Objective:To evaluate the influence on root resorption after distalizing molars with face bow.Methods:15 cases whose molars were distalized with face bow were selected in present research. Root lengths were measured on pre-treatment and post-treatment dental films taken with the oral positioner. The distances of molar distalization were measured on cephalometric radiographs.The differences of the pre-treatment and post-treatment root lengths were evaluated by the Paired t-test.The correlation between the distance of molars distalization and the root resorption of the maxillary molars was analyzed with Pearson's correlation coefficients.Results:The root lengths between the pre-treatment and post-treatment showed a statistically significant difference(P

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 analyse the suspected hereditary non-polyposis colorectal cancer (HNPCC) in mismatch repair protein (MMR) expression of hMLH1 and hMSH2. Methods Immunohistochemical staining method was used for the detection of hMLH1 and hMSH2 protein expression in 193 cases suspected HNPCC patients, the deletion of MMR proteins was identified as highly suspected HNPCC cases. Results Of the 193 patients with suspected HNPCC hMLH1/hMSH2 abnormal expression rate was 29.02%; ≤30 years old was 40%, 31 ~ 40 years old was 28.05%, 41 ~ 50 years old was 28.71%,3 suspected HNPCC showed the deletion of hMLH1/hMSH2 protein expression at the same time ,; In the right colon , the left half colon and rectal anomaly detection rates were 40.74%, 32.65%and 18.89%; hMLH1/hMSH2 deletion was 46.15%with family history. Conclusions The deletion of MMR protein is closely related to age,site and family history in suspected HNPCC, and the deletion of hMLH1 is an important factor to induce early-set colorectal cancer. The deletion of hMLH1/hMSH2 at the same time indicates that hMLH1/hMSH2 genes may play important role in the incidence of HNPCC.

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.

Teachers should have a good understanding of characteristic of Pathology Practical Training and enhance language communication competence,especially the expression ability in medical English.Meanwhile,it is essential for teachers to establish harmonious relationship with international students.

Objective To explore effect of ginkgetin injection on brain damage factor in patients with acute cerebral infarction.Methods 180 cases of acute cerebral infarction patients were selected from June 2014 to February 2015, and divided into experiment group and control group.88 cases in control group were treated with clinical routine therapy, 92 cases in experimental group were treated on base of the control with ginkgetin injection, 2 weeks for a course.The clinical efficacy, MESS and serum HIF-1α, TNF-α, Caspase-3, were detected and compared.Results The clinical efficacy of the experiment group was better than that of control group(P<0.05),and the MESS of the experiment group was lower than the control group(P<0.05).Serum HIF-1α, Caspase-3, TNF-αlevels were lower than the control group(P<0.05).Conclusion Ginkgetin injection can effectively improve the patient’s neurological symptoms, it is of great significance to the clinical treatment of cerebral infarction.

Background and purpose:Colorectal serrated adenoma (SA) was ofifcially named in 2000 by the WHO as a separate disease, with unique properties compared with traditional adenoma (TA), and its relationship with colorectal cancer (CRC) is very concerned. This study was to analyze and compare the telomerase, p53 and Ki-67 immunohistochemical expression on the tissues of SA, TA and CRC. Methods:Immunohistochemistry was adopted to analyze the expression of telomerase, p53, and Ki-67 in 37 cases of SA, 36 cases of TA and 34 cases of CRC. Results:The p53-positive percentage of SA was signiifcantly lower than that of TA (P<0.01), and the p53-positive percentage of TA was signiifcantly lower than that of CRC (P<0.01). No signiifcant difference of Ki-67 expression was found between SA and TA, and the Ki-67-positive percentage of SA and TA was lower than that of CRC (P<0.01). The telomerase-positive percentage of TA was signiifcantly lower than that of SA (P<0.01), and the telomerase-positive percentage of SA was signiifcantly lower than that of CRC (P<0.05). Conclusion:Telomerase, P53, and Ki-67 immunohisto chemical analysis indicated that SA is a kind of proliferative adenoma, and telomerase activation may play a role in the cancer process.

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 reveal the influence of environmental factors on the active components in Scutellaria baicalensis through analyzing the data sampled from the herbal plants along the altitudinal gradient in mountainous region of Western Beijing.Methods In total 85 individuals of S.baicalensis herbs were collected and the surface soils under each of the plant were also sampled from eight different habitats,with an interval of about 100—150 m vertically ranging from 800 to 1 800 m in August through September,2007.The contents of active components in the herbal samples,namely baicalin,wogonoside,baicalein,wogonin,and oroxylin A were determined by HPLC.The organic matter and the total nitrogen contents in the soil samples were analyzed through standard measurement process.The various habitat conditions represented by temperature were estimated through a vertical lapse rate of-0.56 ℃/100 m,and those by precipitation and solar radiation calculated according to the isoline maps.Results The signi-ficant positive correlations were observed only between the contents of baicalin,wogonoside and the elevation.Both those two contents showed the significant negative correlations with the annual mean temperature and precipitation,while showed positive with annual mean solar radiation.No coorelation with any statistical significance was observed between the contents of active components in S.baicalensis and the soil parameters in this study.Conclusion It seems that the plants of S.baicalensis growing in a habitat with annual mean temperature within a range of 2—6 ℃ could concentrate relatively rich contents of active components.Within the natural distribution areas of S.baicalensis,the habitats with an annual tem-perature averaged at 3—4 ℃ tend to be the most fitting sites for growing best quality S.baicalensis rich in active components,and those sites are almost coincident with the environment for trueborn production area of traditional S.baicalensis herbs.