Objective: To study the effects of light intensity on the compressive strength and tensile strength of light -curing composite resin. Methods: 25 samples of Shade A (Dentsply,USA) light-curing composite resion in the size of 10?5?1(mm) and equally divided into 5 groups.The light intensities (mW/cm 2?40 s) of 300,500,800,300 mW/cm 2?10 s+500 mW/cm 2?30 s,300 mW/cm 2?10 s+800 mW/cm?30 s were applied during the light-curing in group 1,2,3,4 and 5 respectively.The compressive strength and tensile strength of of the samples were measured by computer-controlled electronic testing machine (type WDW-100). Results:The compressive strengths (MPa) of group 1,2,3,4 and 5 were 228.68?20.25,274.67?6.99,380.53?9.81,345.47?10.71 and 414.06?29.34 respectively (P

Objective To explore the clinical application value of the expression levels of serum hypoxia induced factor-1α(HIF-1α),vascular endothelial growth factor(VEGF),carcino-embryonic antigen(CEA)and CA125 in predicting the recurrence or metastasis of colon cancer after radical resection.Methods Totally 123 cases of colon cancer after radical surgery in our hospital from July 2009 to December 2013 were performed the retrospective analysis.The correlation between the serum markers levels with the recurrence or metastasis was dynamically analyzed.Results (1)The HIF-1αand CEA levels after operation in 123 cases of co-lon cancer were decreased significantly compared with before operation;(2)The HIF-1α,CEA and CA125 levels in 39 cases of re-currence or metastasis were significantly increased compared with those in 84 cases of non-recurrence or non-metastasis (P <0.05);(3)in 39 cases of recurrence or metastasis,the HIF-1α and CEA levels in recurrence or metastasis were increased signifi-cantly compared with those after the end of chemotherapy (P <0.05);(4)HIF-1αwas positively correlated to VEGF(P <0.05). Conclusion The serum levels of HIF-1αand CEA in the patients with colon cancer are positively correlated with recurrence or me-tastasis,the dynamically combined detection of serum markers has an important significance for predicting and early find recurrence or metastasis after radical operation in colon cancer.

Objective To evaluate the efficacy of entecavir treatment on hepatitis B patients with acute-on-chronic liver failure. Methods Eighty-four hepatitis B patients with acute-on-chronic liver failure were treated with entecavir 0.5 mg daily and Other routine drugs. Another 99 hepatitis B patients with acute-on-chronic liver failure were treated with only routine drugs as control. The survival, liver functions, hepatitis B virus (HBV) DNA level, prothrombin time (PT) were observed. The survival rates of patients with early, middle or late stage of liver failure were analyzed. The comparison of rates were done using chi-square test. The numeration data were compared by t test. The survival rates were compared using Kaplan-Meier method. Results Among patients with early stage of acute-on-chronic liver failure, the survival rate in treatment group was 63.3% (31/49), which was significantly higher than that in control group (39.7%, 23/58) (χ2=5.923, P=0.015). Among patients with middle stage of acute-on-chronic liver failure, the surviral rate in treatment group was 63.0% (17/27), which was significantly higher than that in control group (35.1%, 13/37) (χ2=4.854, P=0.028). Among patients with late stage of acute-on-chronic liver failure, four out of eight cases survived in treatment group, while one out of four cases survived in control group. In patients with serum total hilirubin (TBil) level > 342 μmol/L, the survival rate was 56.0% in treatment group, which was significantly higher than that in control group (26.8%) (χ2=9.351,P=0.002). At week 4 of the treatment, the HBV DNA reduction in treatment group was 3. 95 lg copy/mL, which was higher than that in control group (1.78 lg copy/mL) (t=5.847, P=0.001). Conclusions Entecavir treatment could improve the survival rate of hepatitis B patients with early or middle stage of acute-on-chronic liver failure. And the further study with larger population is needed in patients with late stage of liver failure. In addition, entecavir therapy could also improve the survival rate of patients with TBil >342 μmol/L.

