Objective:To study the tooth movement in the orthodontic treatment by Empower appliance following tooth extraction. Methods:40 cases with bimaxillary dentoalveolar protrusion were divided into 2 groups(n =20).After extraction of all first premolars of each case,the patients were treated by Empower appliance and Damon3-Mx appliance respectively without palatal enhance measure. Before and after treatment the patients were examined by cephalometric roentgengraphy with 1 9 measurements,the data were analysed by independent sample t test.Results:Tooth indicators∠UI-SN,∠UI-PP,∠L1 -MP,∠U1 -L1 ,UIE-PTV and LIE-PTV before and after the treatment in each group,and the variations between the 2 groups were significantly different(P <0.05).UM-PTV,LM-PTV, UIA-PTV,LIA-PTV,UL-EP,LL-EP and Z Angle were significant changed after treatment(P <0.05),no significant difference was found between the 2 groups after treatment(P >0.05).Conclusion:Empower appliance is more effective than Damon3-Mx in the treatment of bimaxillary dentoalveolar protrusion by anterior tooth torque control,upper and lower front teeth adduction and improvement of soft tissue lateral profile.

Severe rotating maxillary central incisors were aligned by NiTi segmental arch,then 2 ×4 technique was applied to correct rota-ted teeth.The treatment was effective and convenient.

Objective To explore the expression of EphB4 and VEGF in esophageal cancer tissues and their relationship with microvessel density (MVD ) ,and analysis the curative effect of postoperative esophageal cancer radical under thoracoscope . Methods Theexpression of EphB4 and VEGF was detected by immunohistochemistry in tumor specimens from 76 cases of esopha-geal squamous cell carcinoma and paratumor normal specimens ,used CD34 as marker to count MVD .According to the situation of expression of EphB4 and VEGF ,we analysis their relationship with lymph node metastasis rate ,recurrence and 5-year survival rate . Results The positive expression rate of EphB4 and VEGF in cancerous tissue (57 .89% and 61 .84% ) ,were significantly higher than that in tissue adjacent to carcinoma(0 and 7 .89% )(P<0 .05) .The positive expression rate ofEphB4 and VEGF in high MVD values of patients (67 .44% and 76 .19% ) ,were significantly higher than thatin low MVD values of patients (45 .45% and 44 .11% )(P<0 .05) .The positive expression rate ofEphB4 and VEGF in the patientswith lymph node metastasis group and associ-ated with recurrence ,were significantly higher than that of group without lymph node metastasis and group without recurrence (P<0 .05) .The positive expression rate of EphB4 and VEGF in patients of greater than or equal to 5 years of survival rate(45 .00% and 45 .45% ) ,were significantly lower than in patientsof Less than 5 years of survival rate (80 .36% and 85 .19% )(P<0 .05) .Conclu-sion EphB4 and VEGF are highly expressed in esophageal cancer tissue ,which may be closely associated withmicrovessel density , and lymph node metastasis ,recurrence and 5 years survival rate ;the curative effect of positive expression rate of EphB 4 and VEGF is poor .

OBJECTIVETo explore the reasonable therapeutic strategy for different types of epicanthus.

METHODSPatients with epicanthus were classificated according to the shape, extent and inner canthal distance and treated with different methods appropriately. Modified asymmetric Z plasty with two curve method was used in lower eyelid type epicanthus, inner canthus type epicanthus and severe upper eyelid type epicanthus. Moderate upper epicanthus underwent '-' shape method. Mild Upper epicanthus in two conditions which underwent nasal augumentation and double eyelid formation with normal inner canthal distance need no correction surgery. The other mild epicanthus underwent '-' shape method.

RESULTSA total of 66 cases underwent the classification and the appropriate treatment. All wounds healed well. During 3 to 12 months follow-up period, all epicanthus were corrected completely with natural contour and unconspicuous scars. All patients were satisfied with the results.

CONCLUSIONSClassification of epicanthus hosed on the shape, extent and inner canthal distance and correction with appropriate methods is a reasonable therapeutic strategy.

