Objective: To observe the effects of Thermafil obturat ion technique.Methods: 60 premolars with pulp pathema or periapical dese ase were divided into two groups with 30 in each at random,The teeth were treate d and the root canals were obturated by Thermafil obturation technique and later al condensation technique respectively. Preoperative and postoperative radiograp hs of each tooth were taken. Obturation time, incidence of pain during obturatio n and quality of obturation were compared.Results: Overfi lling was found in 11 cases in Thermafil group,while 3 in lateral condensation group( P 0.05).The average obturation tim e per canal of Thermafil and lateral condensation technique was 36.6 s and 247 .4 s respectuively ( P

Objective To assess the safety and efficacy of domestic sirolimus-eluting stent(SES)compared with bare metal stent(BMS)in the primary percutaneous coronary intervention(PCI)for patients with ST-segment elevation AMI in a real-world scenario.Method From January 2005 to March 2006,a total of 143 patient with ST-segment elevation AMI were enrolled in this study,and all of them underwent primary percutaneous coronary intervention(PCI).Among the 143 patients,74 were treated with domestic SESs(Firebird stent)and 69 with BMSs.The incidence of major adverse cardiovascular events(MACE:death,reinfarction,and target vessel revascularization[TVR])was evaluated at 30 days and 180 days.Continuous variables were compared using Student's unpaired t test.Categorical variables were compared using Fisher's test.Cox proportional hazard survival models were used to assess risk reduction of adverse events.P value

Objective To evaluate the impact of autoantibodies to angiotensin Ⅱ type 1 receptor AT1-AA on clinic outcomes of delayed graft function (DGF) grafts.Method We reviewed the records of all 139 consecutive adult recipients who received single kidney transplantation and clinical management between Jan.2010 and Dec.2012 in our centre.The serum levels of AT1-AA were measured by a streptavidin-enzyme-linked immunosorbent assay.All patients with DGF were enrolled in this study and divided into two groups:(1) AT+ DGF group (serum AT1-AA positive,11 cases) ;(2) AT-DGF group (serum AT1-AA negative,23 cases).All clinical and laboratory data were recorded in our transplant database system at each visit.Result 139 recipients were enrolled.The overall presence of DGF was 24.5％ (34/139).The incidence of DGF in patients with high binding AT1-AA was significantly higher than that in those with low binding of AT1-AA (11/24 vs.23/115,45.8％ vs.20.0％,P＜0.05).In addition,longer duration of renal replacement therapy (59 ± 32 vs.47 ± 26 months,P＜0.05),higher resistance index (0.80 ± 0.10 vs.0.72 ± 0.10,P＜0.05) of allografts and more severe acute tubular injury (2.7 ± 0.5 vs.1.8 ± 1.1,P＜0.05)/acute tubular necrosis (0.9 ± 0.5 vs.0.5 ± 0.3,P＜0.05) were observed in AT + DGF group than in AT-DGF group.One-year graft survival and death censored graft survival were similar between two groups (90.9％ vs.95.7％,P＞0.05).Conclusion Presence of high binding anti-AT1 receptor had detrimental impacts on initiation and development of DGF.

OBJECTIVETo analyze the data of angle variation on traction based on a finite element model of complete cervical spine with straight physiological curvature, and try to give experimental reference and suggestion in treating cervical spondylosis.

METHODSA 43-year-old female patient with straight cervical spine was chosen and the CT scan data were collected. By using specially designed modeling system, a high quality finite element model of complete cervical spine with straight physiological curvature is generated,which included ligament and muscle according to anatomy. After the model was confirmed, traction was loaded with angle 0 degree, anterior 5 degrees, 10 degrees, 15 degrees, 20 degrees, 25 degrees, to observe the data of distance change on between adjacent intervertebral foramen, processus articularis, uncovertedral joint, intervertebral discs, and stress of anulus fibrosus and nucleus pulposus.

RESULTSWhen the angle was 0 degrees-15 degrees, the distance between intervertebral foramen, Luschka joint and processus articularis posterioris was enlarged, the tensile stress was adequate and compressive stress was small. It met the clinical requests.

