BACKGROUND:Studies have shown that posterior orthopedic internal fixation and anterior orthopedic internal fixation al can get good clinical outcomes for treatment of adult idiopathic scoliosis, however, it has not been reported on what kind of methods could achieve a better clinical outcome for treatment of Lenke3 type adult idiopathic scoliosis, have less risk of pedicle screws breakage and more reliable long-term efficacy. OBJECTIVE:To establish the Lenke 3 type adult idiopathic scoliosis finite element model and thoracic screw guide target 3D model using finite element analysis software, so as to provide scientific basis for biomechanical analysis and scientific pedicle screw implantation. METHODS:The CT scan image from T 1 to sacrum of one 28 years old volunteer with Lenke 3 type adult idiopathic scoliosis was imported into Mimics 16.0 software by Dicom form. Integral idiopathic scoliosis three dimensional model was established by geometry clear technology. Nail guide target of thoracic vertebra was established on vertebral model by design module in Mimics 16.0 software. The point cloud form of three dimensional model was imported into Geomagic Studio 11.0 software. Series of image processing of model were conducted. At last, three dimensional model was imported into ANSYS 14.0 finite element analysis software in order to build finite element model with biological properties. RESULTS AND CONCLUSION:Complete Lenke 3 type adult idiopathic scoliosis three dimensional finite element model was established successful y. It concluded 440 975 tetrahedron units and 580 bar units, total y 441 555 units and 1 077 318 nodes. Total y 12 nail guide target models of thoracic vertebra were established, including 4 682 tetrahedron units and 7 390 nodes. Lenke 3 type adult idiopathic scoliosis three dimensional finite element model and nail guide target of thoracic vertebral model with a realistic appearance were established successful y in this experiment. These results confirm that Lenke 3 type adult idiopathic scoliosis three dimensional finite element model provides scientific basis for further biomechanical experiments. Meanwhile, the construction of nail guide target model of thoracic vertebra provide a new scientific method for thoracic pedicle screw placement.

In this study, the buffering capacity of amphiphilic pH-sensitivity copolymer poly(2-ethyl-2-oxazoline)-cholesteryl methyl carbonate (PEOZ-CHMC) was evaluated. The ammonium sulfate gradient method was used to prepare doxorubicin hydrochloride (DOX x HCl)-loaded liposomes (DOX-L), and then the post-insertion method was used to prepare PEOZ-CHMC and polyethylene glycol-distearoyl phosphatidyl ethanolamine (PEG-DSPE) modified DOX x HCl-loaded liposomes (PEOZ-DOX-L and PEG-DOX-L). The physico-chemical properties, in vitro drugs release behavior, cellular toxicity and intracellular delivery of liposomes were evaluated, separately. The results showed that PEOZ-CHMC has a satisfactory buffering capacity. The sephadex G-50 column centrifugation method and dynamic light scattering were used to determine the encapsulation efficiency (EE) and particle size of liposomes. The EE and particle size of DOX-L were (97.3 ± 1.4) % and 120 nm, respectively, and the addition of PEOZ-CHMC or PEG-DSPE had no influence on EE and particle size. The zeta potentials of three kinds of liposomes were negative. The release behavior of various DOX liposomes in vitro was investigated by dialysis method. In phosphate buffer solution (PBS) at pH 7.4, DOX x HCl was released from PEOZ-DOX-L in a sustained manner. While in PBS at pH 5.0, the release rate of DOX x HCl from PEOZ-DOX-L increased significantly, which suggested DOX x HCl was released from PEOZ-DOX-L in a pH-dependent manner. The intracellular delivery of liposomes was investigated by confocal laser scanning microscopy (CLSM). The CLSM images indicated that PEOZ-DOX-L showed efficient intracellular trafficking including endosomal escape and release DOX x HCl into nucleus, as well as the DOX-L and PEG-DOX-L had no this effect. The cytotoxicity of liposomes against MCF-7 cells was detected by using MTT assay. The results showed that antiproliferative effects of PEOZ-DOX-L enhanced with pH value decreased, whereas DOX-L and PEG-DOX-L did not have any significant difference in inhibitions at different pH conditions. Therefore, the problems of the inhibition of cellular uptake of liposomes and the failed endosomal escape of pH-sensitive liposomes by PEG chain can be overcome by the pH-sensitive liposomes constructed by PEOZ-CHMC.
Cell Nucleus ; Doxorubicin ; analogs & derivatives ; chemistry ; Endosomes ; Formates ; chemistry ; Humans ; Liposomes ; chemistry ; MCF-7 Cells ; Microscopy, Confocal ; Particle Size ; Phosphatidylethanolamines ; Polyamines ; chemistry ; Polyethylene Glycols ; chemistry

OBJECTIVETo evaluate the clinical results of dental implant treatment with platform switching technique in esthetic zone and to investigate its technical characteristics.

