Objective To evaluate the clinical effect of light cure Dyractflow (LCDF) in pit and fissure enamel-plasty sealant technique (EST). Methods A total of 400 first permanent molars in 200 patients aged from 6 to 10 years were treated with LCDF in occlusal pit and fissure enamel-plasty sealant technique. The opposite permanent teeth treated with LCDF in occlusal pit and fissure conventional sealant technique (CST) were employed as the controls. The patients were followed up for 3 years. Results Follow-up for 3 years showed that there was no significant difference in preservation rate between the EST and the CST groups in the first year, but in 2-3 years, there was significant difference in preservation rate (P

Objective To investigate the feasibility of high resolution melting(HRM)curve analysis technique for detecting β-thalassemia gene mutations.Methods The HRM method was used to detect five kinds of common β-thalassemia mutations (-28, CD17,CD41-42,CD71-72 and IVS-2-654)in Guangdong province.Sixty specimens of the patients with suspectedβ-thalassemia were performed the HRM analysis.The results of HRM analysis were confirmed by the direct DNA sequencing.Results Among 60 specimens of the patients with suspectedβ-thalassemia,12 cases of heterozygosis mutant gene were detected,including 3 cases of-28,2 cases of CD17,5 cases of CD41-42,2 cases of CD71-72 and 2 cases of IVS-2-654 gene mutation;2 cases of homozygosis mu-tant gene were detected,including 1 case of-28 and 1 case of CD41-42 homozygous mutation (both were amniotic fluid specimens). The results of HRM analysis were consistent with the DNA sequencing results.Conclusion The HRM method can accurately de-tect five kinds of common β-thalassemia mutations in Guangdong province,has the advantages of simpleness,rapidness and high sensitivity and is expected to be a new method for screening β-thalassemia mutation in clinic.

10.3969/j.issn.1000-3606.2013.06.024

10.3969/j.issn.2095-4344.2013.23.015

Objective To evaluate the efficacy and safety of oral ibuprofen for closure of patent ductus arteriosus (PDA) in preterm infants.Methods The related literatures till December 31st,2011 in Cochrane Library,PubMed,EMBASE,Ovid,Springer,China Academic Journal Full-text Database,Wanfang Database,VIP Database and China Biological Medical Literature Database were searched.The inclusion criteria were:(1) the subject of the research was preterm infants with birth weight less than 2500 g and/or gestational age less than 37 weeks; (2) randomized or semirandomized controlled trial; (3) the intervention group received oral ibuprofen,while the control group received oral placebos / intravenous indomethacin or ibuprofen; (4) the main outcome was the failure rate of PDA closure; (5) hemodynamic changes with PDA were detected by ultrasonography.Meta-analysis was performed by Review Manager 4.22 software.Results Eleven randomized controlled trials were included,among which,three were high quality reports.Meta-analysis showed lower failure rate of PDA closure in subjects received oral ibuprofen than in those received placebos orally (RR =0.22,95 ％ CI:0.14-0.35),while the number of infants required operative closure of PDA decreased significantly (RR =0.16,95％ CI:0.03-0.86).Further analysis showed the effect of oral ibuprofen was similar to intravenous indomethacin (RR =0.93,95 ％ CI:0.57-1.53),but better than intravenous ibuprofen (RR=0.42,95％CI:0.26-0.67).However,oral ibuprofen did not reduced the ratio of patients required operation compared with intravenous indomethacin or ibuprofen (RR=0.58,95％CI:0.24-1.41).The incidence of gastrointestinal hemorrhage was higher in oral ibuprofen group than that in placebos(RR=1.99,95％CI:1.13-3.50).The serum level of creatine was lower in oral ibuprofen group than in intravenous indomethacin or ibuprofen group (weighted average=-19.10,95％ CI:-25.12-12.31).Compared with intravenous indomethcin group,less necrotizing enterocolitis cases were identified in oral ibuprofen group,but no statistical significance was found (RR=0.57,95％ CI:0.30-1.09).No long-term outcome was reported in any selected literature.Conclusions Oral ibuprofen for PDA closure in preterm infants appears to be as effective as intravenous or indomethacin,and more effective than intraveous ibuproten.Oral ibuproten represents better safety.