CONCLUSION0 degree-15 degrees anterior position is suggested for the treatment of cervical spondylosis.

Adult ; Biomechanical Phenomena ; Cervical Vertebrae ; anatomy & histology ; surgery ; Female ; Finite Element Analysis ; Humans ; Spondylosis ; surgery ; Traction ; methods

OBJECTIVETo explore the pathomorphological change of the atlanto-occipital segment of vertebral artery (V3 part) related with cervical vertigo.

METHODSFrom June 1999 to November 2011, the pathomorphological change of the atlanto-occipital segment of vertebral artery were observed in 1680 patients with cervical vertigo using 3D-CTA technology. The clinical data of these patients were analyzed. There were 783 males and 897 females, aged from 22 to 70 years old with an average of 52.8 years old. Doppler examination showed vertebral basilar artery flow velocity to speed up or slow down.

RESULTSThe blood vessel of 3360 branches were detected in 1680 patients and 2778 branches were detected out vascular anomaly. And 829 branches were in V1 segment, 421 were in V2, 328 were in V3, 1190 were in V4. The pathomorphological changes in the atlanto-occipital segment (V3) of vertebral artery included angiospasm, congenital absence, abnormal exit, localized stenosis.

CONCLUSIONThere are 4 kinds of pathomorphological changes in the atlanto-occipital segment of vertebral artery related with cervical vertigo. The 3D-CTA result can be used to judge prognosis and adopt reasonable treatment for the patients.

Adult ; Aged ; Atlanto-Occipital Joint ; Cervical Vertebrae ; Female ; Humans ; Male ; Middle Aged ; Tomography, X-Ray Computed ; Vertebral Artery ; diagnostic imaging ; pathology ; Vertigo ; pathology

Objective To assess the rotational set-up errors in patients with thoracic neoplasms. Methods 224 kilovohage cone-beam computed tomography (KVCBCT) scans from 20 thoracic tumor pa-tients were evaluated retrospectively. All these patients were involved in the research of " Evaluation of the residual set-up error for online kilovohage cone-beam CT guided thoracic tumor radiation". Rotational set-up errors, including pitch, roll and yaw, were calculated by 'aligning the KVCBCT with the planning CT, using the semi-automatic alignment method. Results The average rotational set-up errors were -0.28°±1.52°, 0.21°± 0.91° and 0.27°± 0. 78° in the left-fight, superior-inferior and anterior-posterior axis, respective-ly. The maximal rotational errors of pitch, roll and yaw were 3.5°, 2.7° and 2.2°, respectively. After cor-rection for translational set-up errors, no statistically significant changes in rotational error were observed. Conclusions The rotational set-up errors in patients with thoracic neoplasms were all small in magnitude. Rotational errors may not change after the correction for translational set-up errors alone, which should be e-valuated in a larger sample future.

BACKGROUND:Many in vivo and in vitro experiments indicate that hypoxic co-cultures promote stem cells differentiate into chondrocytes.
OBJECTIVE:To evaluate the influence of hypoxia on the chondrogenic differentiation of three-dimensional co-cultured adipose-derived stem cells and articular chondrocytes.
METHODS:Adipose-derived stem cells and articular chondrocytes were mixed at the ratio of 3:1, then the mixed cells were seeded onto poly(lactic-co-glycolic acid)-gelatin scaffold at the ultimate concentration of 5.0×1010/L. The cells were cultured in normoxia (20%O 2 ) and hypoxic (5%O 2 ) conditions for 6 weeks. After culture, hematoxylin and eosin staining was performed for histological structure analysis, and alcian blue staining was used to evaluate glycosaminoglycan synthesis. Type II col agen expression was detected by immunohistochemistry staining. The content of DNA, glycosaminoglycan and hydroxyproline in the scaffold-cellcomplex was measured.
RESULTS AND CONCLUSION:In the hypoxia group, hematoxylin-eosin staining showed the formation of massive cells and extracellular matrix;alcian blue staining showed massive glycosaminoglycan formation;immunohistochemistry staining detected strongly positive expression of col agen type II, the content of DNA, glycosaminoglycan and hydroxyproline was higher than the normoxia group. Hypoxia promotes in vitro chondrogenic differentiation of co-cultured adipose-derived stem cells and articular chondrocytes. .