METHODSSeventeen patients who were partially edentulous in esthetic zone were included and received a total of 26 Frialit-2 system implants in Center of Dental Implantation, Peking University School and Hospital of Stomatology from January to December 2001, and the platform switching technique was applied. The mean follow-up time was 56.3 months (24 to 74 months). Clinical examination and X-ray were conducted.

RESULTSClinical results of all implant restoration that used platform-switched abutments were satisfied. No implant loss or other severe complications occurred. The medians of marginal bone loss 1 year and 5 years after final restoration was 0.13 (-0.12 - 0.55) mm and 0.27 (-0.04 - 0.77) mm respectively. The medians of interimplant crestal bone resorption was 0.14 (0.00 - 0.30) mm and 0.21 (0.09 - 0.31) mm after 1 year and 5 years' functional loading respectively. According to Jemt classification of papilla, 23 sites reached II degree, and 10 sites reached III degree among 36 sites 5 years after prostheses. The mean value of pink esthetic score (PES) was 11.8 (10 - 14).

CONCLUSIONSPlatform switching is a simple and reliable technique for dental implant treatment, helping to control marginal bone loss and ensure an esthetic results in the esthetic zone.

Adult ; Alveolar Bone Loss ; surgery ; Dental Implantation ; methods ; Esthetics, Dental ; Female ; Humans ; Male ; Middle Aged ; Young Adult

Objective To analyze the clinical features of recurrent acute pancreatitis (RAP).Methods The clinical data of patients diagnosed as RAP were collected in Changhai Hospital, the Second Military Medical University between January 2016 to July 2016, and chronic pancreatitis(CP) patients and RAP patients to matching, as control group.A prospective cohort study about the clinical features of RAP and CP was set.The survival analysis model was established by Kaplan-Meier′s method, to calculate the cumulative rate of RAP which progressed into CP.Results The morbidity of male patients was 69.0% in the RAP group(n=100) and 60% in the CP group(n=100).The average first onset age of RAP and CP was 38 and 21 years old, respectively;and the teenagers accounted for 12% and 38.6%.The incidence of diabetes was 49.5% and 9%;and the incidence of fatty diarrhea was 46.6% and 19% of the two groups.The cumulative incidence of CP was 2% within 1 year, 4.6% in 3 years, and 12.4% in 5 years.Conclusions Men has higher morbidity in both RAP group and CP group.RAP patients′ first onset age was older than that of CP.Teenagers had a low incidence in RAP group.The risk of diabetes and fatty diarrhea was lower in RAP group than CP group.A certain proportion of RAP patients can progress to CP.

Objective To investigate the impact of hepatitis C virus (HCV)-RNA levels on human immunodeficiency virus (HIV)-1 disease progression in Chinese HIV/HCV co-infected individuals. Methods Cross-sectional analysis was performed among 391 HIV-infected patients for assessment of HCV-IgG, HCV-RNA, HIV-RNA, CD4 cell counts and cell surface markers of immune activation, to compare the difference of viral and immune indexes between HCV-RNA high group and HCV-RNA low group, and to elucidate the association between HCV-RNA, HIV-RNA and CD4 cell counts in HIV/HCV co-infected patients. Results (1) The percentage of anti HCV-IgG positive of former plasma donor group (93%) and drug-injection group (97.5%) were significantly higher than that of sexual transmission group (20.1%). The percentage of HCV-RNA positive of drug-injection group (89.9%) was significantly higher than that of former plasma donor group (48.3%) and sexual transmission group (62.5%), P<0.01, respectively. (2) HCV-RNA levels were positively correlated to HIV-RNA levels (r=0.237,P

Humans ; Perineum ; Rhabdomyosarcoma/diagnosis*

As an increasing number of emerging anti-tumor drugs are approved and marketed,the imperative for clinical safety monitoring and risk information management has grown significantly.Drug-induced neuropathy associated with these drugs exhibit characteristics such as insidious onset,rapid progression,and challenging treatment,ultimately leading to treatment failures.Therefore,a comprehensive understanding of the risk of neuropathy induced by emerging anti-tumor drugs,coupled with risk surveillance and early warning,as well as management and reporting,can significantly reduce the incidence and severity of drug-related diseases.This paper provides a review of the neuropathy caused by emerging anti-tumor drugs,introduces the pharmacovigilance system and risk information management measures in clinical usage,aiming to provide a reference for guiding the rational clinical use and minimizing the incidence of drug-induced diseases.

