Objective To assess the stresses of fiber posts combined with auxiliary posts in anterior teeth with flared canals by three dimensional finite element method .Methods Nine 3D models of maxillary first incisors with flared canals restored by two post systems(porcelain pile ,fiber and auxiliary pile) divided into 5 groups were generated .By static loading method ,dental crowns cut 1/3 and middle 1/3 connection link five points into 135 angles by 100 N force loading .The major stress for the dentin and the e‐quivalent Von Mises stress for resin cement and post and core were calculated .Results Biggest tooth stress value of 111 .9 Mpa and the largest resin adhesive stress value 54 .6 Mpa had appeared in the use of a model of the quartz fiber post after repair ,ceramics pile repair model of pile nuclear stress value and the maximum was 48 .1 Mpa .Combining with one auxiliary post ,stress values re‐duced significantly in dentin ,in cement and in post and core .However ,as more auxiliary posts were added ,the stresses did not de‐crease sequentially .Conclusion It is suggested that to restore the tooth with flared canals by quartz fiber post combining with one auxiliary post .

Objective:To investigate the alteration of delayed memory and its relationship with neurogenesis and angiogenesis in vascular dementia (VD) rats after moxibustion therapy. Methods: Two hundred adult male SPF Wistar rats were chosen for the experiment. Thirty-six rats were randomly selected as the sham operation group. Except for rats in the sham operation group (n=36), the others were made into VD models by bilateral common carotid arteries occlusion (BCCAo). After modeling, the 108 survived rats were randomly divided into 3 groups: a model group, a neural stem cells (NSCs) plus endothelial progenitor cells (EPCs) moxibustion group and a NSCs moxibustion group. Co-transplanted implant was transplanted into the rats in the NSCs plus EPCs moxibustion group, and the rats in the NSCs moxibustion group were transplanted by NSCs only. The NSCs plus EPCs moxibustion group and the NSCs moxibustion group received suspended moxibustion therapy at Baihui (GV 20), Dazhui (GV 14) and Shenting (GV 24), (each group was divided into 3 subgroups by the treatment course as 1, 2 and 3 courses). Every group was measured by Morris water maze to evaluate its delayed memory after 3 treatment courses and the rat’s brain was taken out after perfusion of 4% paraformaldehyde one day after 1, 2 and 3 treatment courses, respectively. Marker protein expression was detected by laser confocal microscope to analyze the effect on neurogenesis and angiogenesis. Results: VD rats showed delayed memory in Morris water maze test 3 d after ischemic injury. After 3 courses of moxibustion therapy, VD-induced delayed memory deficits were improved in the NSCs plus EPCs moxibustion group and the NSCs moxibustion group. The expressions of nestin, doublecortin (DCX) and CD34 increased significantly in the two moxibusiton groups after every treatment course (all P＜0.05), which might contribute to the neurogenesis and angiogenesis in hippocampus. In addition, compared with the rats in the NSCs moxibustion group, the expressions of nestin, DCX and CD34 increased significantly in the NSCs plus EPCs moxibustion group (P＜0.05). Conclusion: Moxibustion can reverse VD-induced delayed memory deficits, which may be related to the promotion of neurogenesis and angiogenesis.

UNLABELLEDobjective: To investigate effects of buyang huanwu decoction (BYHWD) on the rats' myocardial hypertrophic model induced by abdominal aortic constriction, and to clarify the molecular regulatory mechanisms for sarcoplasmic reticulum calcium uptake.

METHODSHypertrophic myocardium rat model was induced by abdominal aorta constriction (AAC). Four weeks after modeling, rats were randomly divided into the sham-operation group (Group S), the AAC model group (Group M), the Enalapril group (Group E), and the BYHWD treatment group (Group BYHWD), respectively. The left ventricular systolic pressure (LVSP), left ventricular end-diastolic pressure (LVEDP), + dp/dtmax,-dp/dtmax, cardiac output (CO), heart mass index (HMI), and left ventricular mass index (LVMI) were observed in each group after 12-week medication. The serum contents of the atrial natriuretic peptide (ANP) and brain natriuretic peptide (BNP) were detected using ELISA. The SERCA2a activity, the ex- pressions of SERCA2a, phospholamban (PLN), and PLN phosphorylation were observed finally.

RESULTSCompared with Group S, LVSP and LVEDP significantly increased,-dp/dtmax and CO obviously decreased, the myocardial tissue was obviously thickened, the serum contents of ANP and BNP increased, the activity and expression of SERCA2a decreased, the SERCA2a/PLN ratio and PLN phosphorylation degree decreased in Group M (all P <0.05). Compared with Group M, LVEDP obviously decreased, -dp/dtmax and CO obviously increased, the hypertrophy myocardial tissue was obviously lessened, the serum contents of ANP and BNP decreased, the activity of SERCA2a increased, the relative expression contents of SERCA2a, Ser16, and Thrl7 were elevated in Group BYHWD (all P <0.05). BYHWD had significant roles in elevating the SERCA2a/PLN ratio and PLN phosphorylation degree (P <0.05).

