Child ; Extraoral Traction Appliances ; Humans ; Molar ; Orthodontic Wires ; Orthodontics, Interceptive ; instrumentation ; Prognosis ; Time Factors ; Tooth Crown ; surgery ; Tooth Eruption, Ectopic ; surgery ; therapy ; Tooth Movement Techniques ; instrumentation ; methods

Objective To investigate the long-term protective effects of the waistband onto lumbar spins.Based on the practical situation,to search for some effective and convenient methods,such as wearing waistband and mutual massage,to prevent from lumbago for the army drivers worked in plateau.Methods 372 army drivers,young males,healthy and all worked in plateau,ware involved as the treatment group in the present study.Another 545 army drivers with the similar physical qualities,also worked in plateau,were selected as the control group.For the treatment group,a kind of special waistband was employed for the drivers,and mutual massage on hack of each other was performed among them;while in control group the army drivers were given no measures for lumbar protection and lumbago pre- vention.All the drivers in the both groups ware in normal driving conditions.The therapeutic effects of the waistband and the lumbago symptoms were investigated by epidemiologic survey 16 months later,Results The epidemiologic survey results showed that the incidence of lumbago in the drivers of control group(72.8%)was significantly higher than that in the treatment group(30.9%,P

Objective: To develop a HPLC method for simultaneous determination of catechins (EGC、DC、EGCG、EC、GCG、ECG) and caffeine in tea polyphenols and to quantify seven ingredients in twenty nine batches of tea polyphenols samples from thirteen producers. Methods: The study was achieved using a C 18 column with a methanol water 0.1% formic acid gradient elution system. Results: The peak resolutions of seven ingredients in mixed standards were all above 2; The resolutions in samples were all above 1.5 except EGCG; The average recoveries were 98.56%～100.14%. Conclusion: This method is accurate, stable, reproducible and suitable for quality control of tea polyphenols; the variations of contents are obvious among tea polyphenols samples from different even the same producers.

This article stated the status,major problems and methods in medical professional English teaching.The effective ways might be by means of training teachers,writing suitable textbooks,providing professional English speaking environment and improving model of teaching.

AIM: To discuss the application of overlapping ratio to the fingerprints of plant and plant extract. METHODS: We took the HPLC fingerprints of green tea and tea polyphenols for decision procedure. RESULTS: Overlapping ratio could be applied to selecting representative samples for characteristic fingerprints of green tea and tea polyphenols,and could be used to deduce the raw material,process and producer of tea polyphenols.(CONCLUSION:) Overlapping ratio can be used to choose the suitable samples for establishing the characteristic fingerprint spectrum,and can supply references to relationship investigation among products,raw material and process.

Adolescent ; Aged ; Aspergillosis ; microbiology ; pathology ; Aspergillus ; isolation & purification ; Brain Diseases ; drug therapy ; microbiology ; pathology ; surgery ; Diabetes Complications ; microbiology ; Diagnosis, Differential ; Female ; Humans ; Male ; Mucorales ; isolation & purification ; Mucormycosis ; drug therapy ; pathology ; surgery ; Nose Diseases ; drug therapy ; microbiology ; pathology ; surgery

objective:To study the etiopathogenisis、clinical features、diagnosis and treatments of monostotic fibrous dysplasia of the sphenoid sinus. Method:Two cases of monostotic fibrous dysplasia of the sphenoid sinus without any symptoms was reported with relevant literature review.Result: No aggravation was found after 6 months-follow-up.Conclusion:The cranial fibrous displasia has low incidence rate with non-specific symptoms and high rate of misdiagnosis. The monostotic fibrous dysplasia of the sphenoid sinus without any symptom is rarely seen clinically. Imageological examination,for example,CT and MRI,is valuable for the diagnosis of this disease. The histopathological evidence is absolutely necessary to make definite diagnosis. The conservative treatment may be chosen for the asymptomatic cases. Nasal Endoscopic surgery can not only remove the diseased region but also make diagnosis.The long-term follow-up should be carried out in all of these patients.

Objective To explore risk factors for type 2 diabetes mellitus complicated with gallstone disease. Methods The clinical data of 429 type 2 diabetes mellitus patients complicated with gallstone disease (case group) and 2145 type 2 diabetes mellitus patients without gallstone disease (control group) were collected from the Health Center of Peking Union Medical College Hospital from January 2007 to May 2010. According to sure (SBP), diastolic blood pressnre (DBP), fasting blood glucose (FBG), total cholesterol (TC), Triglyceride (TG), high-density lipoprotein cholesterol (HDL-CH), low-density lipoprotein cholesterol (LDL-CH) and body mass index (BMI) were statistically analyzed by fourfold table chi-square test or conditional Logistic regression.Results Univariate analysis showed that there was a significant difference in the levels of SBP, FBG, TC, HDL-CH and BMI between the case group and the control group (x2 =20.323, 4.365, 4.028, 7.049, 7.319, P＜0.05). Multivariate analysis confirmed that SBP, TC, HDL-CH and BMI were risk factors for gallstone disease in patients with type 2 diabetes mellitus (x2 = 18. 047, 6. 905, 12. 884, 7. 557, P ＜ 0. 05). Conclusion Increased SBP, TC and BMI and decreased HDL-CH may be the risk factors for type 2 diabetes mellitus complicated with gallstone disease.

Insulin resistance, lipid metabolism disorders, independent autonomic neuropathy are high risk factors for gallstone formation in type 2 diabetic patients. In recent years, there have been a lot of new developments on the relationship between type 2 diabetes and gallstones, such as adiponectin, leptin and metabolic syndrome, etc. Based on these studies, the risk factors of type 2 diabetes complicated with gallstones are summarized in this paper.

Objective To determine the risk factors of gallstones. Methods A case-control study was conducted on 4087 patients with gallstones (the study group) and 20435 individuals without gallstones (the control group) at the Health Center of Peking Union Medical College Hospital (PUMCH) between January 2007 to May 2010. Using age and sex, the study and the control groups were matched in 1 : 5 ratio. Data were statistically analyzed using Chi-square test and conditional logistic regression.Results Univariate analysis showed significant differences in diabetic mellitus (DM), systolic blood pressure (SBP), diastalic blood pressure (DBP), triglyceride (TG), high density lipoprotein cholesterol (HDL-CH) and body mass index (BMI) between the study and the control groups (P＜0.05). Multivariate analysis confirmed that DM, SBP, HDL-CH and BMI were associated with gallstones, and their adjusted odds ratio (95％ confidence interval) were 0. 825 (0. 736 ～0. 925), 0. 908 (0. 828～0. 996), 1. 211 (1. 056～1. 389) and 0. 746 (0. 691～0. 805), respectively.The incidences of total cholesterol (TCH) and low deasity dipoprotein cholesterol (LDL-CH) were not significantly different between the two groups (P＞0.05). ConclusionsDM、SBP、HDL-CH and BMI were found to be the risk factors for gallstones. To prevent gallstones, weight reduction, blood pressure control and normalization of blood lipid are important measures.