Objective To compare the clinical effects of four kinds of gingival retraction technique in treat-ment of anterior teeth restoration.Methods 169 patients for 352 teeth with tooth body and tooth dentition defect by anterior crown bridge repair were chosen and divided into 4 group by patients'order,including A group(88cases)with single track method,B group(91cases)with single line for two times method,C group(89cases)with double line method and D group(94cases)with double line for two times method.And the fixed restoration satisfaction rate of anterior teeth of both groups was compared.Results The satisfaction rates of gums,shoulder,impression,model and restoration of A group were 73.9%,70.1%,69.3%,65.9%,61.4% respectively,which of B group were 83.5%, 80.2%,80.2%,80.2%,76.9%;which of C group were 84.3%,80.9%,78.7%,77.5%,76.4%;which of D group were 94.6%,93.6%,92.6%,92.6%,90.4%.There were no significant differences in the fixed restoration satisfaction rate of anterior teeth between B group and C group(χ2 =2.43,1.17,2.85,3.04,2.30,all P >0.05). The fixed restoration satisfaction rate of anterior teeth of D group were significantly better than A,B and C groups (χ2 =14.90,16.39,15.83,19.87,21.38,all P <0.05 ).Conclusion Double line for two times method in the treatment of anterior teeth restoration can efficiently avoid ree gingival damage in the situation with abutment shoulder preparation,improve the quality of preparation,impression and model,and are helpful to higher the fitness of the neck of anterior teeth fixed restorations.

To investigate whether the use of concentrate growth factors have a favorable impact on clinical outcome of immediate implant in periodontally infected sites.48 patients with 51 teeth with periodontitis and periapical periodontitis accepted immediate implantation in the maxillary esthetic zone.25 implants(test group) were placed simultaneously with guided bone regeneration (GBR) using CGF combined with Bio-oss, other 26 implants(control group) were treated with Bio-oss alone.The facial bone thickness at 0, 4 and 8mm apical to the implant platform were measured immediately after, 3 months after and 6 months after surgery;pain visual analogue scale (VAS) was used to assess the degreeof pain in the patient within 1 week after surgery.3 months after surgery,the change of horizontal resorption in labial was less in test group(P<0.05).In the first three days postsurgery, the test group reported significantly less pain with respect to the control group(P<0.05).The application of CGF produced beneficial impacts on clinical outcome of immediate implant in periodontally infected sites.

Objective To establish a method for rapid determination of chlorinated benzene compounds in drinking water.Methods Chlorinated benzene compounds were extracted by purge-and-trap and separated by GC then determined by MS.Results The correlation coefficients of 6 chlorinated benzene compounds were 0.999 1-0.999 8 and the average rates of recovery were 93.0%-97.5%(n=6).The relative standard deviation was 2.45%-4.36%(n=6) and limit of detection 0.007-0.05 ?g/L.Conclusion The method established in the present paper is simple,precious,accuracy and sensitive and applicable to the determination of chlorinated benzene compounds in water.

Objective To assess the value of enhanced multislice spiral CT (MSCT) scan using fat-dense enema for the staging of colorectal carcinoma.Methods 33 cases with colorectal carcinoma confirmed by colonoscopy were examined by enhanced MSCT scan ,from the dome of the diaphragm to symphysis pubica,after bowel cleaning,administration of smooth muscle relaxant, and rectal fat-dense contrast agent insuffation .Carcinomas were staged with TNM by axial,multiplannar reconstruction(MPR) and CT virtual endoscopy (CTVE) images. The staging results on CT were compared with that of postoperative pathological examination in all cases.Results All the 33 colorectal carcinoma were demonstrated clearly by MSCT ,the total accurate rate in staging with the TNM classification was 78.78%.The sensitivity and positive accurate values for T staging were 100%and 87.88%(29/33),respectively. The sensitivity and positive accurate values for in detecting lymph node involvement were 86.36%(19/22)and 68.18%(15/22), respectively. Five cases in M stage were all diagnosed correctly. Conclusion Using fat-dense contrast medium and enhanced multislice spiral CT is of very important value in staging of colorectal carcinoma.

Aged ; Diabetes Mellitus, Type 2 ; therapy ; Humans ; Walking

OBJECTIVE:To systematically review the efficacy and safety of lamivudine(LAM)combined with adefovir dipiv-oxil (ADV) versus entecavir (ETV)alone in the treatment of decompensated HBV-associated cirrhosis. METHODS:Retrieved from PubMed,Cochrane Library,CBM,CNKI,VIP and WangFang Database, randomized controlled trails (RCT) about LAM combined with ADV(combination group)versus ETV(control group)in the treatment of decompensated HBV-associated cirrhosis were collected. Meta-analysis was performed by using Stata 11.0 software after data extraction and quality evaluation. RESULTS:Totally 13 RCTs were included,involving 972 patients. Results of Meta-analysis showed,there were no significant differences in the serum alanine transaminase (ALT)[SMD=0.079,95%CI(-0.086,0.244),P=0.348],total bilirubin (TBIL) [SMD=0.056, 95%CI(-0.118,0.230),P=0.529],ALB[SMD=-0.020,95%CI(-0.494,0.454),P=0.935],HBV-DNA negative conversion rate [RR=1.012,95%CI(0.950,1.079),P=0.710],HBV e antigen(HBeAg)seroconversion rate [RR=1.181,95%CI(0.969,1.439), P=0.099],HBeAg negative conversion rate [RR=1.011,95%CI(0.860,1.189),P=0.893],follow-up 96 week liver function Child-Turcotte-Pugh score [SMD=-0.063,95%CI(-0.299,0.173),P=0.601],virological breakthrough rate [RR=1.562,95%CI (0.471,5.178),P=0.466],mortality rate [RR=1.198,95%CI(0.624,2.300),P=0.587] and the incidence of adverse reactions [RR=1.552,95%CI(0.618,3.900),P=0.349]in 2 groups;follow-up 48 week liver function CTP score in combination group was significantly higher than control group,the difference was statistically significant [SMD=0.352,95%CI(0.031,0.672),P=0.031]. CONCLUSIONS:LAM combined with ADV shows similar efficacy and safety to ETV in the treatment of decompensated HBV-as-sociated cirrhosis,but within short term(48 weeks),ETV is more likely to inhibit the development of liver fibrosis of the chronic HBV patients,and even can reverse liver fibrosis and cirrhosis.

