Objective: To compare the apical sealing effects of two root canal fillers, GuttaFlow and AH Plus, for clinical reference. Methods: The Cochrane system evaluation method was used to search the Cochrane Library, Embase, CBM, PubMed, CNKI, Weipu, and Wanfang databases. Additionally, relevant journals and conference papers were manually retrieved, and relevant randomized controlled trials were collected. Two reviewers independently evaluated the quality of each study and extracted the data. A meta-analysis was performed using the RevMan5.3 software for homogenous studies, and a descriptive analysis was performed for studies with poor homogeneity. Results: In total, 10 randomized controlled trials containing 398 isolated teeth were included. The meta-analysis results showed that the difference in apical microleakage was statistically significant at 1 week and 3 months [1 week: MD=-0.13, 95% CI (-0.22,-0.04), P=0.007; 3 months: MD=-1.27, 95% CI (-1.94,-0.60), P=0.000 2] but not at 6 months [MD=-0.10, 95% CI (-0.26, 0.06), P=0.23]. Conclusion Based on existing research results, GuttaFlow may achieve better results than AH Plus in the short term (≤ 1 week). Because it is subject to limitations of time, quality, and research methods, this conclusion requires more long-term, high-quality, large-sample, multimeasurement randomized controlled trials for further validation.

Objective To investigate the therapeutic effect of post-traumatic complex posterior urethral stricture in the male patients.Methods Clinical data of 479 male patients with post-traumatic complex posterior urethral stricture were reviewed.One-stage resection of the stenosis and end-to-end anastomosis was performed in 422 patients and scrotal flap with blood pedicle posterior urethroplasty in 57.Results The mean operation time was 115 minutes(range,90-140 minutes).The mean blood loss was 225 ml(range,100-300 ml).No intraoperative blood transfusion was needed.The mean follow-up time was 15 months(range,12-24 months).Among the 422 patients performed end-to-end anastomosis,386 patients had good voiding and 36 had dysuria because of the formation of anastomotic stoma valve(21 patients)or stricture ring(15 patients).The problem was resolved by transurethral valve/stricture ring resection.Among 57 patients undergone posterior urethroplasty,45 patients had good voiding nine patients were found with anterior urethra-skin tube anastomotic stoma stricture,of which four patients were treated by urethral dilatation and five by endourethrotomy; three patients were found with posterior urethra-skin tube anastomotic stoma stricture,of which one patient was treated by urethral dilation and two by endourethrotomy.Conclusions One-stage resection of the stenosis and end-to-end anastomosis is the main treatment for post-traumatic complex posterior urethral stricture.If the condition of the patients does not allow the end-to-end anastomosis,posterior urethroplasty can be an alternative.

Objective To investigate the effects of HO-1 on renal allografts after HO-1 gene transfection in rat chronic allograft nephropathy model. Methods Twenty F344 and twenty-six Lewis rats were included in this experiment. They were divided into 3 groups at random. Six Lewis rats were in pseudo-operation group, 10 Lewis were in empty carrier group (transfected with adenovirus) and 10 Lewis were in the gene transfection group (transfected with Ad-HO-1 adenovirus). The expression of HO-1 protein was detected by WB at the 1st ,2nd,3rd and 4th week. The content of creatinine in blood was assayed at the 4th,8th, 12th and the 16th week. The weight of rat, the value of patholiogical changes and the expression of ?-SMA,TGF-?1 and PDGF-B were analysized at the 16th week. Results The weight of rats in 3 groups had not any changes at 16th week. The content of creatinine in blood of gene transfection group were lower than those in the empty carrier group. The expression of HO-1 protein were very high in the 1st and 2nd week and decreased at 3rd and 4th week. The Banff value of kidney in the gene transfer group was better than that of the empty carrier group at the 16th week. The level of ?-SMA, TGF-?1 and PDGF-B in the gene transfection group were significantly lower than those in the empty carrier group. Conclusions Ad-HO-1 could efficiently transfer HO-1 gene into rat donor kidney. The prevention of chronic allograft nephropathy may have relationship with the decreasing expression of ?-SMA, TGF-?and PDGF-B.

We have constructed the immune microsphere against tumor necrosis factor-alpha (TNF-alpha) prospectively, hoping to establish the experiment groundwork in more researches which could be used in specific elimination of the TNF-alpha by blood purification method for the future. The recombinant human tumor necrosis factor-alpha monoclonal antibody (rHTNF-alpha McAb) was wrapped on the polystyrene microsphere (PSM) carrier connecting poly-L-lysine (PLL) beforehand. They were earmarked by the fluorescein isothiocyanate (FITC) respectively. The packing conditions were examined using the inversted and fluorescence microscopes and the spectrophotometer. The results showed that the best conditions for wrapping were 20 degrees C, pH9.5 and 60 minutes. The PLL content was not changed in the washing fluid after coating, which indicated the wrapping was quite firm. At the same temperature and same coating time, the rHTNF-alpha McAb coated on the PLL was obviously substantial when the concentration of glutaraldehyde solution was 0.2%. The findings demonstrated that the built immune microsphers can be used as a novel adsorption material. This method is simple and economic, and it offers a new approach to the related studies.
Antibodies, Monoclonal ; immunology ; Fluorescein ; chemistry ; Humans ; Microspheres ; Polylysine ; chemistry ; Polystyrenes ; chemistry ; Recombinant Proteins ; immunology ; Tumor Necrosis Factor-alpha ; immunology

ObjectiveTo identify the relationship between urodynamic parameters and vaginal deliveries in women with genuine stress urinary incontinence(GSI).Methods56 women with vaginal delivery history who were diagnosed as stress urinary incontinence underwent urodynamic tests.Their abdominal leak point pressures(ALPP),maximum urethral closure pressure(MUCP) and functional urethral length(FUL) were recorded,and their Correlation to vaginal deliveries was tested using linear correlation coefficient.ResultsCorrelation between vaginal deliveries and ALPP showed a significant relationship(r=-0.349,P<0.05).Neither MUCP nor FUL showed a close relationship with vaginal deliveries(r=-0.219 and r=-0.178 respectively,P>0.05).ConclusionVaginal delivery plays an important role in the pathogenesis of GSI.The more vaginal deliveries,the more serious GSI.

