Objective To analyse the color ranges of 3 kinds of imported composite resin and to compare the color range of imported composite resin with that of Chinese teeth in the southwest of China. Methods The color of 3 kinds of imported composite resin was mearsured with the spectrophotonery system of human tooth color which had a fiber optic heading.The color range of imported composite resin was compared with that of Chinese teeth. Results The color distribution spaces of 3 kinds of imported compositeresin had different color ranges that were smaller than that of Chinese teeth. Being compared with Chinese teeth color, imported composite resin was short of higher and lower light color, and imported composite resin was short of greener and redder color either. Conclusions The color distribution spaces of imported composite resin are different from that of Chinese teeth in the southwest of China, and any kind of composite resin can not meet the color demand from dental clinic.

Objective:To compare the shear bonding strength between two kinds of veneering ceramics respectively bonded to Vita Mark II.Methods:Vita Mark II samples were prepaired in the size of 8 mm ×6 mm ×2 mm.Veneering ceramic VM9 and Titankeram-ik were sintered on the Vita Mark II blocks respectively(n =1 0).The shear bond strength of each specimen was measured,the failure mode of the fracture surface was observed by SEM.The element in the bonding interface was analysed by field emission scanning elec-tron microscope(FE-SEM).Results:The values of shear bond strength (MPa)of VM9 and Titankeramik groups were 36.1 7 ±8.91 and 42.07 ±8.31 respectively(P >0.05).SEM observation showed tight bond between the two materials,FE-SEM results showed penetration of Al element from MarkⅡblock into veneering porcelain VM9 or Titankeramik.Conclusion:Veneered porcelain of VM9 and Titankeramik can be used as the individual veneering ceramics for Vita Mark II blocs.

The article discusses how to innovate in the departmental rotation examination for the students practicing in hospital in the new time.It is important for the teacher to provide guidance to students and motivate them to take part in comprehensive training of competence actively so as to cultivate the high-level medical students adaptive to the modern society.

Humanistic spirit advocates the concern for human,and the medical value of people foremost.Now status quo of oral medical students' humanities concern is worrying.This paper aims to analyze the reason,and the best way to culture oral medical students' humanities concern is not only to have an aim of training medical professionals who have oral medical knowledge and skills,but also to look upon the education of medical humanistic spirit as important educative content,to improve teachers' humanities diathesis,to enhance the contact between medical students' and society or patients,to foster affection,to train skills,and to establish the good environment of humanities education.

Objective To investigate the preventive effects of epigallocatechin gallate (EGCG) on growth and metastases of orthotropic colonic cancer. Methods Forty BALB/C male nude mice were prepared for model of colonic cancer and then divided into control group and low-, medium- and high-dose of EGCG groups with 10 each. Except control group, the mice in other three groups were treated with 5, 10 and 20 mg·kg~(-1)·d~(-1) of EGCG. The effect of EGCG on growth and metastases of colonic cancer was observed. The histopathologic changes of liver and lung were observed with HE, and protein expression of NF-E2-related factor 2 (Nrf2) in cancerous tissue was detected by immunohistochemistry. RT-PCR was used to examine mRNA levels of Nrf2, UDP-glucuronosyhrans-ferase (UGT)1A, UGT1A8 and UGT1A10. Results In comparison with control group [(564±130) mg], the average weight of the tumor in low-, medium- and high-dose groups was (152±63) mg, (76±42) mg and (18±10)mg, respectively, with tumor inhibitory rate of 73.0%, 86.5% and 96.8%, respectively (all P value<0.05). There was a positive correlation between tumor inhibitory effect and dosage of EGCG (P<0.05). The protein expression of Nrf2 and the mRNA levels of Nrf2, UGT1A, UGTIA8 and UGTIA10 in three EGCG treated groups were increased significantly compared with control group (P<0.05), and there was a phenomenon of nuclear transcription of Nrf2. Conclusions EGCG can prevent local growth and metastases of orthotopic colonic cancer in a dose-dependent manner in nude mice. The inhibitory effect may be caused by inducing the expressions of Nrf2, UGT1A, UGT1A8 and UGT1A10 genes.

