OBJECTIVEThis study aims to analyze the long-term stability of the anterior teeth and hard tissue of skeletal class III malocclusion after a three-year orthodontic surgery by systematic review.

METHODSAll studies about skeletal class III malocclusion with orthodontic-surgery were searched by computer-based retrieval and manual retrieval; the deadline is December 2013. The literature, filtered according to the inclusion criteria and exclusion criteria, was performed with quality. assessment. The same indicators of the anterior location and hard tissue stability were combined and evaluated with metaanalysis and descriptive analysis by Rev Man5.2.

RESULTSFour before-and-after comparison study articles with 180 cases were included. The grades of the four literature evaluation were A. The meta-analysis results showed that comparing the three-year post-orthodontic-surgery and post-orthodontic-surgery, the total weighted mean difference (WMD) of Ul-SN was 4.29 (P<0.05); the WMD of Ll-MP, OB, OJ, SNA, SNB, ANB, and MP-SN were -1.58, 0, -0.41, -0.58, 0.25, -0.70, and 0.39, respectively (P>0.05). The measurement methods of A and B point position were different, hence the qualitative description were as follows: point A remained at a relatively stable position, and point B had some replacement compared with post-operative (P<0.05).

CONCLUSIONTo the skeletal class III malocclusion after three-year orthodontic-surgery, the position of the lower anterior teeth could be kept stable, as well as the overbite and the overjet of the anterior teeth; only the upper inci- sor has a lip-inclined relapse. The maxillary could also be kept stable, and the mandibular had a little relapse.

Objective:To analyze the long term stability of the hard and soft tissues of the skeletal class III malocclusion after ortho-dontic-surgery by Meta-analysis.Methods:The randomized controlled trials(RCT),quasi-randomized controlled trials and clinical case-control trials(CCT)about the long-term stability of skeletal class III malocclusion after orthodontic-surgery was collected from Co-chrane Library,PubMed,Medline,CNKI,VIP and Wanfang databases from inception to December 31,2013 by literature search.Two professionally trained reviewers evaluated the quality of the screened literatures,scored literatures with the NOS evaluation tool,and collectd data and information of the literatures with medium and higher quality.Revman5.2 was used for the Meta-analysis.Results:4 CCTs articles and 178 cases were included.The results of Meta-analysis showed that:1.The stability of the hard tissue:the differ-ence of SNA(WMD =-0.58,95%CI[-1.18,0.02]),SNB (WMD =0.25,95%CI[-0.42,0.91]),ANB(WMD =-0.70, 95%CI[-1.44,0.04])and MP-SN(WMD =0.39,95%CI[-0.25,1.04])at post-operation and 3 years after operation had no statistical significance.Point A remained relatively stable position and point B had some replace 3 years after surgery compared with that at post-operative.2.The stability analysis of soft tissue:the healing effect of the soft tissue was stable,except the LowerlipeNperp had some recurrence 3 years after surgery.Conclusion:In the long term,after orthodontic and surgical treatment for skeletal class III malocclusion the hard and soft tissues kept stabile except a little replapse of the mandibular and the LowerlipeNperp.

[Abstract ] Objective The orthodontic-surgery is the most effective way to treat the severe skeletal class Ⅲmalocclusion,but the long-term stability is still disputed .The aim of this systematic review is to analyze the long-term stability of hard tissue of seriously skeletal Class Ⅲ malocclusion patients treated with orthodontic combined surgical treatment . Methods Literature were searched through the Cochrane Central Register of Controlled Trials , Cochrane Library, Medline via pubmed (1950-2014), EMBASE (1980-2014) and other foreign databases , and Chinese Biomedical Literature Database , China National Knowledge Infrastructure Database , VIP Database for Chinese Technical Periodicals , digital journal of Wan fang Data and so on .Unpublished conference papers and gray litera-tures were collected manually .The literatures consist of randomized controlled trials ( RCT) , quasi-randomized controlled trials and clini-cal case-control trial (CCT) were selected.Then meta analysis was performed for annexable literatures and qualitative description was performed for diverged documents . Results Five foreign articles and 1 Chinese article suitable for analysis were ultimately studied . All the studies were CCT and a total of 260 patients were involved in the present systematic review .Meta analysis showed that the SNA , SNB, ANB, MP SN and Y-axis did not change significantly during 3 years after operation (P>0.05) and a good skeletal class I facial types were maintained .The comparison results of MP-SN and Y-axis showed that there was no significant statistical difference and the mandibular plane angle maintained the relative stability .Meta analysis was not performed because of the different measurement methods of A, B, Pg and Ramus inclination , so the qualitative description was used .Point A and Ramus inclination remained relatively stable posi-tion, but point B and Pg had some replace compared with post-operative. Conclusion The orthodontic and surgical treatment for skeletal classⅢmalocclusion could keep the hard tissue relative stabil-ity except a little replace of the mandibular .