Objective To discover the risk factors of acute renal insufficiency(ARI) in perioperative of non-small cell lung cancer(NSCLC).Methods We took a retrospective study to analysis and summarize the clinical features of 33 ARI cases and 721 controls,all subjects were histopathologically confirmed NSCLC from January 2007 to October 2013.Logistic regression analysis was conducted to analyze the association between the risk factors and ARI.Results There were significant differences between the two groups in operation age,level of preoperative creatinine,preoperative rehydration and the use of plasma substitutes.After adjustment by confounding factors,operation age older than 60 years old and the use of plasma substitutes had higher risk of ARI [adjusted OR was 2.93 (1.30-6.62),95 ％ CI was 6.04 (1.41-25.87),respectively].Preoperative rehydration was protective factor of ARI(adjusted OR was 0.37,95％ CI was 0.17-0.83).Conclusion Operation age (≥ 60 years old) and the use of blood substitutes are independent risk factors of ARI,while preoperative rehydration can reduce the incidence of ARI after surgery.

AIM: To define the relationship between platelet distribution width ( PDW) , fibrinogen ( FIB) and severity of diabetic retinopathy ( DR) .
METHODS: The survey included 99 patients with DR (48 with non-proliferative and 51 with proliferative DR) in our hospital during June 2012 and May 2014. Another 50 diabetic patients without DR and 50 healthy volunteers were matched as controls. Demographic data and disease history were gained. Fasting blood sample were collected to measure PDW, FIB, platelet count, fasting blood glucose and HbA1c.
RESULTS: Compared with healthy controls ( 16. 6%±1.2%) , a significant difference was found in PDW values among diabetic patients ( all P < 0. 05 ). The higher development of DR corresponded with a significantly higher level of PDW 17. 6%±1. 8%, 19. 1%±2. 1%, and 20%±1. 9% for patients without DR, non-proliferative DR and proliferative DR, respectively, the difference had statistical significance (P<0. 05). A significant difference was also found in FIB values among diabetic patients and healthy controls (P<0. 05). After correction for age,
gender, disease duration and HbA1c, multi factor Logistic analysis showed that there were significant increased risks in the prevalence of non-proliferative ( OR: 1. 464, PDW) ( OR: 2. 199, FIB) and proliferative DR ( OR: 1. 652, PDW ) ( OR: 2. 691, FIB ) with the increased PDW and FIB value (all P<0. 05).
CONCLUSION: The PDW and FIB value are parallel with the severity of DR, and there is increased risk of non-proliferative and proliferative DR with the PDW and FIB value increases.

Objective The objective of the present study was to evaluate the early auditory development in hearing impaired infants by LittlEARS? auditory questionnaire .Methods A total of 162 hearing impaired infants participated in the study .LEAQ consists of 35 items ,which were further divided into receptive auditory behavior , semantic auditory behavior ,and productive auditory behavior .The assessment was performed before hearing aid fit‐ting ,3 ,6 and 12 months after hearing aid fitting ,respectively .Results LEAQ scores improved dramatically in the first 12 months after hearing aid fitting ,total LEAQ scores prior to hearing aid fitting ,3 ,6 and 12 months after hearing aid fitting were 10 .47 ,17 .73 ,20 .64 and 26 .47 ,respectively .The receptive auditory behavior performance improved significantly after 3 months of hearing aid use .The duration of hearing aid use for dramatic improvement of semantic auditory behaviors ,and productive auditory behavior was 6 and 12 months ,respectively .The age of hearing aid fitting ,living environments ,degrees of parent education and degrees of hearing loss influenced LEAQscores significantly .Conclusion Hearing impaired infants exhibited significant auditory improvement in the first 12 months after hearing aids fitting .Early hearing aid fitting ,high level of parent education and well living environ‐ments promote preverbal auditory development .LEAQ is an effective tool for clinical auditory assessment and moni‐toring in infants and little toddlers .