[ABSTRACT]AIM:TostudytheeffectofsmallinterferingRNA(siRNA)ontheexpressionofbeta2-microglo-bulin (β2M) in pre-differentiated bone marrow mesenchymal stem cells (BMSCs).METHODS: The β2M siRNA was transfected into the pre-differentiated BMSCs with Lipofectamine 2000.BMSCs were divided into transfection group , blank control group and negative control group .The expression of β2 M at mRNA and protein levels was determined by real-time qPCR, Western blotting and laser confocal microscopy .The productions of aggrecan and type II collagen in pre-differentia-ted BMSCs were determined by toluidine blue staining and type Ⅱcollagen immunofluorescence .RESULTS:The results of real-time qPCR, Western blotting and laser confocal microscopy showed that siRNA successfully inhibited the expression ofβ2 M at mRNA and protein levels in the pre-differentiated BMSCs .The results of toluidine blue and type Ⅱcollagen im-munofluorescence staining showed that siRNA does not affect the productions of aggrecan and type Ⅱ collagen in the pre-differentiated BMSCs .CONCLUSION:siRNA targeting β2 M reduces the expression of β2 M in the pre-differentiated BM-SCs and does not affect the chondrocyte characteristics of pre -differentiated BMSCs .

[ABSTRACT]AIM:Toinvestigatetheinhibitoryeffectsofresveratrolonchondrosarcomaandtherelationwith mitochondrial and PI3K/Akt pathways.METHODS:Chondrosarcoma SW1353 cells were treated with resveratrol at con-centrations of 25, 50 and 100 μmol/L for the time intervals of 24 h, 48 h and 72 h.The viability and apoptosis of the SW1353 cells in the presence or absence of resveratrol were analyzed by CCK 8 assay and Hoechst 33258 staining , respec-tively.The protein levels of Bcl-2, Bax, activated caspase-3, Akt and p-Akt were detected by Western blotting .The cell migration ability was determined by wound scratch assay .RESULTS:Exposure of the cells to resveratrol resulted in a de-crease in the cell viability in a dose-and time-dependent manner (P<0.05).visible nuclei with apoptotic characteristics in resveratrol group were observed .The protein levels of activated caspase-3 and Bax were increased , and Bcl-2 and p-Akt were decreased compared with control group .The total Akt were not significantly changed .Resveratrol also significantly re-duced the migration of tumor cells .CONCLUSION:Resveratrol induces apoptosis of chondrosarcoma , which plays a role of part through mitochondrial and PI 3K/Akt signaling pathways .

AIM To observe the clinical effects and safety of Zibei Zhike Granules (Asteris Radix et Rhizoma,Ardisiae japonicae Herba,Fritiliariae cirrhosae Bulbus,etc.) for acute broncho-bronchitis with remained toxicity lingering lung.METHODS A multi-center,randomized,double-blinded,double-simulation and positive drug parallel controlled trial was adopted.Two hundred and forty cases of patients with the 1 ∶ 1 ratio were assigned to treatment and control group.The treatment group were treated with Zibei Zhike Granules and the control group were treated with Zikebao Tablets (Asteris Radix et Rhizoma,Citri rubrum exocarpium,Platycodi Radix,etc.).The treatment course lasted five days.RESULTS The total effective rate of acute broncho-bronchitis in the treatment group was 73.04％,and 54.78％ in the control group.There was statistical significance between the total effective rate of the two groups (P ＜ 0.01).The total effective rate of traditional Chinese medicine syndrome in the treatment group was 73.91％ and 60.86％ in the control group,and there was statistical significance between the total effective rate of the two groups (P ＜ 0.05).The treatment group showed better clinical effects in improving individual symptoms of cough and spitting sputum.CONCLUSION Zibei Zhike Granules has good clinical effects on acute broncho-bronchitis.