Objective To understand current status and influencing factors of long-term care for elderly people who lived in rural areas of Beijing.Methods A total of 1022 elderly people (age＞60 years old) were enrolled in this cross-sectional study during December,2012 and January,2013.Demographic information,health status and needs of and intent to long-term care were learned through a questionaire survey.Chi-square test and muhiple non-conditional logistic regression analysis were used to identify the factors that were related to the respondents' selection.Results Nearly 6.6％ (61/1016) participants showed needs for long-term care.82.3％ (841/1013) respondents preferred household-based long-term care,while 7.53％ (77/1013) preferred community-based long-term care.In single factor analysis,education level,occupation,household income,living conditions,number of children living together,medical insurance,pension insurance,chronic diseases and self-report hearing ability,taste and touch were related with longterm care needs (x2values were 33.03,136.17,99.32,88.83,58.07,147.71,108.11,9.85,33.78,30.45 and 22.22,respectively; all P＜0.05).Multivariate analysis showed that occupation,income per capita,spouses living conditions,new corporative medical systems and self-report visual status were correlated with household-based long-term care (odds ratio (OR) were 2.48 (95％ confidence interval (CI) 1.21-5.10),0.82(0.71-0.95),1.64 (1.08-2.49),4.78 (2.93-7.82) and 0.72 (0.59-0.89),respectively).Conclusion Householdbased long-term care and health management system may be needed and chosen by the elderly living in rural areas of Beijing.

Objective To analyze the skeletal characteristics of temporomandibular joint in patients with unilateral posterior scis-sors bite by using the cone-beam computed tomography(CBCT) .Methods Thirty-five patients of Angle class Ⅰ were scanned by CBCT (19 cases with unilateral scissors bite as the experimental group and 16 cases without scissors bite as the control group ) The CT images were reconstructed into 3D computer models by using the Dental Volume Reformat Function of the Ondemand 3D pack-age .9 anatomical landmarks were located and all data of 11 measured value were statistically analyzed .Results There were statisti-cal differences in the skeletal characteristics of temporomandibular joint in the scissors-bite side of the experimental group compared with those in the non-scissors-bite side (P<0 .01) .The side-to-side differences of the skeletal characteristics of temporomandibular in the controlled group were not statistically significant (P>0 .05) .There were statistical significances in the skeletal characteris-tics of temporomandibular joint of the controlled group compared with those in the scissors-bite side of the experimental group ,and the same with those in the non-scissors-bite side (P<0 .01) .Conclusion The CBCT is an effective tool to analyze the skeletal char-acteristics of temporomandibular joint characteristics .There were differences in the morphology of the condyle and the glenoid fossa of patients with unilateral posterior scissors bite .

Objective To learn current status of health management services in the elderly individuals living in rural areas of Beijing,so as to provide evidence for healthcare improvement.Methods The elderly residents aged 60 or above from several rural districts of Beijing were selected by using multistage random sampling method in January 2013.The health management programme those participants obtained and their satisfactory scale were evaluated.Results A total of 719 of 1 023 (71.3％) individuals had health check-up over the past years.Only 4 subjects (0.4％) obtained mental health management,and 35 (4.9％) finished follow-up studies for chronic diseases.The percent of the elderly who received physical examination,profiles of medical record,health education,medical consultation,health evaluation,cancer screening or vaccination showed statistically significant difference of regional distribution (x2 values were 15.7,39.4,30.5,25.2,24.1,18.4 and 19.3,respectively; all P＜0.05).Sites for health check-up,profiles of medical record and health education were also found to have statistically significant regional distribution difference (all P＜0.05).In ordinal logistic regression analysis,age,occupation,health insurance,self health assessment and health medical affected satisfaction of the respondents with health management.Conclusions Our investigation shows a gap between current health management programme and national standard requirement for equal public health services,and the elderly's satisfaction with health management needs to be improved.