Objective To explore the distributive changes of PIDD protein in HT29 cells stimulated by 5-fluorouracil(5-FU),and the influence of the PIDD protein interfered by small interference RNA(siRNA) on the drug resistance of HT29 cells in vitro.Methods siRNA was used to interfere the PIDD expression,and HT-29 cells were treated with 5-FU.Western blotting was employed to detect the PIDD expression before and after interference.The distribution of PIDD in nucleus and cytoplasm after 5-FU treatment was also detected.Changes in drug sensitivity of HT-29 cells to 5-FU were determined with MTT assay and IC50 values were evaluated.Results PIDD protein was expressed mainly in the cytoplasm before 5-FU stimulation,and it migraded into the nucleus after stimulation.Western blotting showed that the total PIDD expression and the expression both in cytoplasm and nuclei decreased significantly after RNA interference,and no increase of the total PIDD and that migrated into nucleus was found even after 5-FU stimulation.It was found that in the transfection group(cells were incubated 12h after being transfected with PIDD-360),normal group(cells without treatment) and control group(cells were incubated 12h after being transfected with negative transfection reagent),the IC50 values of cells treated with 5-FU were 0.23?0.06?g/ml,2.71?0.70?g/ml and 2.78?1.03?g/ml,respectively.The IC50 value declined significantly in transfection group compared with that of both the normal group and control group(P

Objective To observe the therapeutic effect of lymphoplasmapheresis (LPE) in treatment of Guillain-Barre syndrome (GBS). Methods The initial recovery time of muscle strength, muscle strength score difference, clinical therapeutic effect and the security after treatment with LPE were observed in 34 GBS patients. Meanwhile, 17 GBS patients applied with therapeutic plasma exchange (TPE) named TPE group were served as control group. Results LPE group was treated with LPE 51 times in all, and the mean times was 1.5. TPE group received TPE 33 times in all, and the mean times were 1.9. In LPE group, the average initial recovery time [(12.74?7.18)d] was significantly shorter than that in TPE group [(24.35?14.22)d] (P0.05).Conclusions The therapeutic effect of LPE is distinguished for treatment with GBS and the side effect is rare. It is worth to apply in clinic.

Objective To evaluate the value of double vital staining with both iodine and methylene blue in diagnosing early esophageal carcinoma. Methods Lugol' s iodine was sprayed on the esophageal lesions first, then methylene blue. The results before or after staining with mythylene blue were compared. The tumor infiltrative depth in the esophagus was assessed by gastric endoscopy and endoscopic ultrasonography (EUS). The tumors were resected surgically or under endoscopy. Results After Lugol's iodine spray it stained the normal esophageal squamous epithelium brown-black, whereas the lesions did not. In 10 cases with 11 lesions, 9 cases (81. 8% ) showed the margin of lesions fairly clear. After spray of methylene blue it stained all the lesions in blue color with clear margin. The mucosal resection was done in one case under endoscopy and surgical resection in 8 cases. All of the 9 cases were diagnosed pathologically squamus carcinoma including mucosal carcinoma, 6 lesions and submucosal carcinoma, 4 lesions. The pathological diagnostic accuracy in differentiating mucosal cancer from submucosal cancer by endoscopy or EUS was 80% ; by both endoscopy and EUS in conjunction was 90%. Conclusion Double vital staining with both iodine and methylene blue is very useful in revealing the area and infiltrative depth of early esophageal cancer.

The new cataloguing rules, RDA, have been implemented in NLM and more RDA bibliographic data can thus be accessed in domestic medical libraries when the Western documents are catalogued by offloading their bibliographic data.The differences in RDA and AACR2 were compared, the common modified fields and descrip-tive contents were described when the RDA bibliographic data were changed into AACR2 bibliographic data in order to provide certain reference for cataloguing of Western documents using the RDA bibliographic data.

Objective To evaluate the curative effect by using transmission straight wire appliance in treatment of adult patients with protruding,to compare with MBT straight wire technique,and to discuss their similarities and differences.Methods Totally 40 protruding patients were assigned into two groups randomly:the transmission straight wire technique group were treated with transmission straight wire appliance,and the MBT straight wire technique group were treated with MBT appliance together with extraoral arch or screw implant anchorage.Cephalometric measurements were compared before and after treatment.Results Average period of treatment was (19 ±4) months for transmission group and (23 ± 4) months for MBT group.The difference was statistically significant (P＜0.05).After treatment,U1/SN,U1/NA,U1-NA,L1/NB,L1-NB,U1-AP,L1-AP,UL-EP,LL-EP were significantly reduced for both patients groups (P＜0.01).U1/L1,nasolabial angle and z angle were increased for both groups (P＜0.05).MP/SN increased by 1.93°(P＜0.05)for transmission group vs.0.81° (P＞0.05) for MBT group.There was no statistically significant difference between the two groups (P＞0.05) except MP/SN (P＜0.05).However,the retraction of anterior teeth in transmission group was greater than that of MBT group,and U1/NA changed (-20.95±8.79)° in transmission group vs.(-16.00 ± 6.52)° in MBT group.Conclusions Both techniques can achieve satisfactory results for protruding cases.The transmission technology can improve soft tissue profile quicker,but anterior teeth have excessive vertical trend,where attention should be paid to control torque on anterior teeth.