OBJECTIVETo investigate the effect and safety of the hook needle knife for the treatment of stenosing tenovaginitis of flexor digitorum.

METHODSFrom September 2007 to September 2008, 60 outpatients with stenosing tenovaginitis of flexor digitorum were randomized divided into the treatment group and the control group, 30 cases in each group. Among the patients, 44 patients were female and 16 patients were male, aged from 34 to 69 years, averaged 56 years, the duration of disease ranged from 1 month to 1 year, averaged 3 months. All the patients were treated with hook needle knife and local-blocking respectively. The patients were followed up for 6 months, and the relief of moving-pain, tender-pain, stretching-pain and resist-ing--pain were observed respectively. All the patients were evaluated by the symptoms with numerical rating scale.

RESULTSThe relief of moving-pain, tender-pain, stretching-pain and resisting-pain in the treatment group were significantly better than those of the control group; and the therapeutic effects of treatment group were better than those of the control group.

CONCLUSIONThe method for treating stenosing tenovaginitis of flexor digitorum with hook needle knife has advantages of definite effects, micro-invasion and safety.

Adult ; Aged ; Female ; Humans ; Male ; Medicine, Chinese Traditional ; Middle Aged ; Minimally Invasive Surgical Procedures ; methods ; Tendon Entrapment ; surgery

Objective:To evaluate the effect of parecoxib sodium on phenotypic transformation of alveolar macrophages in a mouse model of ventilator-associated lung injury (VALI).Methods:Forty-five SPF healthy adult male C57BL/6J mice, weighing 22-30 g, aged 8-12 weeks, were divided into 3 groups ( n=15 each) using a random number table method: sham operation group (S group), VALI group (V group) and parecoxib sodium group (P group). Lipopolysaccharide 20 ng was intraperitoneally injected, and 2 h later the animals were mechanically ventilated (tidal volume 30 ml/kg, respiratory rate 70 breaths/min, inspiratory/expiratory ratio 1∶2, fraction of inspired oxygen 21%, positive end-expiratory pressure 0) for 4 h to establish the model of VALI.Parecoxib sodium 30 mg/kg was intravenously injected at 1 h prior to mechanical ventilation in group P. The mice were sacrificed at 4 h of ventilation, the right lung was lavaged and the broncho-alveolar lavage fluid (BALF) was collected for determination of interleukin-6 (IL-6), IL-10 and tumor necrosis factor-alpha (TNF-α) concentrations (by enzyme-linked immunosorbent assay), expression of inducible nitric oxide synthase (iNOS) and arginase-1(Arg-1) in BALF and expression of phosphorylated Janus kinase 2 (p-JAK2) and phosphorylated signal transduction and transcription activator 3 (p-STAT-3) (by Western blot). The left lung was removed for determination of the wet/dry weight ratio (W/D ratio) and for examination of the pathological changes which were scored. Results:Compared with group S, the lung injury score, W/D ratio, concentrations of IL-6, IL-10 and TNF-α in BALF, and expression of iNOS, Arg-1, p-JAK2 and p-STAT-3 were significantly increased in V and P groups ( P<0.05). Compared with group V, the concentration of IL-10 in BALF and expression of Arg-1, p-JAK2 and p-STAT-3 were significantly increased, and the lung injury score, W/D ratio, concentrations of IL-6 and TNF-α in BALF and expression of iNOS were decreased in group P ( P<0.05). Conclusion:Parecoxib sodium promotes phenotypic transformation of alveolar macrophages from M1 subtype to M2 subtype and inhibits inflammatory responses, thus alleviating VALI, which may be related to activating JAK2/STAT-3 signaling pathway in mice.

Adult ; Aged ; Carcinoma, Hepatocellular ; metabolism ; Cell Line, Tumor ; Female ; Gene Expression Regulation, Neoplastic ; Humans ; Liver Neoplasms ; metabolism ; Male ; Middle Aged ; Proto-Oncogene Proteins ; metabolism