Objective:To analyze the biomechanical stress distribution on the sagittal fractured of the mandibular condyle(SFMC) fixed by double plates in 3 different ways.Methods:The fixation finite element models with double straight plates(SS),one straight and one L-form plates(SL),and double L-form plates(LL)were established.The biomechanical stresses on condyle were calculated with finite element analysis.Results:In the model of SS fixation the maximum equivalent stress (MES),maximum total displacement (MTD)and maximum total corner(MTC)of condylar stump were 525.475 MPa,0.902 2 mm and 0.260 1°;MES,MTD,and MTC on fractured free-end were 4.425 MPa,0.882 7 mm and 0.019 9°,respectively.In the model of SL fixation MES,MTD and MTC on condylar stump were 1 135 MPa,0.9367 mm and 0.126 1°;MES,MTD and MTC on fractured free-end were 2.656 MPa,0.887 1 mm and 0.016 9°,respectively.In the model of LL fixation MES,MTD and MTC on condylar stump were 2 208 MPa,0.923 8 mm and 0.172 2°;MES,MTD and MTC on fractured free-end were 14.66 8 MPa,0.876 6 mm and 0.018 1°,respectively.Conclusion:Double L plates fixation is a proper way for SFMC.

Objective To observe the efficacy of bacterial lysate(bronchovaxom) in the acute phase of respiratory tract infection and to prevent recurrent respiratory tract infections.Methods From April 2014 to A-pril 2015,in pediatric respiratory ward of Shengjing hospital of China Medical University,80 children with recur-rent respiratory tract infection were randomly divided into treatment group and control group,with 40 cases in each group.The control group patients were received routine anti-infection and symptomatic treatment,the treat-ment group patients were received oral bacterial lysis products for 3 months on basis of the conventional anti-in-fection and symptomatic treatment.To observe the duration of clinical symptoms of two groups of children with respiratory tract infection in the acute phase,antibiotic use and hospital stay changes;observed the number of re-spiratory infections occurred again within 1 year;measured the levels of serum immunoglobulin before and 6 months after treatment. Results Compared with the control group,the duration of symptoms such as fever, cough and other symptoms of respiratory tract infection,the duration of pulmonary rales,the use of antibiotics and the length of hospital stay were significantly shortened in the treatment group,and the number of respiratory infections was significantly reduced,the difference significant(P<0.05).After treatment,the levels of IgG and IgA in the treatment group were significantly higher than those before treatment,and the immunoglobulin IgG and IgA in the treatment group were significantly higher than those in the control group(P<0.05).Conclusion Oral bacterial lysis products to prevent respiratory infections,not only can reduce the duration of various clini-cal symptoms of respiratory tract infection,shorten the use of antibiotics and hospital stay,and can improve chil-dren's immunity,reduce the number of respiratory infections again.

Objective: To investigate the average dietary nutrients intake status among Chinese residents between 2010-2012, and to compare the difference between rural and urban areas. Methods: Data were collected from Chinese Nutrition and Health Surveillance between 2010-2012. Based on regional features and economic development levels, China's county-level divisions were classified into four types: big city, medium and small city, ordinary rural area and poor rural area. A total of 62 857 valid subjects, including 14 017, 16 539, 19 910 and 12 391 respondents in each group separately, were enrolled by Multi-stage stratified proportion to the population cluster random sampling method. The dietary survey was conducted by recalling the 24 h diet in 3 consecutive days and weighting condiment. The daily dietary intake of energy, macronutrient, dietary fiber, vitamin, and mineral substance per resident were calculated based on China Food Composition. Results: The average energy intake per resident in Mainland China was 9 047.1 kJ, with highest (9 719.3 kJ) in poor rural area and lowest (8 490.4 kJ) in medium and small city. The average dietary protein intake was 64.2 g, with highest (73.9 g) in big city and lowest (60.7 g) in poor rural area. The average dietary fat intake was 79.7 g, with highest (89.4 g) in big city and lowest (70.6 g) in poor rural area. The average intake of micronutrients of vitamin A, vitamin B₂, vitamin C, calcium, iron, phosphorus, zinc was separately 441.9 μg, 0.8 mg, 80.1 mg, 364.3 mg, and 21.4 mg; which were lower than Chinese Dietary Reference Intakes. The percentage of population whose average intake of vitamin A, vitamin B₂, vitamin C, calcium were lower than estimated average requirement was separately 77.0%, 90.2%, 67.7%, and 96.6%. Conclusion The supply of 3 macronutrient was sufficient in mainland China. However, it was a common issue that there was excessive intake of fat but deficient intake of micronutrients such as vitamin, calcium, iron and zinc. There were differences in nutrition intake among big city, medium and small city, ordinary rural area and poor rural area.

