on HBZY-1 cells (P > 0.05). Compared with the model group, JZLL decoction can obviously inhibit TGF-β1-induced proliferation of HBZY-1 cells (P < 0.05). JZLL decoction can obviously increase the expressions of MMP-2 and MMP-9 (P < 0.05), and inhibit the expressions of TIMP-1 and TIMP-2 (P < 0.05). It was concluded that JZLL decoction-mediated serum significantly inhibited TGF-β1-induced proliferation of HBZY-1 cells, relieved the renal fibrosis of chronic renal failure through affecting the expression of matrix metalloproteinases and its inhibitory enzymes.

Objective To investigate the impact of neoadjuvant chemotherapy on surgery and prognosis in patients with stage Ⅲ gastric cancer.Methods The 90 cases staging Ⅲ gastric cancer were randomly divided into neoadjuvant chemotherapy group and surgery group.Both surgical complications and prognosis were compared.Results The overall effective rate of neoadjuvant chemotherapy was 53％ (24/45),disease control rate of neoadjuvant chemotherapy was 91％ (41/45).Blood loss (t =4.102,P =0.037),local adhesions surgery (x2 =19.756,P =0.000),local tissue necrosis (x2 =13.512,P =0.000),tissue fragility (x2 =12.870,P =0.000) number of cases found in neoadjuvant chemotherapy group were higher than surgery group,and the data were statistically significant.There were no statistically significance between two groups about operation time (t =2.391,P =0.129),tissue congestion (x2 =0.865,P =0.352),postoperative bleeding(x2 =0.720,P =0.396),postoperative fistula (x2 =1.047,P =0.306).The survival time of neoadjuvant chemotherapy group was longer than surgery group,but it was not statistically significant(t =1.086,P =0.372).Conclusions Neoadjuvant chemotherapy could reduce the stage of the gastric cancer and increase the complexity of surgery.Thus preoperative evaluation should be prepared before the surgery.

Objective To observe tigecycline (TGC),minocycline (MH)and polymyxin B (PB)in vitro antibacterial activity of pan-resistant Acinetobacter baumannii (PDR-Ab)for clinical treatment,provide the basis for infection control.Methods Collected 76 patients’clinical specimens used for no repeat count of isolation and identification with pan-resistant Acineto-bacter baumannii in Shaanxi Provincial People’s Hospital from October 2013 to March 2013.Used tigecycline,minocycline and polymyxin B to do susceptibility testing with disk diffusion method (KB).Results 76 pan-resistant Acinetobacter bau-mannii ,sensitive to the rate for tigecycline and polymyxin B were 100% sensitivity rate of minocycline and intermediary rates were 67.11%,27.63%.Conclusion Tigecycline,minocycline and polymyxin B for the Pan-resistant Acinetobacter bau-mannii had good in vitro antibacterial activity.It provide a reference for clinical pan-resistant Acinetobacter baumannii infec-tions caused by diseases treatment.

Objective To study the effect of blood glucose level and duration of type 2 diabetes mellitus on carotid intima-media thickness (CIMT) and quantitative carotid stiffness (QCS) in the patients with type 2 diabetes mellitus. Methods Two hundred and seventy-four type 2 diabetic patients (diagnosed according to the World Health Organization criteria) were involved in this study. The subjects were divided into three groups according to the HbAlclevels and duration of diabetes mellitus: 60 with duration ≤2 years (as newly diagnosed) , 96 with duration≥5 years and HbAlc <6.5%, and 118 with duration≥5 years and HbAlc≥6.5%. CIMT and QCS of the common carotid artery were assessed by the high-resolution B-mode ultrasound unit and an echo-tracking system integrated in an uhrasound unit respectively. Results (1) In categorical analyses, the mean level of CIMT was increased from 720 μm in subjects with a duration of diabetes mellitus ≤2 years to 770 μm in subjects with a duration of diabetes mellitus > 2 years and plasma HbAlc< 6.5% (P < 0.05), and to 800 μm in subjects with a duration of diabetes mellitus > 5 years and plasma HbAlc≥ 6.5 % (P < 0.01). The corresponding values for Q CS values were 4.5, 4.5 and 5.1 (P <0.05), respectively. (2) In multiple stepwise regression analyses, CIMT wassignificantly associated with the duration of diabetes mellitus, systolic blood pressure and serum concentration of total cholesterol, whereas QCS was significantly associated with age, duration of diabetes mellitus, smoking, HbAlc, systolic blood pressure (P < 0.05 or P < 0.01). Conclusion QCS is suitable in evaluating the impact of blood glucose on carotid artery, while CIMT is an appropriate tool for long-term follow-up of diabetic patients.