Objective To explore the clinical and laboratory characteristics of patients with dengue fever(DF)in Guangzhou from July to September in 2006 and to improve the awareness of dengue virus infection for physicians.Methods Clinical data of 277 patients with DF admitted to our hospital in Guangzhou were retrospectively analyzed.Dengue virus was isolated from patients' blood specimens by C6/36 cell culture and typed by reverse transcriptase-polymerase chain reaction(RT-PCR)assay and gene sequencing.Results Age of the 277 patients,148 males and 129 females,averaged 36 years with a standard deviation of 17 years,ranging from 9 months to 78 years.Their most common symptoms included fever(100.0%),skin rash(85.2%),headache(69.3%),myalgia(51.3%),bone soreness (39.0%)and nausea or vomiting(39.4%),and leucopenia and/hromboeytopenia occurred in 75.5% and 62.5% of them,respectively.Elevated alanine aminotransferase(ALT)was found in 59.6%,elevated aspartate aminotransferase(AST)in 81.6%,and hypopotassemia in 53.8% of them.Serum positivity of antibody against dengue virus IgM was 90.6%,which could be detected 3 to 10 days after onset of the illness,with a mean of 6.2 days with a standard deviation of 1.9 days.Cell-cultured virus from 20 patients were identified as typed by RT-PCR and RNA sequence analyses.All patients were clinically classified as typical DF and all of them completely recovered.Conclusions DF during this epidemic in Guangzhou was caused by dengue virus-1,with typical manifestations in all the patients but more damage in the liver.Some patients demonstrated hypopotassemia,but no dengue hemorrhagic fever or dengue shock syndrome was found.All the patients experienced a good prognosis with timely diagnosis and treatment.

Objective:To study the effects of expansion of ropivacaine hydrochloride liquid on the postoperative analgesia,sedation, hemodynamic effects and adverse drug reactions of the patients underwent endoscopic thyroidectomy,and to explore its clinical effectiveness and safety. Methods:Forty patients who were to undergo endoscopic thyroidectomy via chest-breast approach were randomly assigned to saline solution group and expansion liquid of ropivacine hydrochloride group (ropivacaine group,n = 20).The mean arterial pressure (MAP )and heart rate (HR)were also evaluated at the following time points:preoperative evaluation (T0 ),before local anesthetic infiltration (T1 ),at the end of the operation (T2 );the blood loss,the operation time,the postoperative drainage,and the hospital duration of the patients in two groups were recorded; the nausea and vomiting,the respiratory depression,the toxicity response,the infection,and the recurrent laryngeal nerve injury during 24 h after operation were recorded.The postoperative pain scores were assessed at extubaltion (T3 ),30 min (T4 ),2 h (T5 ),6 h (T6 ),12 h (T7 )and 24 h (T8 )after extubation using Visual Analog Scale (VAS).The postoperative Ramsay scores were assessed at T3 and T4 .Results:There were no significant differences in MAP and HR at T0 and T1 of the patients between two groups (P >0.05).Compared with saline solution group,the MAP and HR at T2 and T3 of the patients in ropivacaine group were significantly decreased (P < 0.05).There were significant differences in the blood loss,the operation time, the postoperative drainage,and the hospital duration of the patients between two groups (P <0.05).The number of patients required postoperative analgesia and the number patients with nausea and vomiting in ropivacaine group were decreased compared with saline solution group (P <0.05).Compared with saline group,the VAS scores at T3 ,T4 ,T5 ,T6 ,T7 and T8 of the patients in ropivacaine group were significantly decreased (P <0.05);the Ramsay scores at T3 and T4 of the patients in ropivacaine group were also decreased significantly (P <0.05).Conclusion:Expansion liquid of ropivacaine hydrochloride can reduce the stress response during endoscopic thyroidectomy effectively and reduce the postoperative pain and injury induced by operation.

Objective To evaluate and compare the efficacy of holmium laser enucleation of the prostate(HoLEP) and plasmakineticenucleation of the prostate(PKEP) for treating benign prostatic hyperplasia (BPH).Methods A total of 86 cases of BPH were selected from the Shandong Energy Zibo Mining Group Co.Ltd Central Hospital from January 2013 to June 2014.The patients received either HoLEP (40 cases) or PKEP(46 cases) treatment.Clinical data including postvoid residual volume (PVR),international prostate symptom score(IPSS),quality-of-life score(QOL score),maximum urinary flow rate (MFR) were evaluated before and 3 months after operation.Blood loss in operation,operation time,weight of resected prostate tissue,bladder irrigation time,catheterization time and length of hospital stay were also collected from the perioperative period.Results Three months after surgery,PVR,IPSS,QOL and MFR were all significantly improved in both HoLEP and PKEP groups compared with the data before operation (P =0.000),while there was no significant difference between the two groups(P＞0.05).Patients from the HoLEP group showed markedly lower values of bone loss in operation than that of PKEP group((69.5±23.6) ml vs.(87.5±38.0) ml,P=0.011).There were no significant differences in terms of other indexes (P＞ 0.05).Conclusion HoLEP and PKEP have similar efficiency in treating BPH,while HoLEP is suggested superior in regard of bone loss.