Objective To investigate the effect of miR-200 a mimic on transforming growth factor β1-mediated acti-vation and collagen secretion of rat pancreatic stellate cells .Methods PSCs were isolated and cultured from pan-creatic tissue and identified by desmin , GFAP and α-SMA immunofluorescence staining .PSCs of 2nd generation were divided into control group , TGF-β1 group, TGF-β1+miR-NC group and TGF-β1+miR-200a mimic group.α-SMA and collagen Ⅰ protein were measured by Western blot and immunofluorescence staining .The mRNA ofα-SMA and collagen Ⅰ and the expression of miR-200a were detected by quantitative real-time PCR.Results TGF-β1 stimulates the activation of PSCs and promote collagen synthesis in time-dependment manner ( P<0.05 ) . After transfection of the mimic , treating with the same concentration of TGF-β1, the expressions of protein and mR-NA of both α-SMA and collagen Ⅰ decreases significantly ( P<0.01 ) .Conclusions Over-expression of miR-200 a significantly attenuates α-SMA activity and further affects the collagen synthesis of TGF-β1-dependent activa-tion of PSCs.The mechanisms are potentially related to the biological effects of TGF-β1.

OBJECTIVE To investigate the diagnostic and prognostic value of molecular biological detection of DTC in peripheral blood. METHODS 32 cases of laryngeal or laryngopharyngeal carcinoma were investigated. DTC in peripheral blood was detected by nested reverse transcription polymerase chain reaction,using CK19mRNA as the marker. RESULTS In the RT-PCR study,15 of 32 cases (46.9 %) showed a positive result. Ten of the 25 cases (40 %) of laryngeal carcinoma were positive. Fix of the remaining 7 cases (71.4 %) of laryngopharyngeal carcinoma were positive. All controls were negative. Of the 20 cases without lymph node metastasis,6 were positive; of the 12 cases with lymph node metastasis,9 were positive. The positive rate of the group with lymph node metastasis was higher than that of the group without lymph node involvement(P

BACKGROUND:Compared with the cone stem,short stem holds good matching with femoral canal,and remarkably reduces the risk of prosthesis loosening.OBJECTIVE:To further investigate the clinical efficacy of Accolade Ⅱ stem for Crowe type Ⅰ developmental dysplasia of the hip.METHODS:Clinical data of 16 patients with Crowe type Ⅰ developmental dysplasia of the hip undergoing total hip arthroplasty using Accolade Ⅱ stem were collected,the length of both lower limbs before and after surgery was compared,and the Visual Analogue Scale,functional recovery of the hip and general conditions were observed at 12 weeks postoperatively.RESULTS AND CONCLUSION:(1) The change in length of both lower limbs before and after surgery had significant difference (P ＜ 0.05),and 10 patients (62％) with the same length of both lower limbs before surgery,and 15 cases (94％) after surgery.(2) The postoperative acetablar abducent angle was 41°-54° (average 46.9°).(3) The Visual Analogue Scale and Harris hip scores after surgery were significantly improved compared with baseline (P ＜ 0.05).(4) The intraoperative blood loss was 147 mL on average,the mean operation time was 72 minutes,and the hospitalization time was 7.2 days.(5) All patients recovered well and no complications occurred at 3 months postoperatively.(6) To conclude,Accolade Ⅱ stem is safe and reliable for Crowe type Ⅰ developmental dysplasia of the hip,and exhibits good functional recovery of the hip.

Objective To study the relationship between type 2 diabetes peripheral neuropathy and the activity of serum super-oxide dismutase(SOD) ,and the relationship between the activity of serum SOD and gender ,age ,and blood glucose concentrations in patients with type 2 diabetes peripheral neuropathy .Methods One hundred and twenty-five T2DM patients with diabetic peripheral neuropathy(DPN) and 125 healthy individuals were enrolled in the study .The pyrogallol autoxidation method were used to deter-mine the the activity of serum SOD ,and then the differences of serum SOD activity were compared between the 2 group of people . The relationship between the activity of serum SOD and gender ,age ,and blood glucose concentrations in patients with type 2 diabe-tes peripheral neuropathy were analyzed .Results The difference of the activity of serum SOD between type 2 diabetes peripheral neuropathy group and control group was statistically significant (t=7 .798 ,P=0 .000) .There were no differences between the ac-tivity of serum SOD and gender ,age ,and blood glucose concentrations in patients with type 2 diabetes peripheral neuropathy .The SOD activities in 6 .1-7 .0 mmol/L and ≥7 .0 mmol/L groups were statistically significant (P=0 .034) .Conclusion The activity of serum SOD increase in T2DM patients with DPN .The activity of serum SOD is associated with blood glucose concentrations ,and might increase with elevated blood glucose .