ABSTRACT
Objective: To evaluate the remineralizing effe ct of glass ionomer cement (GIC),calcium hydroxide(Dycal)and zinc phosphate ceme nt on soft dentin. Methods:Standard cavity of 1 mm?2 mm was pre pared on each of the 60 premolars extracted for orthodontic treatment. The teeth were randomly divided into three groups with 20 in each after demineralization ,the cavities were blocked by GIC, Dycal and zinc phosphate cement respectively and filled with zinc oxide. All the teeth were dipped in man-made saliva for 3 0 days.Then the samples were sectioned, microradiographied and the mineral conte nt were determined by microdensitometry. Results:The remineraliz ing rate in the group of GIC, Dycal and zinc phosphate cement was 31.22%,13.19 % and 8.92% respectively (P
ABSTRACT
Objective To investigate the onset and risk factors of the transient ischemic attack of vertebrobasilar artery vertige in old patients. Methods Patients were divided into group A, group B, group C based on attack times of vertige and whether cerebral thrombosis was formed within half a year. Blood biochemistry index, blood pressure variation, carotid ultrasonic examination results in the first 24 hours were compared. Results High sensitive C-reactive protein (hs-CRP), systolic blood pressure (SBP), diastolic blood pressure(DBP), blood sugar(BS), cholesterol(TC), triglyceride(TG), common carotid artery resistance of group A index(CCARI), internal carotid artery resistance index(ICARI) and atherosis plaque index in the first 24 hours were significantly lower than those of group C (P0.05). Logistic regression indicated that hs-CRP, DBP, BS, TC, CCARI, ICARI and plaque index were correlated with risk factors of the transient ischemic attack of vertebrobasilar artery vertige and cerebral thrombosis in old patients. Conclusion hs-CRP, SBP, BS, TC, CCARI, ICARI and plaque index elevation might be an early warning index for the unstability and easy drop of the carotid's plaque.