Objective To promote the cure rate of operation and to decrease the operative complications in patients with upper urinary tract stone Methods The data of 962 patients with upper urinary tract stone operatively treated in our department from 1975 to 2002 were reviewed and analyzed Results Residual stones were found in 109 out of 673 patients (11 3 %) Of the 109 cases, conservative treatment, nephrectomy and various methods of treatment were performed in 21, 12 and 76 cases, respectively Conclusion Strict control of operative complication, proper selection of the operation type and reasonable management of the complication are the important measures to improve the cure rate of upper urinary tract stone, to greatly decrease the occurrence of residual stones and to reduce the possibility of nephrectomy

Objective To explore the effects of aging on NO cGMP pathway and sexual hormone in penile tissue of different age rats. Methods The nitric oxide(NO) and cyclic guanosine monophosphate(cGMP) contents, nitric oxide synthase(NOS) activity in penile tissue and testosterone(T) and luteinizing hormone(LH) contents in blood of rats of different ages(2, 8, 16 and 24 months) were detected. Results With age increasing, ① The NO content of penile tissue firstly rose(8 months, the highest ) then dropped (24 months, the lowest), being the same as the variation of NOS( P

Objective To investigate the changes of androgen receptor (AR) and AR mRNA of the ventral lobe, lateral lobe part 1(LP1) and lateral lobe part 2 (LP2) in the Wistar rat prostate after androgen manipulation. Methods Healthy adult male Wistar rats were randomly divided into 3 groups: control group(N), castration group(C) and androgen replacement group (T). In castration group, orchiectomy was performed through the scrotum. In androgen replacement group, testosterone propionate (2 5 mg/d) was injected subcutaneously for 14 d after castration. Expressions of AR and AR mRNA in the separate lobes of the adult Wistar rat prostate after androgen ablation and replacement were determined by immunohistochemistry and semi quantitative PCR. Results Different autoregulation of AR protein and mRNA was observed in the ventral lobe, LP1 and LP2 of rat prostate after androgen manipulation. In the ventral lobe and LP1, immunoreactive nuclear AR markedly decreased in staining intensity in the glandular epithelium 2 d after castration compared to that in the intact rats. Epithelial immunostaining continued to decline and was absent at day 7 and returned to normal level 3 d after testosterone replacement. There was a transient increase in AR mRNA demonstrated by RT PCR within 3 d and returned to control level within 7 d after castration in the ventral lobe and LP1 of rat prostate. In contrast, in LP2, the epithelial cells showed continued expressions of both AR protein and mRNA 14 d following androgen withdrawal. Conclusion These results suggest that there might be a different regulation of AR mediated by androgen in ventral lobe, LP1 and LP2 of rat prostate.

Objective To explore the mechanism of the referred pains in pelvic pain due to chronic prostatitis and the relation between pain due to prostatitis and pelvic floor muscle dysfunction. Methods The retrograde fluorescent double labeling and immunohistochemistry were used. A total of 24 Wistar rats were divided two groups, 12 in each group. In the first group, Propidium Iodide(PI) was injected into the prostate, Bisbenzimide(Bb)into the external anal sphincter. In the second group, PI was injected into the prostate, Bb into genitofemoral, iliohypogastric, ilioinguinal, femoral and lateral femoral cutaneous nerves. Results The fluorescent double labeled cells were found in the L 1 L 2 and L 6～S 3 dorsal root ganglia(DRG) and some of them were confirmed to contain calcitonin gene related peptide(CGRP) and P substance (SP) by immunohistochemistry. Conclusion The findings confirm that the peripheral process of DRG cells dichotomizes into prostate, external anal sphincter and somatic parties, and some of these cells contain CGRP and SP, which indicates the referred pains in pelvic floor may be caused by axon reflex in the peripheral process of DRG cells. Meanwhile, neurogenic inflammation might play an important role in this persistent pain status. Pain due to prostatitis is correlated with pelvic floor muscle dysfunction.

Objective To study the modulation alterations of calcium activated potassium channel (Kca) and calcium activated chloride channels (Clca) on detrusor instability(DI) and their roles in DI. Methods The detrusor instability (DI) animal model was established using female Wistar rats. Detrusor strips were obtained from normal and DI rats. The contraction frequency and amplitude of the strips were measured by an in vitro tension test. The actions of channel openers and blockers were studied. Results Spontaneous contraction frequency and amplitude of DI increased significantly. The block of big conductance calcium activated potassium channel(Bkca) by Iberiotoxin resulted in decrease of frequency but increase of amplitude in the control, but only increase of frequency in DI. The opener, NS1619, resulted in decreases of frequency and amplitude in the control, but only decreases of frequency in DI. The block of small conductance Kca (Skca) by apamin resulted in increases of frequency and amplitude in both control and DI groups, but the opener, Chlorzoxazone, resulted in decreases of frequency and amplitude in the control, but only decrease of frequency in DI. The contraction alterations of DI were significantly lower than those of the control no matter Kca was blocked or opened. NFA, a selective Clca blocker, resulted in no significant frequency and amplitude alteration in the control, but significant decrease in DI. Conclusion These results suggested that Kca and Clca play a critical role in the modulation of detrusor contraction, and the down regulation of Kca and up regulation of Clca suggests that disorder of calcium related regulation may play an important role in DI.