Objective:To compare the efficacy on root canal debridement of three ultrasonic units Odontoson-M, P-MAX and Spartan. Methods: Extracted healthy premolars with one single straight canal were used. The canals were prepared by step-down technique. After preparation, the canals were received ultrasonic irrigation and split longitudinally. Debris scores were calculated after photographing with a digital camera. The number of visible open dentinal tubules were evaluated by SEM. Results: At middle third of the canals, when irrigated with 5 g/L NaOCl, the debris score in group Odontoson-M was significantly lower than that in other groups(P

Environmental Monitoring ; methods ; Inhalation Exposure ; Occupational Exposure ; analysis ; Workplace

Purpose To investigate the value of dual-source CT with dual-energy virtual non-contrast imaging in the diagnosis of cervical lymph node disease. Materials and Methods The dual-energy scan data of 126 lymph nodes from 50 patients confirmed pathologically were reviewed. The difference of average CT value, signal to noise ratio, contrast to noise ratio, image subjective assessment and lesion detectability between virtual non-contrast imaging and conventional non-contrast scan were analyzed. The radiation dose of virtual non-contrast imaging and real non-contrast imaging of cervical lymph node were also compared. Results ①The consistency of virtual plain scan combined with dual-energy contrast imaging in the diagnosis of six typical pathological types were all satisfactory (Kappa>0.7, P<0.01), and the detection rate of non-specific lymphadenitis, lymphomas and lymph node metastasis of thyroid carcinoma was higher among the six types (93.1%, 86.7% and 100.0%, respectively, Kappa=0.983, 0.893; P<0.01), and had the highest detection rate of lymph node metastasis of thyroid carcinoma (100.0%, Kappa=1.000, P<0.01). ②There was no significant difference among the average CT, signal to noise ratio and contrast to noise ratio of conventional scan and virtual non-contrast imaging during arterial phase and venous phase (H=3.125, 4.374, 4.037;P>0.05).③ Compared with conventional enhanced scan, dual-energy phases reduced radiation dose by about 19%. Conclusion Dual-energy virtual non-contrast imaging combined with contrast imaging can provide clear images in the diagnosis of enlarged cervical lymph nodes and reduce radiation dose of subjects, thus can be expected to replace real scan.

0),whose mean calcification score was 1935.54(0～9833). Patients with calcification score ≥100 had significantly higher morbidity of cardiovascular diseases, serum phosphate level, calcium-phosphate product, C-reactive potein concentration and lower serum albumin than patients with calcification score

To discuss bacteria of urine infection reoccurrence , the routine culture and L-form bacteria culture of urine tract infection on 850 cases were adopted and clinica l watching and analysis of the bacteria plasmid were held ．Result: of the l28 cases, re-infec tion rate l5.0%．,the positive rate of the routine bacteria culture for those initial diagnosis patie nts was 58.3% while that of the re-infection patients was 34.0% P<0.0l ．The initia l diagnosis L-form inspected rate 5.6%yet that of re-infection was up to 32.0 % P<0.01 ．The analysis of the pla smid bacteria of re- infection were of the same origins ．Conclusion: the first infection dont nee d L-form culture but re- infection should have L-form culture ．Analysis: plasmid positive bacteria of r e-infection was the result of the first infection not completely cured．

Objective To investigate the effectiveness and safety of intranasal different dose of dexmedetomidine for pediatric echocardiography sedation and to discuss the factors concerning recovery.Methods In a single-blinded randomized clinical trial,183 children were studied with a range of 2months and 33 months of age,and American Society of Anesthesiologists(ASA) physical status Ⅰ to Ⅱ.Those children were divided randomly into one of three groups.Groups D1,D2,and D3,which were received intranasal dexmedetomidine 1.0,1.5,and 2.0 μg/kg,respectively.The induction time,recovery time,examination time,and total sedation time were compared.The success rate of sedation and the occurrence of any side-effects with the drug were compared.Sex,age,weight,dose,induction time,and examination time were used as independent valuations,the recovery time was used as dependent valuation,and then the multiple linear regression analysis was performed to filtrate and formulate the valuable factors influencing recovery time.Results The induction time had no significantly difference among groups (P ＞ 0.05).The recovery time of group D3 was longer than group D1 and group D2 (P ＜ 0.05).The total sedation time of group D3 was longer than group D1 (P ＜ 0.05).The success rate of sedation and the incidence of sideeffects had no significantly difference among groups (P ＞0.05).Children's weight and medicine dose were found to affect recovery time.Conclusions Intranasal dexmedetomidine 1 ～ 2 μg/kg could be used effectively and safely in children undergoing echocardiography examination.Weight and dose were considered as key indexes to predict recovery time.