CONCLUSIONBYHWD could significantly improve hemodynamics of heart failure rats, elevate CO, lessen cardiac hypertrophy, and improve the capabilities for sarcoplasmic reticulum calcium uptake.

Animals ; Aortic Aneurysm, Abdominal ; metabolism ; pathology ; Calcium ; metabolism ; Constriction, Pathologic ; metabolism ; Drugs, Chinese Herbal ; pharmacology ; Hypertrophy, Left Ventricular ; metabolism ; pathology ; Male ; Myocardium ; pathology ; Rats ; Rats, Wistar ; Sarcoplasmic Reticulum ; metabolism

OBJECTIVETo evaluate the feasibility and safety of patient controlled analgesia (PCA) technology during double balloon endoscopy(DBE) inspection.

METHODSAccording to the anesthesia, 120 patients with suspected intestinal disease were randomized into non-anaesthesia(Group A), propofol infusion with TCI vein pump(Group B), and remifentanil vein infusion with PCA pump(Group C), with 40 patients in each group. The feasibility and safety of the three methods in double balloon endoscopy(DBE) inspection were evaluated.

RESULTSThe tolerance in groups B and C was good and the procedure success rate was 100%, significantly higher than Group A(80%, 12/40, P<0.01). The fluctuation of blood pressure, heart rate, and oxygen saturation was significantly greater in groups A and B, while patients in Group C remained stable. The detection rate was 67.5%(27/40) in Group B and 72.5%(29/40) in Group C, significantly higher than that in Group A(37.5%, 15/40, all P<0.01). The depth of endoscope was longer and the length of hospital stay shorter in Group C as compared to Group B(both P<0.05).

CONCLUSIONThe application of PCA technology in the double-balloon endoscopy inspection can meet the individualized analgesic needs of patients in different period, increase the tolerance and compliance of patients to the inspection, facilitate patient-operator communication and positions change, reduce the operation risk, and increase the success rate of double balloon endoscopy.

Adolescent ; Adult ; Aged ; Analgesia, Patient-Controlled ; Analgesics ; therapeutic use ; Endoscopy ; Female ; Humans ; Male ; Middle Aged ; Piperidines ; therapeutic use ; Propofol ; therapeutic use ; Prospective Studies ; Young Adult

Airway Resistance ; Animals ; Bronchial Hyperreactivity ; etiology ; Histamine ; pharmacology ; Lung ; pathology ; virology ; Microscopy, Immunoelectron ; Neurofilament Proteins ; analysis ; Neuronal Plasticity ; Rats ; Rats, Sprague-Dawley ; Respiratory Syncytial Virus Infections ; physiopathology ; Respiratory Syncytial Virus, Human ; isolation & purification

OBJECTIVE: To assess the labial and lingual alveolar bone thickness in adults with maxillary central incisors of different inclination by cone-beam computed tomography (CBCT). METHODS: Ninety maxillary central incisors from 45 patients were divided into three groups based on the maxillary central incisors to palatal plane angle; lingual-inclined, normal, and labial-inclined. Reformatted CBCT images were used to measure the labial and lingual alveolar bone thickness (ABT) at intervals corresponding to every 1/10 of the root length. The sum of labial ABT and lingual ABT at the level of the root apex was used to calculate the total ABT (TABT). The number of teeth exhibiting alveolar fenestration and dehiscence in each group was also tallied. One-way analysis of variance and Tukey's honestly significant difference test were applied for statistical analysis. RESULTS: The labial ABT and TABT values at the root apex in the lingual-inclined group were significantly lower than in the other groups (p < 0.05). Lingual and labial ABT values were very low at the cervical level in the lingual-inclined and normal groups. There was a higher prevalence of alveolar fenestration in the lingual-inclined group. CONCLUSIONS: Lingual-inclined maxillary central incisors have less bone support at the level of the root apex and a greater frequency of alveolar bone defects than normal maxillary central incisors. The bone plate at the marginal level is also very thin.
Adult ; Bone Plates ; Cone-Beam Computed Tomography* ; Humans ; Incisor* ; Prevalence ; Tooth

OBJECTIVE: To investigate the feasibility of applying multiple displacement amplification (MDA) to DNA typing in forensic pathological section. METHODS: Ninety-eight pieces of pathological sections were prepared in terms of 3 factors as the period of preservation, tissue types and death ages, and randomized into groups by Latin square by double 7-order design. Silicon bead method was used to extract the DNA template. Compared with the PCR amplification performed directly by AmpFlSTR Identifiler kit in the control group, MDA was performed before amplification in the experimental group. Based on the samples from fresh autopsies as the standard genotypes, the number of detection and the detection rate were analyzed and compared between the experimental group and the control group. RESULTS: Between the control group and the experimental group, there was significantly statistical difference regarding the rate of DNA typing in each period of the tissue sections preserved (P<0.01). The detection rate of the 16 loci in the experimental group was more than 95% when the period of the tissue sections were preserved within 360d. There was significant difference in different tissue types (P<0.01). But there was no significant difference in different death ages (P>0.01). CONCLUSION MDA is efficacious in DNA typing of forensic pathological sections, for it can improve the DNA template quantification through abating the inhibiting factor's concentration of PCR and reducing the rate of allele drop out (ADO). However, the period of the sections preserved and tissue types would affect the results of genotyping by MDA.
Adolescent ; Adult ; Age Factors ; Brain Chemistry ; Cadaver ; Child ; Child, Preschool ; DNA/genetics* ; DNA Fingerprinting/methods* ; Feasibility Studies ; Forensic Pathology/methods* ; Frozen Sections ; Genetic Loci ; Genotype ; Humans ; Infant ; Kidney ; Liver ; Loss of Heterozygosity/genetics* ; Middle Aged ; Nucleic Acid Amplification Techniques/methods* ; Polymerase Chain Reaction/methods* ; Preservation, Biological/methods* ; Time Factors ; Young Adult

