Orthodontic tooth movement (OTM) is a very complicate mechano-biological procedure which is accomplished by the remodeling of periodontal tissues via orthodontic force.As the connective tissue between alveolar bone and cementum,periodontal ligament plays a vital role in the response and conduction of orthodontic force.The susceptible response of periodontal ligament to orthodontic force during OTM is a critical factor on inducing and modulating periodontal tissue restitution.This article reviews the concrete role of periodontal ligament and its mechano-biological behavior during OTM,discusses its mechanical response and biological mechanism respectively on histological,cellular and moleucular levels.

Objective:To study the surface enhanced Raman scattering ( SERS) of safflower and identify safflower injections by SERS quickly and effectively. Methods:Through comparative analysis of the Raman spectroscopy of safflower injections and the corre-sponding control herbs, the rapid identification of safflower injections was realized. Results:The results showed that several character-istic peaks of safflower were enhanced obviously in SERS, which could be used to identify safflower injections. Conclusion:The meth-od is reliable, rapid, accurate and specific, which can be applied as a method to identify safflower and its injections.

Objective:To choose a best method of estimating the amount of blood loss after cesarean deliveryby comparing of three methods,to analyze the related factors of the amount of the blood loss more than 500ml after cesarean section.Methods:We collected the clinical data of the patients who were accepted cesarean delivery and treated in our hospital between January 2014 and December 2014.We estimate the amount of blood loss by different methods(including visually estimated,hematocrit (HCT) change and formula).Based on the formula method as the gold standard,we analyze the risk factors of the patients whose blood loss were more than 500 ml.Results:Among the 583 patients,using the method of visually estimated,there were 23 cases whose blood loss were more than 500 ml(3.95％),using the method of formula,there were 133 cases whose blood loss were more than 500 ml (22.81％),using the method of HCT change,there were 116 cases whose blood loss were more than 500 ml(19.90％).The incidence of patients whose blood loss were more than 500 ml between HCT change and formula method showed no significant difference(P ＞ 0.05),but the incidence by visually estimated method was less than the two other methods (P ＜ 0.05).We found the value of HCT change was a statistically significant positive correlation with the amount of blood loss more than 500ml.When the blood loss was more than 500 ml,the accuracy and sensitiveness of HCT method were significantly higher than those of visually estimated method(76.69％,87.93％ vs 12.78％,73.91％,respectively).Abnormal labor,uterine leiomyoma,placental factors,and macrosomia were risk factors of cases whose blood loss more than 500ml.Conclusions:HCT method is similar in accessing the blood loss after cesarean section with formula method,especially in the cases whose blood loss was more than 500 ml;HCT method is more convenient than formula method,and more accurate than visually estimated method.HCT method can be used as the standard for estimating blood loss initially,and formula method should be used as the method for estimating the blood loss accurately.Patients with macrosomia and abnormal labor are more likely to occur massive hemorrhage after cesarean section.

Objective To explore the curative effect of bisoprolol fumarate combined with wenxin granule for patients with heart failure complicated with premature ventricular.Methods 132 patients with heart failure and premature ventricular complexes were enrolled in our hospital from January 2013 to January 2016,and which patients divided into two groups,bisoprolol fumarate group (Group BF,n =66) accepted bisoprolol fumarate treatment (5 mg/time,1 times/day),and bisoprolol fumarate combined with wenxin granule group (Group BW n =66) adopted wenxin granule (9 g/time,3 times/day) based on the patients in Group BF.After 4 weeks treatment,the curative effect of all patients were evaluated with electrocardiogram monitor and cardiac ultrasound examination,and the plasma NT-proBNP concentration and hemorheology indexes were analyzed compared with pre-treatment.Results The recovery of ventricular function in Group BW was better significantly than that patients in Group BF from the cardiac ultrasound examination (P ＜ 0.05);The total relieved effective of clinical symptom,premature ventricular complexes and heart failure in Group BW were more remarkable than those in Group BF,and which difference from them was significance (P ＜ 0.05);The blood viscosity,plasma viscosity,plasma fibrinogen and plasma NT-proBNP concentration in patients with Group BW were significantly lower than those Group BF (P ＜ 0.05).Conclusions The clinical curative effect of bisoprolol fumarate combined with Wenxin Granule for heart failure complicated with premature ventricular was more remarkable compare with bisoprolol fumarate single treatment,and which possessed the relative safety.

