ABSTRACT
Objective A study was conducted to compare the effect of different enamel remineralization periods after erosion on the depth of brushing abrasion. Methods Ten volunteers were selected for a 4-day experiment. A total of 60 enamels were randomly assigned into six groups (A-F) and placed in intraoral palatal devices. On the first day, the palatal devices were placed in oral cavity (24 h) . On the following three days, brushing experiments were performed extraorally, two times per day. The specific experimental method of brushing follows these next steps. First, the group F specimens were covered with a film of wax, and then acid etched for 2 min. Subsequently, the film of wax was detached. The groups from A to D were brushed after remineralization at the following time intervals: group A, 0 min; group B, 20 min; group C, 40 min; group D, 60 min. Erosion and remineralization were performed on group E, but without brushing. Remineralization was performed on group F, but without acid etching and brushing. The depth of enamel abrasion was determined by a mechanical profilometer. The surface morphology of the enamel blocks was observed using a scanning electron microscope. Results 1) The depth of abrasion was different in varied enamel remineralization time after acid etching. The statistical significant differences between groups were as follows. 2) When the time of enamel remineralization after acid etching was short, the surface depression in the electron microscope was deep, and the surface morphology was rough. Conclusion Brushing immediately after acid etching would cause much serious abrasion to the enamel surface. Brushing after 60 min can effectively reduce the abrasion of acid etching enamel.
ABSTRACT
Objective To survey on utilization of hospital beds in rural and urban community health centers in Shanghai.Methods The hospital beds utilization was investigated in one rural and one urban community health service centers in Shanghai.The data of hospitalized patients in a selected day were surveyed with self-made questionnaire,including the demographic information of patients,the diseases category,the length of hospital stay,self-care ability of daily life (ADL score),the purpose of hospitalization,and the management after discharge.Results Patients aged over 60 y accounted for 100.0％ (138/138) in urban center and 98.7％ (76/77)in rural center.The three top disease categories were all cardio or cerebrovascular diseases in urban center accounting for 86.9％ (120/138),while those in rural center were hypertension,cerebral infarction and acute/chronic bronchitis (or tumor)accounting for 65.0％ (50/77).The mean length of hospital stay in urban and rural centers were 609.6 d and 253.8 d,respectively (F =2 604.00,P =0.000).Patients with severe dysfunction in urban and rural centers accounted for the 84.0％ (116/138) and 32.5％ (35/77),respectively (x2 =80.911,P=0.000).Patients not willing to be discharged in urban and rural centers accounted for 87.7％(121/138)and57.1％ (44/77),respectively in city and rural centers(P ＜0.05).Conclusions The wards in community health centers mainly serve the elderly patients.There are differences in purpose of hospitalization,length of hospital stay,ADL scores of patients between rural and urban community health centers.
ABSTRACT
Objective To survey on the knowledge,attitude and practice about hypertention in elderly patients and its relation to blood pressure control.Methods A sampling survey on the knowledge,atitude and practice about hypertention were carried out in a target population of 47 572 elderly hypertensive patients from 5 communities in Xuhui District of Shanghai during May 2011 to July 2011.Total 3800 questionairres were distributed and 3328 responded with a response rate of 87.5％.Results Among 3328 responders,3036 were aged above 65 years with a mean age of (76 ±7) years and 43.3％ were males.The rates of knowledge about hypertension were 88.5％-97.8％.General practitioners in out-patient service were the major source of knowledge.Raults revealed that 81.9％ had received health education before;81.8％ requied a regular health education; 67.2％ had self-tested blood pressure weekly; 89.6％ controlled salt intake; 66.8％ attended outdoor activities weekly with (5.6 ±2.1) times a week and (45 ±28) min each time.The blood pressure control rate in uncomplicated hypertensive patients was higher than those complicated with diabetes,coronary heart disease or stroke (62.3 ％ vs.17.0％,P ＜ 0.01).Knowing high blood pressure was related to salt intake (OR =3.364,P ＜ 0.01),hoping a regular health education about hypertension (OR =1.718,P ＜ 0.01) were factors contributing to blood pressure control in uncomplicated hypertensive patients; while self-testing blood pressure once or twice a month(OR =2.572,P ＜ 0.01)was contributing factor to blood pressure control in complicated hypertensive patients.Conclusions Elderly hypertensive patients from communities in Shanghai have enough knowledge,positive attitude but lack practices.General practitioners should carry out personalized and stronger health education focued on behavioral changes for those patients.