Objective: To reconstruct three dimension (3D) model of a rtificial tooth and to establish standardized 3D artificial teeth graphic datab ase. Methods: Artificial teeth were incised with CGI autom atic cross section scanning instrument, then data points were picked up from e ach parallel layer contour of incised tooth, and 3D stereo models of artificia l tooth were retrieved using 3D reconstruction techniques. Results: 3D graphic models of 28 artificial teeth were established.The models may represent the graphic feature of the teeth. Conclusion: The present technic is feasible in the establishment of 3D graphic models of artificial tooth.

Objective:To investigate the feasibility of 3-D computer aided design(CAD)for the framework of a mandibular Kennedy Class Ⅱ,Modification 2 arch.Methods:In terms of the principle of clinical design,the 3-D framework was built with the technique of mixed model of points cloud,curves and surfaces on the reconstructed model of a partially edentulous cast,including the tissue surfaces and polishing surfaces of every component,such as clasp,rest,lingual bar and mesh construction,etc.Results:Preliminarily,a CAD method for 3-D RPD framework design was established and a individualized RPD framework 3D geometric model was set up.Conclusion:CAD for RPD framework design based on the mixed model of points cloud,curves and surfaces is feasible.

Objective To investigate and analyze the efficacy of intravenous levosimendan in the treatment of acute cardiac failure after cardiac surgery. Methods The study of the 80 cases of acute heart failure in patients undergoing cardiac surgery after treatment in March 2014 to March 2017, the patients were monitored in the treatment before and after treatment of 24 h heart rate, left ventricular ejection fraction, mean arterial pressure and central venous pressure and other related indicators. Results Of all patients, 58 survived after treatment, and 22 died during or after treatment. Compared with before treatment, after treatment of 24 h in left ventricular ejection fraction in patients, mean arterial pressure, central venous and changes in heart rate were significantly improved, data between the two groups had significant difference compared with statistical significance(P<0.05). In 8 patients, transient blood pressure reduction occurred during treatment, but symptoms disappeared after taking appropriate measures, and other patients had no more severe adverse reactions. Conclusion According to the method of intravenous levosimendan in treatment of acute heart failure in patients undergoing cardiac surgery after treatment can make the patient's cardiac function improved, has a significant effect on the prognosis of patients, should have a relatively high value.

Objective To analyze the correlation of carotid artery stenosis(CAS)with postoperative cognitive dysfunc?tion(POCD)in patients who underwent off-pump coronary artery bypass grafting(OPCABG). Methods Between March 2014 and October 2014, a total of 157 patients who underwent OPCABG in our hospital were enrolled and divided into POCD group and non-POCD group according to their performance respondent to MMSE questionnaire survey conducted 5 days before operation. LOTCA questionnaire survey was conducted at the first day and 7th days pre-and post-operation re?spectively in order to investigate the influence of CAS on POCD in patients. Results The incidence of POCD was 30.6%(48 out of 157). Advanced age, diabetes,cultural level,carotid artery stenosis, Hb level after operation, score of LOTCA question?naire survey conducted before surgery,time of respirator and the time spend in ICU were significant predictive factors for POCD. However, multivariate logistic regression analysis showed that age, CAS and the time spend in ICU were independent risk factors for POCD, especially CAS(OR=5.078,95%CI:2.211-11.662, P<0.001). Patients with severe CAS suffer from a significant decline in cognitive function on space, time, action and ideation. Conclusion CAS is a predominant risk factor for POCD in patients undergoing OPCABG.

ObjectiveIn order to study the effect of three-month rehabilitation on motor function in hemiplegics after stroke. Methods125 patients were randomly divided into two groups, rehabilitation group (72 cases)and control group(53 cases).Patients in the rehabilitation group were given clinical treatment,electric stimulation therapy(EST) and regularly physical therapy, while those in control group were given clinical treatment and unguided self-training, and the evaluation was done in pre-treatment and post-three-month respectively. Motor function was assessed in Fugl-Meyer Assessment(FMA).ResultsMotor scores in each group had a more significant difference(P<0.001)before and after treatment, the process of scores in the rehabilitation group was obviously superior to that in the control group(P<0.001). Conclusions Rehabilitation training on hemiplegics after stroke may obviously improve motor function, depressing the disability and increasing the living quality.

Objective To investigate the expression of gene Fmr1 in rats cortex, hippocampus and hypothalamus areas after the rapid eyes movement ( REM ) sleep deprivation .Methods Using the modified multiple platform method (MMPM), 126 rats were randomly and averagely divided into three groups , the normal control group ( CC), the environmental control group (TC) and the sleep deprivation group (SD).Each group was detected on day 1, day 2, day 3, day 5, day 7, and day 9, and the sample tissues were extracted from 7 rats at each time point.Immunohistochemistry and RT-PCR were operated to analysis the expression of gene Fmr 1.Results The expressions of gene Fmr1 were increased gradually in the cortex and thalamus of the SD group after 3 days ( P <0.05 ) , and the expressions in the CC and TC groups had no significant difference (P >0.05).The expressions of gene Fmr1 were decreased gradually in hippocampus for SD after 3 days ( P <0.05 ) , and that in the CC and TC groups had no significant difference ( P >0.05 ) . Conclusion The expressions of gene Fmr 1 were increased gradually in the cortex and thalamus but decreased in the hippocampus in the SD group after 3 days.