Objective To study the function of the X\|zone cells in the 5 days old male mouse adrenal gland and the relationship between the function and the sexual differentiation. Methods The technique of in situ RP\|PCR was used to detect the expression of type Ⅰ and Ⅲ 17? HSD mRNA. Results In the cells of X\|zone which located in the interface between adrenal crotex and medulla, there were expressions of type Ⅰ and Ⅲ 17? HSD.Conclusion\ The X\|zone cells of adrenal gland in immature mouse could synthesize androgen, enhanced the male sexual differentiation together with the androgen synthesized from the testis.\;[

Animals ; Biological Availability ; Drug Carriers ; chemistry ; Drug Delivery Systems ; Humans ; Lactic Acid ; chemistry ; pharmacokinetics ; Nanoparticles ; Polyesters ; Polyethylene Glycols ; chemistry ; pharmacokinetics ; Polyglactin 910 ; chemistry ; pharmacokinetics ; Polyglycolic Acid ; chemistry ; pharmacokinetics ; Polymers ; chemistry ; pharmacokinetics

Objective To investigate the influence of CO2 pneumoperitoneum on the adhesive and invasive ability of gastric cancer cells based on the expression of adhesive and invasive molecules. Methods With an artificial CO2 pneumoperitoneum model in vitro, human gastric cancer cells MKN-45, SGC-7901 and MKN-28 were exposed to 3 different CO2 gradients: 9 mm Hg, 15 mm Hg and control group (0 mm Hg). The expression of E-cadherin, ICAM-1, MMP-2 and VEGF-A were measured at 2 and 4 hours exposure by using RT-PCR, CytoMatrixTM kit and ECMatrixTM kit. The pretreated gastric cancer cells were injected into abdominal cavity of nude mice(2×106 cells per mouse). Five mice in each group were sacrificed 4 weeks later to record the number of tumor nodules in abdominal cavity. The remaining mice were kept for observation of survival time. Results The expression of E-cadherin (MKN-45: from 2.26 to 2.19, SGC-7901 :from 2.16 to 2.09、MKN-28 :from 2.06 to 1.99), ICAM-1 (MKN-45 : from 2.20 to 2.28、SGC-7901: from 2.10 to 2.18、MKN-28: from 2.00 to 2.08), MMP-2 (MKN-45:from 2.05 to 2.13、SGC-7901: from 1.95 to 2.03、MKN-28: from 1.85 to 1.93) and VEGF-A(MKN-45 : from 2.10 to 2.16、SGC-7901 :from 2.00 to 2.06、MKN-28: from 1.90 to 1.96) didn't change significantly with increasing pressure and time (P>0.05). The expression of adhesive and invasive molecules didn't change significantly between the experimental groups and the control group. There was no statistical significance of tumor metastasis in abdominal cavity of nude mice(MKN-45:from 22 to 23、SGC-7901 :from 20 to 22、MKN-28:from 21 to 22) and survival time(MKN-45 :from 23 to 21、SGC-7901 :from 22 to 21、MKN-28 :from 22 to 21) among all the groups. Conclusion Under low pressure and short time of CO2 exposure, the adhesive and invasive capacity of gastric cancer cells did not change significantly hence did not increase the possibility of neoplasm metastasis.

Objective To explore the clinical characteristics and prognosis factors of child hemophagocytic syndrome(HPS)in different age groups.Methods Eighty-five children cases of HPS were divided into 3 age groups,0-2 years old (group A),＞2-8 years old (group B) and ＞8-14 years old (group C).The etiology,pathology,clinical symptoms,laboratory detection and prognosis were retrospectively analyzed.Results In the etiology,the etiology in the group A,B and C was dominated by EB virus infection,the infection positive rate in the group C was significantly higher than that in the group B and C;in the bone marrow examination:the occurrence rate of granulocytes to erythrocytes ratio ＜1.0 in the group A was higher than that in the group C;in the clinical symptoms,cervical lymph node enlargement mostly occurred in the group B,hepatosplenomegaly was most rare in the group C,and the serous cavity effusion commonly occurred in the group B;in the laboratory detection,the LDH level in the group B was higher than that in the group A,the above differences were statistically significant(P＜0.05).There were no statistically significant differences in other clinical symptoms and laboratory detection results among the three groups (P＞0.05);In the comparison between the survival group and death group,the serous cavity effusion,triglyceride(TG),CD4/CD8 ratio and granulocytes to erythrocytes ratio in bone marrow had statistical difference(P＜0.05).The above factors were performed the Logistic analysis,the results showed that TG＞3.5 mmol/L,CD4/CD8 ratio ＜1.24 and bone marrow granulocytes to erythrocytes ratio ＜1.02 were the unfavorable risk factors affecting the prognosis of child HPS (P＜0.05).Conclusion Partial clinical characteristics of child HPS are related with the onset age,TG level,CD4/CD8 ratio and bone marrow granulocytes to erythrocytes ratio are the risk factors affecting prognosis.