Objective:To explore the relationship between cardiac discomfort symptoms, fear of disease progress and post-traumatic stress disorder (PTSD) in patients with acute myocardial infarction(AMI) after discharge, and to clarify main intervention direction of PTSD in patients with AMI.Methods:Patients with AMI who were discharged from Tangshan Gongren Hospital between 1 month and 1 year were selected from November 2019 to November 2020.The cardiac discomfort symptoms scale, fear of progress questionnaire(FoP-Q-SF) and post-traumatic stress disorder self-rating scale(PTSD-SS) were used to investigate cardiac discomfort symptoms, fear of disease progress level and post-traumatic stress disorder status.Spearman rank correlation analysis was used to analyze the relationship between cardiac discomfort symptoms, fear of disease progress and post-traumatic stress disorder by SPSS 24.0 software. The mediating effect of fear of disease progress was analyzed by AMOS 24.0 software.Results:The PTSD score was (32.78±12.38) of patients with AMI discharged from hospital for 1 month to 1 year and the incidence of PTSD was 12.3%.Spearman correlation test showed cardiac discomfort symptoms and fear of disease progress were positively correlated with PTSD( r=0.530, 0.723, both P<0.01) and cardiac discomfort symptoms was positively correlated with fear of disease progress( r=0.518, P<0.01). Mediating effect test showed that fear of disease progress was a complete mediator between cardiac discomfort symptoms and PTSD. Conclusion:Cardiac discomfort symptoms can affect PTSD through a complete mediator of fear of disease progress.

OBJECTIVETo analyze the mean population intake of salt in Chinese adults in 2010-2012.

METHODSData were from the Chinese Nutrition and Health Surveillance in 2010-2012. The samples were selected through the method of probability proportion to size (PPS). The study objects were 55 531 adults aged 18 and over from 150 sites in 31 provinces, autonomous regions or municipalities in China. The information of oil, salt and other condiments for household was from the 3 d food weighed record. The average of salt intake for individuals was calculated based on the energy percentage in one family. The results presented the level of salt intake (x ± Sx) by analyzing the different demography characteristics. The results were calculated using complex weighting by the population data from National Bureau of Statistics in 2009.

RESULTSThe intake of salt was (9.6 ± 0.3) g/d and it was higher in men ((10.4 ± 0.4) g/d) than that in women ((8.8 ± 0.3) g/d). The intake in the age group of 40-49, 50-59 and 60-69 was (9.9 ± 0.5) g/d, (10.3 ± 0.4) g/d and (9.9 ± 0.3) g/d, respectively. The adults in rural ((10.2 ± 0.3) g/d) had a higher salt intake than that of urban ((9.0 ± 0.5) g/d). An average of salt intake was increased gradually in big city ((7.9 ± 0.3) g/d), medium /small city ((9.2 ± 0.6) g/d) , general rural ((9.9 ± 0.4) g/d) and poor rural ((10.8 ± 0.7)g/d).

CONCLUSIONThe mean salt intake among Chinese adults was still in a very high level. Something should be done to reduce the salt intake for the government and policy-makers.

Adult ; Aged ; China ; Diet ; Family Characteristics ; Female ; Humans ; Male ; Middle Aged ; Nutrition Surveys ; Nutritional Status ; Rural Population ; Sodium Chloride, Dietary ; Urban Population