Humans ; Root Canal Filling Materials ; Root Canal Obturation ; methods ; Tooth Root ; physiopathology

Humans ; Root Canal Preparation ; adverse effects ; methods

Humans ; Root Canal Therapy ; adverse effects ; methods

Humans ; Root Canal Filling Materials ; Root Canal Therapy ; methods ; Tooth Root ; physiopathology

Humans ; Hypersensitivity ; diagnosis ; therapy ; Skin Tests

Child ; Contraindications ; Humans ; Immunotherapy ; adverse effects ; Rhinitis, Allergic, Perennial ; therapy

Child ; Humans ; Immunoglobulin E ; blood ; Rhinitis, Allergic, Perennial ; diagnosis ; Skin Tests

Objective To evaluate diagnostic value of X-ray computed tomography(CT) neck masses in children.Methods Clinic,pathologic diagnosis and CT scans of 26 patients from Jan.2004 to Jun.2006 with neck masses which location,density,edge and near construction were reviewed retrospectively.Results Seven cases in neck anterior area,13 cases in neck lateral area,6 cases in other areas or unconfirmed.Eight cases with lower density than cervical muscles,2 cases with same density,2 cases with higher density,14 cases with mixed density.Inflammatory masses were observed in 13 cases,congenital malformation in 11 cases,thyroiditis in 1 case,pharyngeal tumor-like proliferation in 1 case.Conclusion CT scan is the best choice of diagnosis of neck masses in children,and is valuable to diagnosis associated with history and physical examination.

ObjectiveTo investigate the necessary of letting the intelligent knee joint be adaptive to the road terrain and the key technology of knee moment control method. MethodsBased on data from gait analysis and the dynamic model of lower limb,the knee moments while people walking on the path of different terrain were obtained. Terrain identification method was based on the features of electromyography(EMG) signals of the thigh,and the EMG of some muscles was detected. The methods were applied to an intelligent trans-femoral prosthesis developed for tests in the laboratory.ResultsConsiderable variation of the knee moments appeared when people walking on the path of different terrain,as well as that of the features of EMG of some muscles.ConclusionIt is necessary to make the intelligent knee joint be adaptive to the road terrain,and it is possible to be achieved with satisfied motion of the leg and the trajectory of ankle joint by the intelligent transfemoral prosthesis being studied which can identify the features of EMG signals.

Forest musk deer (Moschus berezovskii), a rare wild medicinal animal, is listed under the category of the state key protected wildlife list of China. Musk, secreted by the musk glands, is with high economic and medicinal value and used as precious traditional medicine in China. In order to meet the needs of musk in Chinese traditional medicine, forest musk deer farming was conducted in 1950s, but the research progress on musk secretion mechanism was slow. Therefore, by reviewing the histological and anatomical structure of forest musk deer musk gland, the relationship between sex hormones and the musk secretion process, and the molecular mechanism of the musk secretion, the existing problems in investigating the musk secretion mechanism were analyzed and the development trends in this field were also discussed, in order to provide a reference for further studies on the musk secretion mechanism and improve musk production of forest musk deer.
Animals ; Deer ; metabolism ; Exocrine Glands ; anatomy & histology ; chemistry ; secretion ; Fatty Acids, Monounsaturated ; chemistry ; metabolism ; Male