Objective To investigate the distribution and projective feature of cat olivocochlear neurons. Methods Eleven adult cats were divided into two groups randomly. The experimental group of eight cats was injected of I% cholera toxin B (CTB) to the left cochlea, while injected of 5% fluoro gold (FG) to the right cochlea. The control group of three cats was injected of saline to bilateral cochlea. After a survival time of 7 days, serial frozen sections were cut in the cat brainstem. All the sections were processed by immunofluoreseent procedure for CTB and FG, and the labeled olivocochlear neurons were observed byfluorescent microscope. Results In the experimental group, the mean total of olivocochlear neurons labeled by CTB and FG was 3210 ± 168, including lateral olivocochlear neurons (LOC, 2298 ± 120) and medial olivocochlear neurons (MOC,913 ± 64). The labeled neurons were divided into three different types according to their feature of projection: neurons which only projected to the ipsilateral cochlea, neurons which only projected to the contralateral cochlea, and double-labeled neurons which projected both to the ipsilateral and contralateral cochlea, but the double-labeled neurons comprised 3.9% and 15. 1% in the LOC and MOC system respectively. No labeled neurons were found in the control group. Conclusions There are three types of neurons in the cat olivocochlear system. The neurons which projected to the bilateral cochlea may distribute both in the LOC and MOC system.

Objective To detect TOP2A protein expression and gene copy number alterations, and to analyze related clinical and pathological implications in pediatric neuroblastic tumors ( NT ).Methods Immunohistochemistry was used to detect TOP2A protein expression.Fluorescence in situ hybridization (FISH) was used to detect numerical aberrations of TOP2A.Results TOP2A protein was expressed in 59.1%(52/88) of cases, which was associated with differentiation (P=0.006), Ki-67 index (P<0.01) and MKI (P=0.001).Twenty-eight cases (35.0%, 28/88) showed TOP2A gene amplification, which was correlated with the age (P<0.01), clinical stage (P=0.028), high risk group (P=0.001), Ki-67 index (P=0.040) and differentiation (P=0.014).Survival analysis showed that TOP2A expression was related to survival rate.Multivariate analyses showed that TOP2A expression was an independent predictor for poor prognosis (P=0.010).Conclusions More than half of the cases show TOP2A expression, which is more likely associated with NB, high Ki-67 index and high MKI.Cases with TOP2A expression have shorter survivals and poorer prognosis.TOP2A amplification is seen in 35% and likely occurs in patients older than 18 months and at advanced INSS stages (Ⅲ and Ⅳ).As a target of the anthracycline-based adjuvant drugs, TOP2A test can be used to select patient with NT for the therapy.

Objective To study the positive pressure intravenous catheter in HIV patients' infusion.Methods 4000 HIV out-patients from Feb 2010 to Mar 2012 were studied and divided into experimental group and control group depending on patients' intention for positive pressure venous catheter.2000 cases in the experimental group were applied with positive-pressure intravenous catheter infusion.Traditional needle was used for the infusion in 2000 cases of the control group.Fluid fluency,skin lesions,phlebitis,needle injuries,and incidence of occupational exposure of the patients were observed by the responsible nurses.Results In the experimental group,1 870 cases(93.5％ ) of infusion were fluent; 180 cases (9.0％) had red and swollen at the puncture site; 189 cases (9.5％) had vascular damage.No phlebitis,needle injuries and occupational exposure were observed.On the contrary,fluency,red and swollen at puncture site and vascular damage were found 1 729 (86.5％),250( 12.5％ ) and 235 ( 11.8％ ) cases respectively in the control group.4 cases of needle injuries and occupational exposure were found in the control group.The difference between two groups was statistically significant ( x2 =55.103,12.768,5.582,4.004,4.004,respectively; P ＜ 0.01 or P ＜ 0.05 ).Conclusions Positive-pressure intravenous catheter provides a safe and effective infusion for AIDS patients.It avoids the pain caused by repeated puncture to patients,effectively protects blood vessels,reduces the risk of needle injuries and occupational exposure due to repeated puncture.The positive pressure intravenous catheter plays an important role in promoting the treatment of AIDS natients.