Objective To investigate the pathological changes and mechanism in the urethra by parturition-induced stress urinary incontinence.Methods Sprague Dawley female rats underwent vaginal balloon dilation for 4 hours immediately after delivery.One week later,the rats were anesthetized and both ovaries were excised.Then a rat model of stress urinary incontinence (SUI) was successfully established.One month after ovariectomy,conscious cystometry and Leak-Point Pressure (LPP) were measured by MP150.Histological examination and Western blotting were performed after functional assays.Results (1) 85％ of rats presented astress urinary incontinence in the model group.(2) The urethras in SUI rats had decreased muscles,and striated muscles showed fragmentized and disorganized.(3) Elastic fibers were long,well organized and tightly connected to the muscle bundles in sham group,while elastic fibers showed fragmentation and disorganization in the model group.(4) The protein expression of vascular endothelial growth factor (VEGF) and blood vessels were reduced in SUI rats as compared with the sham rats.Conclusions Muscle and elastic fibers in the urethra are disrupted in SUI rat.VEGF may play an important role in regulation of pathological changes in urethra.

Objective To study on imagination features of tumor thrombi in the portal vein of primary liver cancer (PLC). Methods We established a new type system of tumor thrombi, with Ⅰ 0 to Ⅳ, a total of 5 types and 8 sub-types in the portal vein of PLC based on normal intrahepatic portal vein anatomy and growing features of the tumor thrombi. The relationship between the types and the imaging diagnosis of 130 PLC cases with tumor thrombi in the portal vein was studied. Results 85%(110/130) cases of PLC with tumor thrombi in the portal vein belongs to type Ⅱ or Ⅲ when being first diagnosed in the hospital. The resectability rates for type Ⅰ, Ⅱ, Ⅲ, Ⅳ were 62%(5/8), 16%(10/62), 10%(5/48), 0 (0/12), respectively, and chemoembolization therapy (TACE) was given in 38%(3/8), 40%(25/62), 27%(13/48), 16%(2/12), respectively. Conclusions The new types of tumor thrombi are helpful for diagnosis and treatment of PLC with tumor thrombi in the portal vein.

ObjectiveInvestigate the value and feasibility of image registration with reverse rotation in lateral cerebral DSA.Methods ( 1 ) Experimental study:the target images were subtracted directly,and subtracted again after reverse rotation.Software of registration and subtraction with reverse rotation edited by the author utilizing Visual Basic.The function of the automatic angle detection by the software were evaluated to see whether it detected the angle of line.The subtraction function of DSA by the software was evaluated.(2) Clinical retrospective study:the untreated mask and target inages of 15 patients with motion along vertical axis during lateral cerebral DSA were uploaded to the software.The target images were processed with and without the software to get two sets of images.( 3 ) Evaluation:four experienced radiologists read and compared the two sets of the images,and graded their findings.Results ( 1 ) The automatic detection by the software suggested that the target images should be rotated counterclockwise 1.3°. The subtraction result of the software was satisfactory.(2)In the 15 sets of images,there were only three sets of images deemed optimal after traditional subtraction.After reverse rotation,artifacts were significantly reduced and the image sharper. There were ten cases with significant artifacts after traditional subtraction,and those images were sharper and showed more peripheral vessels after reverse rotation. The traditional subtraction images of two sets could not be interpreted,the reverse rotation registration images reached the diagnostic quality.(3)Subjective evaluation: there were more information and less noise and distortion in the registration images with reverse rotation than in the traditional subtraction. But the image resolution decreased slightly after reverse rotation registration.ConclusionThe registration of digital angiography with reverse rotation can improve the image quality in lateral cerebral DSA.

Objective To investigate the phenotype and function of CD8+T cells cultured with SK-OV-3. Methods Transwell coculture experiments were conducted in 24-well plates with inner wells to separate CD8+ T cells and SK-OV-3. After 5 days of culture, CD8+ T cells were washed, and 1 × 106 cells were collected for Foxp3, CD25, CD28, CTLA-4 and GITR mRNA analysis and 2 × 106 cells were collected to detect expression of Foxp3, CD25, CD28, CTLA-4 and GITR in CD8+ T cells by flow cytometry. CD8+T cells that cultured alone or with SK-OV-3 were added at ratios of 1∶0 , 1∶1 , 1∶5 , 1∶10 , and 0∶1 to na?ve CD4+ T cells in 96-well plates. All wells were cultured with the presence of irradiated PBMCs and anti-CD3 antibody. After 72 h, [3H]-thymidine was added for 16 h prior to the determination of proliferation by scintillation counting. Results Compared with CD8+ T cells cultured without SK-OV-3 , the expression of Foxp3 and CTLA-4 was increased and CD28 expression was decreased in CD8+ T cells cultured with SK-OV-3 (both P < 0.001). We found that CD8+T cells cultured with SK-OV-3 significantly suppressed the na?ve CD4+ T cell proliferation induced by the anti-CD3 stimulation in a dose-dependent manner. In contrast, CD8+ T cells cultured without SK-OV-3 did not suppress na?ve CD4+ T cell proliferation. Conclusion Ovarian cancer cell can induce the suppressive CD8+Treg, which is an important link of the immunosuppressive microenvironment in ovarian cancer.