RESUMO
Objective @#To compare the depth of the curve of Spee in Angle classⅡ malocclusion patients with different vertical skeletal patterns and to investigate the relationship between the depth of the curve of Spee and dentofacial morphology. @*Methods @#101 Angle classⅡ malocclusion patients were selected and randomly divided into 3 groups based on their GoGn-SN angles-high angle, average angle and low angle. Lateral cephalograms and dental models of all patients were evaluated to analyze Spee curve depth difference among different groups, Correlation analysis and a multiple linear regression analysis were performed to determine the relationship between the depth of the curve of Spee and all selected cephalometric variables.@*Results@# There was statistical difference in depth of the curve of Spee among different groups P < 0.05. The depth of the curve of Spee was least in the high angle group and greatest in the low angle group. GoGn-SN angle had statistically significant negative correlation with the depth of the curve of Spee, r = 0.428, P = 0.000, ODI, S-Go/N-Me、L7-GoGn angle had statistically significant positive correlation with the depth of the curve of Spee, r = 0.381, 0.357, 0.333, P = 0.000, 0.000, 0.001. The multiple linear regression analysis with stepwise method showed GoGn-SN angle had significant contribution to the depth of the curve of Spee. In Angle classⅡ malocclusion patients, there was statistical difference in depth of the curve of Spee among different vertical skeletal patterns@*Conclusion @#The depth of the curve of Spee is correlated with dentofacial morphology, GoGn-SN angle had significant contribution to the depth of the curve of Spee, which should be taken into consideration during orthodontic diagnosis and treatment.
RESUMO
This meta-analysis was carried out to evaluate the relationship between NM23 expression and the prognosis of patients with colorectal cancer.We searched PubMed,EMBASE and Web of Science for relevant articles.The pooled odd ratios (ORs) and corresponding 95％CI were calculated to evaluate the prognostic value of NM23 expression in patients with colorectal cancer,and the association between NM23 expression and clinicopathological factors.In total,2289 patients were pooled from 24 available studies.The incorporative OR combined by 16 studies with overall survival showed that high NM23 expression was associated with better overall survival (OR=0.67,95％CI:0.49-0.93,P=0.02,I2=56％,Ph=0.004).And a new estimate without heterogeneity was produced when only combining high-quality studies (OR=0.70,95％CI:0.56-0.86,P=0.0007,I2=46％).In disease free survival (DFS),we also obtained a good prognosis (OR=0.30,95％CI:0.14-0.68,P=0.004).Although we failed to find any significance in N status (P=0.10),elevated NM23 expression was related to well tumor differentiation (OR=0.60,95％CI:0.44-0.820,P=0.001) and Dukes' A&B (OR=0.55,95％CI:0.32-0.95,P=0.03).These results indicated that over-expressed NM23 might be an indicator of good prognosis,well tumor differentiation and Dukes' A&B of patients with colorectal cancer,but no significance was found in N status.