Objective:To observe the effect of Lingshao-Zaoren Decoction on urodynamics and the expression of Piezo1 if overactive bladder (OAB) rats. Methods:Thirty SPF grade female SD rats were randomly divided into blank group, model group, Tolterodine control group, low-dose and high-dose Lingshao-Zaoren Decoction groups, with 6 rats in each group. The OAB rats were modeled by intraperitoneal injection of Cyclophosphamide. After the successful modeling, Tolterodine control group was given 0.36 mg/kg Tolterodine tartrate, the low-dose and high-dose Lingshao-Zaoren Decoction groups were given 1.59 and 3.18 g/kg Lingshao-Zaoren Mianjian granules by gavage, the blank group and model group were given the same amount of distilled water, once a day for 14 days. After 14 days, the urodynamics of rats in each group were detected. The bladder volume and maximum bladder pressure were observed respectively. The pathological changes of bladder tissue were observed by HE staining. The expression of Piezo1 protein in bladder tissue was detected by immunohistochemistry and Western blot. The expression of Piezo1 mRNA in bladder tissue was detected by qPCR. Results:Compared with the blank group, the body weight, bladder volume and maximum bladder pressure of the model group were significantly reduced ( P<0.01). HE staining result showed that the model group had hyperplasia of urinary tract epithelium, degeneration, necrosis and abscission of epithelial cells, infiltration of a large number of inflammatory cells in stroma, vascular proliferation, thickening of vascular wall, hyperplasia of mucosal smooth muscle, disorder of arrangement, and significant up regulation of Piezo1 protein expression ( P<0.01). Compared with the model group, the weight [(244.83 ± 6.05) g, (233.33 ± 11.76) g vs. (219.00 ± 9.70) g] of rats in the Tolterodine control group and high-dose group of Lingshao-Zaoren Decoction significantly increased ( P<0.01), and the bladder volume [(0.93 ± 0.31) ml, (1.17 ± 0.17) ml, (1.21 ± 0.23) ml vs. (0.50 ± 0.16) ml] and maximum bladder pressure [(42.00 ± 3.03) cmH 2O, (45.83 ± 7.19) cmH 2O, (46.83 ± 8.23) cmH 2O vs. (30.50 ± 5.47) cmH 2O] of rats in the Tolterodine control group, low-dose and high-dose Lingshao-Zaoren Decoction groups were significantly increased ( P<0.01); the bladder epithelial hyperplasia and degeneration degree, interstitial inflammatory cell infiltration degree and vascular hyperplasia degree of rats in the Tolterodine control group, low-dose and high-dose Lingshao-Zaoren Decoction groups significantly increased. The expression of Piezo1 mRNA (1.50 ± 0.04, 2.05 ± 0.08, 1.44 ± 0.10 vs. 2.56 ± 0.11) and protein in the Tolterodine control group, low-dose and high-dose Lingshao-Zaoren Decoction groups were significantly decreased ( P<0.01). Conclusion:Lingshao-Zaoren Decoction can increase the bladder volume and maximum bladder pressure of urinary incontinence caused by detrusor overactivity in rats with overactive bladder, which may be related to reduction of Piezo1 expression.