Objective To investigate the clinical effect of adopting B-type ultrasound guided peripherally inserted central catheter (PICC) in the patients with lung cancer.Methods Two hundreds and ninety-five cases of lung cancer undergoing PICC in our hospital from January 2011 to May 2016 were selected as the research subjects and divided into the observation group (151 cases) and control group (144 cases) according to the PICC methods.PICC in the observation group adopted the B-type guided modified Seldinger technique,while the control group adopted the conventional method.The venous thrombus occurrence situation in the two groups was comparatively analyzed.Results (1) The platelet count (PLT),plasma D dimer (D-D) and thromboxane B2 (TXB2),endothelin (ET),6-keto-prostaglandin F1 alpha (6-keto-PGF1α) before PICC had no signigicant difference between the two groups (P>0.05).PLT,D-D,TXB2 and ET at 12,24 h after PICC in the observation group and control group were gradually increased,while plasma 6-keto-PGF1α was gradually decreased,the intra-group difference among different time points had statistical significant (P<0.05).PLT and plasma D-D,TXB2 and ET in the observation group were significantly lower than those in the control group,while keto-PGF1α was significantly higher than that in the control group,the difference between the two groups was statistically significant(P<0.05).(2)The incidence rate of venous thrombosis in the observation group was significantly lower than that in the control group,the difference was statistically significant between the two groups (P<0.05).Conclusion Adopting B-type ultrasound guided modified Seldinger technique for PICC in the patients with lung cancer has much lower incidence rate of venous thrombosis.

Adenomatous polyposis coli gene is an important anti-oncogene of the Wnt signaling pathway. The promoter hypermethylation of APC gene can effect the expression of APC mRNA and APC proteinum, which can make Wnt signaling pathway anomalous. Recently. the promoter hypermethylation of APC Gene in gynecological tumors is found in many studies, and it is related to the aggravation level of tumor.This paper reviews the influencing factors and progress of promoter methylation of APC gene in Gynecological cancer.

Objective To assess the efficacy and safety of autologous drainage blood reinfusion in total knee arthroplasty(TKA). Methods Computers were used to search the Cochrane Central Register of Controlled Trials, MEDLINE, EMBASE, and VIP. The randomized controlled trials (RCTs) of autologous drainage blood reinfusion and vacuum suction without reinfusion after TKA were collected. And the results were analyzed by using the software RevMan5.1. Results Eight RCTs met the criteria for meta-analysis. Use of autologous drainage blood reinfusion significantly reduced the average amount of units of homologous blood transfusion, the length of hospital stay, and the number of patients requiring homologous blood transfusion. The rates of DVT formation and incision infection did not differ significantly between the two groups. Conclusions Autologous drainage blood reinfusion is a safe, effective procedure with less blood transfusion and medical cost. It can lower volume of allogeneic blood transfusion , shorten length of hospital stay, and avoid occurrence of complications.

Objective To evaluate application effectiveness of quality control circle (QCC)in increasing the face mask wearing rate of hospitalized pulmonary tuberculosis (TB)patients.Methods Nine nurses in department of tu-berculosis formed a ‘circle’,the theme of ‘improving the face mask wearing rate of hospitalized pulmonary TB pa-tients’was established,rectification measures were formulated and implemented,face mask wearing rates of pa-tients before and after implementing QCC activities were analyzed statistically.Results The face mask wearing rate of hospitalized pulmonary TB patients after implementing QCC activities was higher than that before implementing QCC activities (87.50% [147/168]vs 65.54%[116/177],P <0.05).The abilities of every ‘circle member’have been improved in the following aspects:problem-solving skills,sense of responsibility,communication skills,self-confidence,team working,enthusiasm,quality-control techniques,and cooperation abilities,the total average score increased from 23.78 before implementing QCC to 33.78 after implementing QCC.Conclusion QCC activities can not only improve the face mask wearing rate of hospitalized pulmonary TB patients,but also enhance circle mem-bers’quality-control skills and team spirit.

ObjectiveTo develop the military acute stress scale and examine the reliability and validity of this scale.MethodsBased upon the previous acute stress researches and the rule of psychometrics,the military acute stress scale was compiled according to open-ended inventory survey.A total of 630 personnel were chosen by random cluster sampling,and tested with this scale,50 of them were tested by Chinese Military psychosomatic health Scale simultaneously,and 50 of them were retested after two week.The reliability and validity were examined by exploratory factor analysis,confirmatory factor analysis and correlation analysis.ResultsThe military acute stress scale was comprised of 9 factors and one lie sub-scale ; Main fit indexes of model were the following CMIN =1219.476,DF =593,P =0.000,CMIN/DF =2.056,IFI =0.927,TLI =0.902,CFI =0.924,RMSEA =0.059; The conrelation coefficients between subscales and subscales were 0.284-0.572.The correlation coefficients between subscales and total scale were 0.700 ～ 0.846 (P ＜ 0.05 or 0.01 ) ; The correlation coefficients was significant between this scale and Chinese military psychosomatic health scale.The correlation coefficients were 0.338-0.962 (P ＜ 0.01 ).The test-retest correlation coefficients of total scale and subscales were 0.379-0.909 (P ＜ 0.01 ).The Cronbaeh's α coefficients were 0.606-0.926 ; and the split-half correlation coefficients were 0.466-0.855.ConclusionThe military acute stress scale has acceptable psychometrics properties on reliability and validity.

Reading therapy in hospital libraries, academic libraries and public libraries was described in terms of its theoretical study and practical study,and its significance in hospital library was elaborated by comparative analysis.