Objective To study decompression and internal fixation combined with interbody fusion for degenerative lumbar spinal ste-nosis. Methods One hundred cases with degenerative lumbar spinal stenosis from January 2012 to June 2012 were researched. They were randomly divided into observation group and control group. Fifty patients in the control group,they were given treatment of interbody fusion. The observation group had 50 patients,using decompression and internal fixation on the basis of the control group. The back pain VAS score, leg pain VAS score,disc height,Cobb angle,ODI score of patients 3 months and 2 years after treatment were compared with each other. Re-sults After 3 months of treatment,back pain VAS score, leg pain VAS score,ODI scores of the observation group were lower than those of the control group,the difference was significant (P<0. 05). Intervertebral height of observation group was higher than that of control group, the difference was significant(t=4. 110 0,P=0. 000 1). After 2 years of treatment,back pain VAS score,leg pain VAS score and ODI score of the observation group was still lower than those of the control group, the difference was significant(P<0. 05). Intervertebral height of the observation group still higher(P<0. 05). The change of Cobb angle was not obvious. Conclusion Decompression and internal fixation com-bined with interbody fusion for degenerative lumbar spinal stenosis has a good effect,which is worthy of promotion in clinic.

Smoke water and distillation liquid were used to treat the seeds of Trichosathes kirilowii and to study the effects of smoke water and distillation liquid on the seed germination and seedling growth of T. kirilowii. The results showed that germination rate, germination index and germination vigor of T. kirilowii all were significantly improved with the treatment of SW and DL treatment. The activity of α-amylase were significantly increased with the treatment of SW and DL at 1:2,000. SW and DL treatment showed no significant effects on the activity of SOD. The activity of POD were markedly enhanced under the treatment of SW (1:000) and DL (1:2,000). CAT activity were increased with the treatment of SW and DL at 1:2,000 while were inhibited by SW and DL at 1:500. Seedling height and root length were increased with the treatment of SW and DL (1:1,000, 1:2,000). SW and DL treaments improved the content of chlorophyll, and moreover with the concentration of SW and DL, the stimulatory were also increased. This work demonstrated that smoke water and diatillation liquid at 1:2,000 could stimulate the seed germination and seedling growth of T. kirilowii, and it provided the references for the study of seed germination technology.
Agriculture ; instrumentation ; methods ; Distillation ; Germination ; Seedlings ; growth & development ; metabolism ; Seeds ; growth & development ; metabolism ; Smoke ; analysis ; Trichosanthes ; growth & development ; metabolism ; Water ; chemistry ; metabolism

ObjectiveTo observe the expression of bone sialoprotein(BSP) and matrix metalloproteinase-9 (MMP-9) in calcified valves of patients with rheumatic heart disease.MethodsA total of 150 mitral valves which were resected by surgery were divided into rheumatic group ( 120 valves) and nonrheumatic group (30 valves).Immunohistochemical staining was taken by SP method and the expressions of BSP and MMP-9 in two groups were observed and compared.ResultsThe positive expressions of BSP and MMP-9 in rheumatic group were 91.7％(110/120) and 90.8％(109/120),respectively,which were significantly higher than those in non-rheumatic group [23.3％(7/30) and 20.0％(6/30) ](P＜ 0.01 ).Conclusions The expressions of both BSP and MMP-9 are higher in the valves of patients with rheumatic heart disease.The calcification of rheumatic mitral valves is closely related with the degradation and remodeling of extracellular matrix caused by MMP-9,and osteoblast-like bone formation induced by BSP.

, but the amount decreased significantly. Conclusions Peri-operative nursing can promote the recovery of patients with pelvic floor hernia, rectal prolapse combined with colonic slow transit constipation.