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Objective To understand the pathogen distribution situation among the children inpatients with hand ,foot and mouth diseases(HFMD) in Guiyang area during 2012 to provide the basis for the diagnosis ,treatment and prevention .Methods The data in 3 179 cases of HFMD were collected .The fluorescence quantitative RT‐PCR was adopted to perform the genotyping on universal enterovirus ,enterovirus 71(EV71)and Coxsackie virus A16(CA16) .Results A total 3 179 samples of HFMD were col‐lected ,among them ,151 cases (4 .75% ) were CA16 positive ,331 cases (10 .41% ) were EV71 positive ,7 cases (0 .22% ) were CA16 and EV71 co‐infection ,and 897 cases(28 .22% )were the other enterovirus .The whole year had 2 peaks of onset ,which were April to July and October to November .The onset age focused on the children aged under 5 years old (96 .16% ) ,among them ,0-3 years old had the highest onset ,moreover male children were more than female .Conclusion The etiology distribution of children HFMD in Guiyang area during 201 was dominated by the other genotypes of enterovirus and EV71 .
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Objective:To investigate the stress distribution of mandibular implant-supported complete overdenture and supporting tissue with different location of implants.Methods:By three-dimentional finite element method, the stress distribution in the supporting tissue and overdenture supported by implants located in the interforaminal region or bilateral canines and first molars area was analyzed.Results:The overdenture supported by implants located in the interforaminal region showed poor oblique loading resistance, the peak value of stress in implant-bone interface was 2.4-9.2 times higher than that of vertial loading. Under vertical or oblique loading conditions, there was higher stress concentration in implants and base plates. The overdenture supported by implants located in bilateral canions and first molars area manifested better mechanical characteristic, the peak value of stress in supporting tissue was in the physiological range of bone.Conclusion:The location of implants in molar area can enhance the ability of overdenture to resist oblique loading, reduce the peak value of stress in implant-bone interface.
