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

ObjectiveTo evaluate the efficacy and safety of tirofiban in treatment of ST segment elevation acute myocardial infarction(STEAMI) no-reflow and acute thrombosis after emergency percutaneous coronary intervention(PCI). MethodsForty patients which were made definite diagnosis of STEAMI were intra-coronary artary injection fortirofiban after emergency PCI stenting occured no-reflow and acute thrombosis. First,the dose of 0.4μg·kg-1·min-1 was given from intra--coronary artary injection of tirofiban within three minutes, after 30min the dose were given 0.1μg·kg-1·min-1 for 48 hours. ResultsThe no re-flow and acute thrombosis was completely disappeared within five minutes,at the time,side effect with in one week was not observed. ConclusionsTirofiban treatment by direct injection in coronary arteries combined with emergency PCI, can increase the repeffusion rate of infarction related vessel in AMI patients,and improve TIMI reflow. This reperfusion method was effective and safe.

Objective To explore the significance of palpation-negative breast tumor resection with ultrasound-guided methylene blue labeling and percutaneous suture traction.Methods 46 cases of small breast tumors with the diameter from 0.5 cm to 1.0 cm were double labeled with methylene blue under the guide of ultrasound l hour preoperatively.The tumors were fixed,drew outward with percutaneous suture and resected accurately.All the 46 cases were rechecked by ultrasound to verify whether residual or false resection occurred 1 month later.Results All the 58 tumors of the 46 patients were accurately resected.No residue or false resection occurred.The average operation duration was 10 min to 20 min.Conclusion Palpable-negative breast tumor resection with ultrasound-guided methylene blue labeling and percutaneous suture traction has the advantages of small invasion,accurate positioning and short operation duration.

Objective We invented mammary lump skin-positioning membrane (named scare membrane) to facilitate localization of mammary lump during ultrasound scan.This study is to measure the radius of mammary of Chinese adult women for designing different types of skin-positioning membrane.MethodsThe radius of mammary glands in 236 cases of adult females was detected with color Doppler ultrasound at 5 different clock positions:12:00,3:00,6:00,9:00 and 10:30 or 1:30.SPSS 16.0 statistical software was used to analyze the data.The cut-off values of mammary glands radius at 99％,95％,75％ and 50％ were calculated.Paired t tests or nonparametric tests (relative sample rank sum tests) were used to verify the consistency of mammary gland radius between left and right sides.ResultsThe cut-off value of 95％ mammary gland radius was:7.700cm at 12:00,7.810 cm at 13:00,8.100 cm at 3:00,5.330 cm at 6:00 and 6.300 cm at 9:00 for left mammary gland ; 7.500 cm at 12:00,6.015 cm at 3:00,5.500 cm at 6:00,8.510 cm at 9:00 and 7.930 cm at 10:30 for right mammary gland.In comparison of left and right mammary gland radius,the difference had statistical significance between the group of left side at 1:30 and right side at 10:30,the group of left side at 3:00 and right side at 9:00(P ＜0.05).The right mamma was relatively larger.The cut-off values of the right mamma at the above two clock points were taken as radius of scale membranes while the average of percentage cut-off values at 12:00,3:00 of both mammas,left side at 9:00 and right side at 3:00 are taken as radius of scale membranes.ConclusionsAccording to the cut-off values of 99％,95％,75％ and 50％ radius of adult female mammary glands,mammary lump skin-positioning membrane radius can be classified into 4 size-types:extra large,large,medium and small.The precise classification of radius of mammary scale membranes according to mammary glands of adult females provides convenience for production,manufacture and clinical application of mammary lump skin-positioning membrane.

Objective To study the effect of combined atorvastatin and ezetimibe pretreatment on perioperative hs-CRP after elective PCI.Methods One hundred and fifty-six patients with typical chronic stable angina pectoris were randomly divided into atorvastatin treatment group (n=78) and combined atorvastatin and ezetimibe treatment group (n=78).Their serum hs-CRP,TC and LDL-C level was measured before PCI,at hours 8,24,48 and on day 7 after PCI.Results In comparision with pre-operation,the serum TC and LDL-C levels were significantly lower in two groups (P＜0.01) and in combined atorvastatin and ezetimibe treatment group than in atorvastatin treatment group on day 7 after PCI (P＜0.05).The serum hs-CRP level was significantly higher in two groups at 8 h after PCI than before PCI,reached its peak at 24 h after PCI,continued to increase at 48 h after PCI (P＜0.01),no significant difference was found between the two groups on day 7 after PCI (P＞0.05).The average serum hs-CRP level was lower in combined atorvastatin and ezetimibe treatment group than in atorvastatin treatment group at hours 8,24 and 48 after PCI (P＜0.05) with no significant change found between the two groups on day 7 after PCI (P＞0.05).Conclusion The effect of combined atorvastatin and ezetimibe pretreatment is better than that of atorvastatin alone on perioperative acute inflammatory reactions after PCI.