ABSTRACT
Objective To compare the applicatied effect of two kinds of post core porcelain fused to metal crown for restoration of residual crown of first molar .Methods 52 patients with residual crowns of first molars (98 teeth) were selected.According to the random numerical table method ,they were divided into group A[post core crown of metal casting in 27 cases ( 49 teeth ) ] and group B [ post core crown of screw thread amalgam in 25 cases (49 teeth)].After a year of follow -up,the success rate of the two groups was compared .Results Metal casting core crown pile was broken at 0 in group A and at 3 in group B,the success rate of group A was 93.88％,and the success rate of group B was 79.59％,the difference was statistically significant between the two groups (χ2 =4.346, P<0.05).Conclusion The retention,resistance and durability of post core crown of metal casting is far superior to post core crown of screw thread amalgam ,and it is a more ideal repair method .
ABSTRACT
Objective To investigate the effect of XueBiJing injection(a concoction of Chinese herbs)on the expression of high mobility group box-1 protein(HMGB1)in the lung with acute lung injury of rats following delayed resuscitation after burn injury.Methods 78 male rats were randomly divided into sham scald group(n=18),scald group(n=30)and XueBiJing treatment group(n=30).In the scald group and XueBiJing treatment group,4ml/kg normal saline or XueBiJing was intravenously injected 2 hours after scald injury.In the latter two groups,rats were subjected to 30% TBSA full-thickness scald injury,and fluid resuscitation was delayed.The animals were sacrificed at 8h,24h and 72h after injury,respectively.Lung tissue samples were collected to determine the expression of HMGB1 mRNA and protein,and the activity of pulmonary myeloperoxidase(MPO).HMGB1 mRNA level was semi-quantitatively measured by RT-PCR using GAPDH as an internal standard,and protein expression of HMGB1 was determined by Western blot.Results Compared with sham scald controls,both mRNA and protein expressions of HMGB1 were significantly enhanced in the lung at 8-72h after scald injury(P