Objective To master the results of examination and evaluation of coal-burning-borne endemic fluorosis in Shanxi Province,and to provide a scientific basis for further prevention and treatment of the disease.Methods In 2012-2015,the prevention and control situation and condition survey were carried out in all coalburning-borne endemic fluorosis villages of 20 counties in Shanxi Province.A county-level self-inspection and a provincial-level spot-check were conducted to investigate the changes of improved stove and correct usage of the improved stove,and the correct drying of corn and pepper for human consumption.Children aged 8 to 12 were examined for dental fluorosis.The endemic areas were selected according to the Control Standards of Endemic Fluorosis in Endemic Areas (GB 17017-2010) and Eliminating Standards of Coal-burning Type Endemic Fluorosis,and dental fluorosis children was diagnosed based on the Diagnosis of Dental Fluorosis method (WS/T 208-2011).Results Totally 3 371 villages and 716 683 households were investigated,the rates of the improved stove and the correct usage of the improved stove were 98.72％ (707 502/716 683) and 98.74％ (698 608/707 502);the correct drying rate of corn and pepper for human consumption was 99.85％ (715 605/716 683);the dental fluorosis rate of 8 to 12 years old children and the dental fluorosis index were 6.41％ (6 762/105 453) and 0.14.A total of 20 counties in the province,9 counties had reached the control standards,11 counties had reached the elimination standards.Provincial and municipal level checked a total of 57 towns,157 villages,and the results of the overall compliance rate was 87.26％ (137/157).Conclusions The prevention and control effect is obvious on coalburning-borne endemic fluorosis in Shanxi Province.Disease surveillance,health education,the management and maintenance work on defluoridation stoves are keys in control of coal-burning-borne endemic fluorosis.

Objective:To analyze and summarize the causes of unscheduled suspension of knee and hip arthroplasty and to provide the method for optimizing the patient's pre-operative management and improving the efficiency of medical resources as well as the patient's satisfaction.Methods: The data for this report was retrospectively collected from September 2013 to August 2014 in our hospital,from cases of knee and hip arthroplasty that were suspended before the scheduled operation time.Acquisition data from the collected cases including the patients' gender,age and the surgical procedure.At the same time,the suspension reasons were recorded and analyzed.All the decisions of suspension was made by the surgeons and the anesthesiologists according to the abnormal result of preoperative examinations,after communicating with the patients and their families and obtaining their understandings.Results: In the collecting period,our department scheduled 1 146 cases of knee and hip arthroplasty,among which 1 003 were completed,143 suspended (12.5％ suspension rate).Among the causes of suspension,the top four common causes were cardiovascular disease (44/143,31％),other infections (20/143,14％),bacteriuria (18/143,13％) and inappropriate surgical indication (16/143,11％).Other causes include surgeon's reason,Blood system abnormalities,high inflammatory index,deep vein thrombosis,other diseases uncontrolled,abnormal liver function and poor diabetes mellitus control,etc.For the rate of suspension,there was no significant difference between the patients with different genders (male: 15.0％,and female: 11.7％,P=0.149),or age (≤50 years: 13.0％;51-65 years: 11.6％;66-80 years 13.3％;>80 years 11.1％;P=0.864).However compared with knee arthroplasty,hip arthroplasty had a higher suspension rate (knee arthroplasry 11.1％,hip arthroplasry 16.1％,P=0.021).Conclusion: It is important to educate and manage the patients before their knee and hip arthroplasty.Through clear diagnosis,detailed medical history analysis careful physical examination,and targeted outpatient examinations and tests for which priority was focused on cardiovascular or other system diseases we could minimize the occurrence of operative suspension post hospitalization,therefore improving the efficiency of the use of medical resources.