OBJECTIVETo compare the influence of polishing and glazing on ceramic surface roughness and bacterial adhesion to the resulted surfaces.

METHODSThe surface of the ceramic plates were tested and analyzed by atomic force microscope. The influence of resulted surface on Streptococcus mutans adhesion were also evaluated.

RESULTSThe ceramic surface became much smoother after polishing with diamond paste or self-glazing. A positive correlation between surface roughness and bacterial adhesion were observed. Compared with surfaces polished with rubber-wheel, surfaces polished with diamond paste or self-glazing reduced bacterial adhesion to the surface (P<0.05).

CONCLUSIONPolishing with diamond paste could be an alternative to self-glazing on ceramic surface roughness and bacterial adhesion.

Bacterial Adhesion ; Ceramics ; Dental Polishing ; Dental Porcelain ; Diamond ; Humans ; Streptococcus mutans ; Surface Properties

Objective To explore contrast-enhanced ultrasonography (CEUS) in diagnosis renal injuries complicated with active bleeding of different velocity,and analysis the related factors of renal traumatic degree.Methods Thirty-four Ⅰ - Ⅴ grade lesions of renal injury were made in 4 dogs and 6 New Zealand rabbits.Two and three dimensional CEUS were used to observe traumatic extension,and traumatic position,involving in vascular as well.Then the injury condition was classified and assessed synthetically.Results The range of lesions observed by using 2D and 3D ultrasound had consistency with those of the pathologic sample (length-diameter:F =0.4724,P =0.6252; transverse diameter:F =1.6174,P =0.20490),3D-CEUS can display the vascular that involved by renal injury.In the same traumatic extension condition,the time of animal becoming shocked and injury severity was related to not only traumatic extension but also different velocity of active bleeding and involving in vascular.Conclusions Contrastenhanced ultrasound can objectively reflect renal injury severity,and more information can be provided to clinical for management.

Humans ; Lung ; Lung Diseases ; rehabilitation ; Pneumoconiosis ; rehabilitation ; Respiratory Therapy

Objective To explore imaging feature of muscle crush injury of extremity on contrast enhanced ultrasound (CEUS) by an animal experiment.Methods Twenty-eight New Zealand rabbits were anesthetized by intramuscular pentobarbital sodium (30 mg/kg).A special balloon cuff device was used to create left hind leg crush injury with a force of (18.6 kPa).23 of the 28 rabbits had crush injury of extremity and survived for 72 hours.CEUS evaluated infusion model and contrast intensity in crush region of hind leg at the 0.5,2,6,24 and 72 hour after the release of the crushing pressure.Peak intensity (PI) was analyzed by comparing with serum creatinekinase (CK) and myoglobin (MYO).Results Twenty-three rabbits presented that the area of crushed region in left hind leg was 60 cm2,accounting for 2.6％-3.0％ of body surface area.In different time after decompression,the crushed regions showed rapid enhancement and the intensity was higher than that of no-crushed region.The time-intensity curves of crushed regions all appeared as fast wash-in and slow wash-out.PIs of rushed regions were higher obviously than those of nocrushed regions (P ＜0.001).ROC curves were employed in diagnosis value of PI for crushed region.And PIs showed positive correlation with CK and MYO and the correlation coefficient was 0.833-0.996.Conclusions CEUS presents that the micro-circulation perfusion of the crushed muscle increased obviously after the release of the crush pressure.PIs evaluated quantitatively the micro-circulation perfusion changes.It suggests a potential alternative for evaluating micro-circulation abnormality and ischemia reperfusion injury of the muscle crush injury to extremities.

ObjectiveToexplore the appearance ofmusclecrushinjuryatquantitative ultrasonographic elastography by supersonic shear imaging (SSI).MethodsThe animal experiment was done using a special balloon cuff device to create left hind leg crush injury with a force of 18.6 kPa.Twentythree New Zealand rabbits had crush injury of extremity and survived for 72 hours.SSI quantitative elastography was performed in crushed and no-crushed regions of each rabbit hind leg.Quantitative lesion elasticity was measured in terms of the Young modulus (in kilopascals) at 30 min,2 h,6 h,24 h and 72 h after the release of the crushing pressure.A receiver operating characteristic (ROC) curve analysis was used to assess diagnostic performance.ResultsThe area of crushed region in left hind leg accounted for 2.6％ -3.0％ of body surface area in 23 rabbits.The crushed regions exhibited maximum elasticity values of (19.51 ± 6.74)kPa,(21.47 ± 5.54) Pa,(11.36 ± 5.35)kPa,(15.09 ± 3.31)kPa and (13.72 ± 3.74) kPa,and mean elasticity values of (12.44 ± 3.77)kPa,(13.20 ± 3.60)kPa,(6.80±2.86)kPa,(10.04 ± 2.95)kPa and (6.94 ± 0.97)kPa at 30 min,2 h,6 h,24 h and 72 h after the release of the crushing pressure.Comparing with those of no-crushed regions,they were higher obviously (P＜0.001).ROC curves showed that extremity crush injury was diagnosed by using elasticity value,and the greater the elasticity value,the greater the diagnostic value.Conclusions SSI provides quantitative elasticity measurements,thus adding complementary information that potentially could help in crush injury characterization with conventional ultrasonography.