Objective To observe the value of subregional non-contrast CT(NCCT)radiomics features based on habitat imaging technology for predicting hematoma expansion(HE)in patients with spontaneous intracranial hemorrhage(sICH).Methods Data of 228 sICH patients with negative conventional imaging signs were retrospectively analyzed and divided into HE group(n=99)or non HE(NHE)group(n=129)based on the occurrence of HE nor not.also divided into training set(n=182)or test set(n=46)at a ratio of 8:2.Clinical data,NCCT data and laboratory examination results were compared between groups.Logistic regressive analysis was performed to screen the impact factors of HE.ROI of whole hematoma(ROIwhole)was sketched and clustered into 3 sub-regions(ROIsub1,ROIsub2 and ROIsub3,the latter located in the critical area between hematoma and brain tissue)with habitat imaging technology,and radiomics features of ROI were extracted and screened.Then 4 prediction models were constructed based on the above 4 ROI,and the efficacy of each model for predicting HE was analyzed.Results The fasting blood glucose in HE group was higher than that in NHE group(t=2.047,P=0.041),which was not independent impact factor for predicting HE in sICH patients(P=0.070)according to logistic regression analysis.The area under the curve of ROIsub3 radiomics model for predicting sICH HE in training and test set was 0.945 and 0.863,respectively,not significantly different with that of ROIwhole(0.921,0.813),ROIsub1(0.925,0.807)nor ROIsub2(0.909,0.720)(all P＞0.05).Decision curve analysis showed that ROIsub3 radiomics model could bring greater benefits than the other 3 models.Conclusion NCCT radiomics features of the critical area between hematoma and brain tissue based on habitat imaging technology had high value for predicting HE in sICH patients.

Objective:To investigate the effect of 125I particles in alveolar echinococcosis with the animal model (nude mice and Sprague Dawley rats). Methods:Twenty 10 weeks nude mice with body weight ranged from 20 to 24 g were divided into three groups. Sixteen nude mice were divided into experimental group ( n=8), puncture group ( n=4) and model group ( n=4). There was no intervention in the model group and only particle puncture needle was used in the puncture group. 125I particles were implanted in the experimental group. 14 male Sprague Dawley rats without specific pathogen, with body weight 280-320 g, 12 weeks old, were used to construct the model of hepatic alveolar echinococcosis. Then the rats were divided into intervention group ( n=10) and control group ( n=4). In the intervention group, 125I particles were pushed into the lesions. The abdomen was only open and closed in the control group. All the mice were sacrificed 45 days after intervention. The tumor size was measured. The activity of protoscolex and pathological changes of Echinococcus multilocularis in each group were observed. Results:At the timepoint of 22nd, 30th and 40th day of intervention, the largest diameter of tumor in nude mice experimental group was (10.7±5.2) mm, (10.9±5.0) mm, (8.5±4.3) mm, smaller than that in puncture group (24.5±4.4) mm, (25.4±4.1) mm, (31.4±2.8) mm and model group (22.5±7.3) mm, (25.0±5.4) mm, (26.7±6.3) mm, with statistically significant difference ( P<0.05). The number and activity of protoscoleces in experimental group were lower than those in puncture group and model group. Under the light microscope, the structure of echinococcus vesiculae and its body in the experimental group was obviously destroyed, and the cuticle and germinal layer of echinococcus vesiculae in the puncture group and the model group were normal, with multiple intact protoscoleces. The pathological changes of Sprague Dawley rats in the intervention group and the control group were basically the same as those in the nude mice model. Conclusion:The 125I particle radiation effect can kill Echinococcus multilocularis protoscoleces and inhibit the growth of alveolar echinococcosis.