Objective:To investigate the infection status of Yersinia in the main host animals of plague in Xiahe and Luqu counties, the Himalayan marmot plague foci of Gansu Province, and to provide a basis for exploring the epidemic status of plague in these foci. Methods:Samples of the ileocecal region and contents, pharyngeal swabs (or tongue roots), and blood of the main host animals of plague in Xiahe County and Luqu County where the plague were active in the 1950s and 1960s were collected from 2014 to 2018. The Yersinia isolation, virulence determination and F1 antibody detection were performed, respectively. Results:Totally 24 strains of Yersinia were detected in 958 samples of ileocecal region and contents with a bacterial detection rate of 2.51%, which were 13 strains of Yersinia enterocolitia (Y.e), 1 strain of Yersinia kristensenii (Y.k), 2 strains of Yersinia frederiksenii/ intermedia (Y.f/i), 6 strains of Yersinia intermedia (Y.i), 1 strain of Yersinia aldouae (Y.a) and 1 strain of Yersinia massiliensis (Y.m). Totally 19 strains of Yersinia were detected in 958 samples of pharyngeal swabs (or tongue roots), and the detection rate was 1.98%, which were 8 strains of Y.e, 1 strain of Yersinia pseudotuberculosis (Y.p), 4 strains of Y.k, 1 strain of Y.f/i, 4 strains of Y.i, and 1 strain of Yersinia ruckeri (Y.r). The virulence types of 21 strains of Y.e were ail -ystA -ystB +yadA -virF -rfbc -, ail -ystA -ystB -yadA -virF -rfbc -, respectively, accounting for 9.52% (2/21) and 90.48% (19/21), none were pathogenic. The results of F1 antibody in 1 079 serum samples were all negative. Conclusions:Yersinia are widely found in the pharynx and intestines of the main host animals of plague in Xiahe and Luqu counties, and the Y.e detected are all non-pathogenic strains. The results of this investigation can provide clues for further study on the preservation of Yersinia pestis in host animals and their living environment.

Objective To compare the shear bond strength(SBS) of cast Co-Cr alloys and selective laser melting(SLM) Co-Cr alloys with those of dental porcelain. Methods A dental porcelain (Vita) was applied on cast and SLM Co-Cr alloy specimens(n=10). SBS test was conducted, and fracture mode analysis was determined. Student’s t-test by SPSS 13.0 soft- ware was employed to analyze the data. Results The SLM Co-Cr alloy specimens had lower SBS values than the cast Co-Cr alloy specimens (P>0.05). The metal-porcelain bond strength value of the cast group was (33.11±4.98) MPa, and that of the SLM group was (30.94±5.98) MPa. The specimens in both test groups exhibited mixed failure. Conclusion The metal-porcelain system processed by SLM exhibit a bond strength that is similar to that of the cast group. This system also display a high precision.

Objective:To explore the feasibility of early oral nutrition for gastric cancer patients after total gastrectomy based on propensity score matching.Methods:Using convenience sampling method, a retrospective analysis was conducted on the medical records of 755 patients who underwent total gastrectomy for gastric cancer at Jiangsu Subei People's Hospital from 2012 to 2020. A total of 454 patients who received early oral nutrition after surgery were included in the study group, while 301 patients who received conventional nutrition were included in the control group. The study group patients began eating orally on the first day after surgery, while the control group patients began eating orally after anal exhaust. The propensity score matching method was used to balance confounding factors between two groups.Results:A total of 203 pairs (406 cases) of patients were matched. After matching, there was no statistically significant difference in general data between the two groups ( P>0.05). The study group had lower dietary intake time, first anal exhaust time, hospital stay, incidence of abdominal infection, and incidence of anastomotic fistula compared to the control group, with statistically significant differences ( P<0.05) . Conclusions:Early oral nutrition for gastric cancer patients after total gastrectomy can promote intestinal function recovery, shorten hospital stay, and do not increase the risk of complications, including anastomotic fistula. It has the same acceptable tolerance as conventional nutrition, indicating that early oral nutrition after total gastrectomy is safe and feasible.

Objective To investigate the influence of single agent and combined medication chemotherapy on elderly patients with gastric cancer. Methods One hundred and twenty elderly inpatients with gastric cancer in the general surgery department of the Nanyang Municipal Central Hospital from January 2009 to October 2014 were divided into the single agent chemotherapy group (n=60) and combined medication chemotherapy group(n=60). The adverse reactions and survival time were compared between the two groups. Results The occurrence rates of nausea, vomiting, diarrhea, constipation, leukopenia, oral mucositis and peripheral neuropathy in the single agent group were lower than those in the combined chemotherapy group, the difference between the two groups was statistically significant (P<0.05) ; the occurrence rates of Hb decrease, thrombocytopenia and transaminase elevation in the single agent group were lower than those in the combined chemotherapy group,but the difference was not statistically significant(P>0. 05);the survival time in the combined chemotherapy group was longer than that in the single agent chemotherapy group,but the difference between them was not statistically significant(P>0.05). Conclusion Single agent chemotherapy may be considered as the first-line chemotherapy scheme for elderly patients with gastric cancer.