ObjectiveTo study the regulatory effect of Tripterygium wilfprdii polyglycoside (TWP) on the expression of EGFR and ErbB-2 induced arthritis rats.The effect of TWP on arthritis was also explored.MethodsAfter the model of CIA rats were established,the expression of EGFR and ErbB-2 in the synovium and articular cartilage were tested by immunohistochemical stain and real time PCR.ANOVA was used for statistical analysis.ResultsThe protein and mRNA expression of EGFR and ErbB-2 in the synovium (EGFR 0.268±0.059,ErbB-2 0.25±0.04,EGFR mRNA:14.2±0.55,ErbB-2 mRNA 23.46±3.64) and articular cartilage (EGFR 0.193±0.018,ErbB-2 0.217±0.033,EGFR mRNA:4.16±0.50,ErbB-2 mRNA 9.23±0.66) of the model group were significantly higher than those of the control group(P＜0.01).After being treated with TWP and MTX,the protein and mRNA expression of the EGFR and ErbB-2 decreased markedly (P＜0.01).Conclusion EGFR and ErbB-2 may play an important role in the pathogenesis of arthritis development.The molecular mechanism that TWP can treat synovitis and bone destruction of RA is related to the inhibition of EGFR and ErbB-2.

Over one half the patients with rheumatoid arthritis (RA) are being treated with methotrexate (MTX). Although well proven, the efficacy of MTX varies in individual patients. This study examined the metabolic biomarkers that can be used to predict the therapeutic effect of MTX by using metabolomic analysis. Rats were immunized with collagen to rapidly cause collagen-induced arthritis (CIA) and then treated with 0.1 mg/kg MTX for 4 weeks. The clinical signs and the histopathological features of CIA were observed to evaluate the therapeutic effects. Urine samples of CIA rats were collected, and analyzed by using 600 M (1)H-nuclear magnetic resonance ((1)H-NMR) for spectral binning after the therapy. The urine spectra were divided into spectral bins, and 20 endogenous metabolites were assigned by Chenomx Suite. Multivariate analyses were performed to identify the spectral pattern of endogenous metabolites related to MTX therapy. The results showed that the clustering of the spectra of the urine samples from the responsive rats (n=20) was different from that from the non-responsive rats (n=11). Multivariate analysis showed difference in metabolic profiles between the responsive and non-responsive rats by using partial least squares-discrimination analysis (PLS-DA) (R(2)=0.812, Q(2)=0.604). In targeted profiling, 13 endogenous metabolites (uric acid, taurine, histidine, methionine, glycine, etc.) were selected as putative biomarkers for predicting therapeutic response to MTX. It was suggested that (1)H-NMR-based metabolomic analysis can be used to predict the therapeutic effect of MTX, and several metabolites were found to be related to the therapeutic effects of MTX.

