Objective To compare the different accuracy of implant model made by the two types of silicone impressions.Methods Fifteen impressions of standard abutment were made separately by machine-mixed and hand-mixed,then made into super-stone models and the accuracy of the different impressions was compared.Results The two types of silicone impressions showed significant difference of the margin precision,while differences on the height,diameter and the width of abutment shoulder were not found.Conclusions The two methods both have ideal accuracy,but porcelain-fused-to-metal restorations require high accuracy of the model shoulder,which is not suitable to use machine-mixed silicone impression technology,and hand-mixed method can be used in fixed restoration,removable denture and implant level impression.

OBJECTIVE:To observe the therapeutic effect of compound glycyrrhizin combining ursodeoxycholic acid in the treatment of chronic hepatitis B.METHODS:87patients with chronic hepatitis B were enrolled to,on whom,the anti-viral therapy proved to be ineffective and who suffered a long-term abnormal liver functions,of the total,47were randomly as?signed to receive compound glycyrrhizin plus ursodeoxycholic acid(treatment group),and40to receive compound glycyrrhizin plus vitamin C(control group).Course of treatment for both groups was8weeks.RESULTS:As compared with the control group,the liver function and immune function for the treatment group had a better amelioration(P

Objective To retrospectively study the incidence and risk factors of thyroid disease induced by peginterferon plus ribavirin (Peg IFN/RBV) antiviral treatment in patients with chronic hepatitis C (CHC).Methods From January 2012 to December 2014,a total of 362 CHC patients were treated with Peg IFN/RBV antiviral therapy at Wuxi Fifth People's Hospital,among whom 315 patients were included in this study.Thyroid function,autoantibodies and thyroid ultrasound were measured at baseline,weeks 12,24 and 48.Comparisons between groups were performed using chi-square test for qualitative data and the unpaired t test for continuous variables.Results After treatment,thyroid dysfunction developed in 12.1％ of patients.Positive anti-thyroid peroxidase and anti-thyrobolulin antibodies were detected in 21％ of patients.The thyroid ultrasound changes developed in 14.9％ of the patients,among whom normal thyroid function and thyroid autoantibodies negative were detected in 8.7 ％ of patients.The titer of thyroid autoantibodies increased steadily from baseline to the end of treatment.Logistic regression analysis showed that positive thyroid autoantibody (OR =5.423,95％ CI:3.441 8.716),sustained virological response (OR=7.201,95％CI:6.231-10.206),female(OR=1.22,95％ CI:0.951-2.212) were the risk factors of thyroid dysfunction.Conclusions Peg IFN/RBV antiviral treatment increases the incidence of thyroid disease in CHC patients.Positive thyroid autoantibody,sustained virological response and the female gender are the risk factors of thyroid dysfunction.