Blepharoplasty ; methods ; Cicatrix ; Eyelids ; anatomy & histology ; surgery ; Humans ; Nose ; surgery

Objective To explore the clinical characteristics and diagnostic methods of cerebral schistosomiasis.Methods The data of CT,MRI and the cerebral spine fluid(CSF) immunoassay in 42 patients with cerebral schistosomiasis were analyzed retrospectively.Results Forty cerebral schistosomiasis patients were diagnosed by the iconography and immunoassay,1 by the postoperative pathological examination and 1 by diagnostic treatment with praziquantel.Conclusions CT and MRI are of great value to determination of the position and nature of the cerebral schistosomiasis.The sensitivity and accuracy of MRI are better for indicating the main pathological changes of the disease than those of CT.The CSF immunoassay plays an important role in the differential diagnosis of cerebral schistosomiasis.

Objective:To evaluate and analyze the clinical value of Gd-EOB-DTPA magnetic resonance imaging in the differential diagnosis of cirrhotic nodules and small hepatocellular carcinoma.Methods:A total of 40 patients with cirrhosis admitted to Yuyao People's Hospital from January 2017 to June 2018 were enrolled in this study.MRI scan, Gd-EOB-DTPA dynamic enhanced scan and hepatobiliary specific scan were performed in these patients, and their magnetic resonance images were analyzed.All patients underwent magnetic resonance examination and were given surgery or needle biopsy to detect their pathological results.According to the signal intensity of hepatobiliary specific lesions, the patients were divided into three groups: low signal, mixed signal and other signals, and the results were compared with pathological grades of postoperative specimens.Results:After 40 patients with cirrhosis received MRI and dynamic contrast-enhanced scans, 136 nodules were diagnosed as cirrhotic regenerative nodules or hyperplastic nodules.Thirty-four patients were diagnosed with small hepatocellular carcinoma, and 42 small liver cancers were found after combined with Gb-EOB-DTPA hepatobiliary specific scan, the difference was statistically significant (χ 2=8.962, P<0.05). There was statistically significant difference between the signal intensity and pathological grade of 42 cases with hepatocellular carcinoma.There were no statistically significant differences in tumor size and pathological grade. Conclusion:For patients with clinically suspected hepatocellular carcinoma, Gd-EOB-DTPA magnetic resonance imaging is helpful to early detection of cirrhotic nodules and small liver cancer with malignant tendency, and can improve the accuracy of clinical diagnosis of diseases.

Objective:To compare the clinical value of magnetic resonance imaging (MRI) and enhanced CT in the diagnosis of liver cancer.Methods:From January 2017 to December 2017, 72 patients with liver neoplasms who received treatment in Yuyao People's Hospital were selected as the subjects of this study.Enhanced CT scan and liver MRI scan were used in all patients respectively to compare the examination conditions of the two scanning methods for the lesions, the positive rate and accuracy of the detection, as well as the sensitivity and specificity of the two methods.Results:There was no statistically significant difference in the detection of extrahepatic lesions between the two methods(41.67% vs.36.11%, P>0.05). The detective rate of intrahepatic lesions of MRI (94.44%) was higher than that of enhanced CT(77.78%), the difference was statistically significant(χ 2=8.361, P<0.05). The missed diagnosis rate[5.56%(4/72)], misdiagnosis rate[1.39%(1/72)] of MRI were lower than those of enhanced CT[22.22%(16/72), 11.11%( 8/72)], and the accuracy of MRI[93.06%(67/72)] was higher than that of enhanced CT[66.67%(48/72)], the differences were statistically significant(χ 2=8.361, 4.354, 15.587, all P<0.05). The sensitivity[92.86%(52/56)], specificity[93.75%(15/16)] of MRI were higher than those of enhanced CT[71.43%(40/56), 50.00%(8/16)](χ 2=8.675, 7.575, all P<0.05). Conclusion:In the clinical diagnosis of liver cancer, the diagnostic accuracy of liver MRI is relatively high, which is conducive to the establishment and implementation of patients' treatment plan, and is conducive to clinical application and promotion.