Over one half the patients with rheumatoid arthritis (RA) are being treated with methotrexate (MTX). Although well proven, the efficacy of MTX varies in individual patients. This study examined the metabolic biomarkers that can be used to predict the therapeutic effect of MTX by using metabolomic analysis. Rats were immunized with collagen to rapidly cause collagen-induced arthritis (CIA) and then treated with 0.1 mg/kg MTX for 4 weeks. The clinical signs and the histopathological features of CIA were observed to evaluate the therapeutic effects. Urine samples of CIA rats were collected, and analyzed by using 600 M (1)H-nuclear magnetic resonance ((1)H-NMR) for spectral binning after the therapy. The urine spectra were divided into spectral bins, and 20 endogenous metabolites were assigned by Chenomx Suite. Multivariate analyses were performed to identify the spectral pattern of endogenous metabolites related to MTX therapy. The results showed that the clustering of the spectra of the urine samples from the responsive rats (n=20) was different from that from the non-responsive rats (n=11). Multivariate analysis showed difference in metabolic profiles between the responsive and non-responsive rats by using partial least squares-discrimination analysis (PLS-DA) (R(2)=0.812, Q(2)=0.604). In targeted profiling, 13 endogenous metabolites (uric acid, taurine, histidine, methionine, glycine, etc.) were selected as putative biomarkers for predicting therapeutic response to MTX. It was suggested that (1)H-NMR-based metabolomic analysis can be used to predict the therapeutic effect of MTX, and several metabolites were found to be related to the therapeutic effects of MTX.
Animals ; Antirheumatic Agents ; administration & dosage ; Arthritis ; chemically induced ; drug therapy ; urine ; Biomarkers ; urine ; Collagen Type II ; Dose-Response Relationship, Drug ; Immunosuppressive Agents ; administration & dosage ; Magnetic Resonance Spectroscopy ; methods ; Male ; Metabolome ; Methotrexate ; administration & dosage ; Proteome ; analysis ; Protons ; Rats ; Rats, Sprague-Dawley ; Reproducibility of Results ; Sensitivity and Specificity ; Treatment Outcome

OBJECTIVETo explore the efficacy of injectable gelatin matrix as a hemostatic agent for treatment of grade III-IV hepatic trauma to a canine model with contrast-enhanced ultrasound (CEUS) guidance.

METHODSTwenty-seven healthy adult dogs underwent celiotomy in induce grade III-IV hepatic trauma in the left lateral lobe of the liver. The dogs were then randomized into 3 groups, namely the treatment group in which the injectable hemostat was percutaneously injected into the injury site under CEUS guidance, and the positive and negative control groups with thrombin solution and normal saline treatment, respectively. Intra-abdominal blood loss within 30 min postoperatively, and alanine aminotransferase (ALT) and aspartate aminotransferase (AST) 7 days postoperatively were compared among the groups. Follow-up CEUS was performed in each animal 7 days after the operation.

RESULTSThe mean blood loss was 47.69 ml in the treatment group, significantly less than that in the positive control group (81.77 ml, P/0.01) and negative control group (110.35 ml, P<0.01). The treatment group had also significantly lower ALT and AST levels than the two control groups (ALT: 49.37, 62.81, and 82.83 U/L, respectively, P<0.05; AST: 48.32, 67.16, and 82.54 U/L, respectively, P<0.05). In the treatment group, CEUS did not detect hepatic lesions or ascites as found in the two control groups, and the perfusion of the liver was homogeneous.

CONCLUSIONThe injectable hemostat injected under the guidance of CEUS can effectively control grade III-IV hepatic hemorrhage in the canine model and show strong effects of stopping bleeding and promoting wound healing.

Animals ; Contrast Media ; Dogs ; Gelatin ; administration & dosage ; therapeutic use ; Hemostasis, Surgical ; Liver ; injuries ; Ultrasonography, Interventional

Three cases of swimming pool granuloma are reported.Case 1:a 40-year-old female presented with a 2-month history of nodules and plaques on the right hand and forearm.She was a tropical fish salesperson but denied trauma history.Skin examination revealed multiple irregularly sized,dark-red nodules and plaques on the joints of right fingers,wrist,and elbow,as well as multiple subcutaneous nodules simulating strings of beads on the right upper limb.Case 2:a 48-year-old female presented with a 2-month history of nodules and plaques on the left hand and forearm.There was a history of trauma due to tropical fish tank and filter cleaning.Physical examination showed multiple deep purple plaques and painless subcutaneous nodules scattered on the left hand,wrist,and upper limb.Case 3:a 39-year-old male presented with a 3-month history of nodules on the fingers of both hands.There was no history of trauma,but he was a tropical aquarist.Skin examination revealed multiple soybean-sized dark-red nodules on the extensor aspect of interphalangeal joints of both hands.Fungal examinations yielded negative results in the 3 cases,while histopathology revealed infectious granuloma with a mixed inflammatory cell infiltrate.All of the cases showed positive results in purified protein derivative (PPD)skin test.Mycobacterium marinum was isolated from the lesional tissue of Case 1 and 2,but not from Case 3.All the patients were diagnosed with swimming pool granuloma,and given anti-atypical mycobacterial therapy including oral rifampin and clarithromycin.The lesions disappeared after 1 to 3 months of treatment,with the treatment course varying from 2 to 5 months.No recurrence was observed during a 3- to 12-month follow-up.