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Objective:To analyze the bubble dynamic characteristics of shock wave enhanced emission photoacoustic streaming(SWEEPS)technique in free water region under different temporay delays.Methods:The Er∶YAG laser tip was activated in free water model with SWEEPS mode at 150-600 μs pulse delay.The bubble dynamic process during irrigation was recorded by a high-speed camera(200 000 Hz).Matlab was used to analyze the interaction between bubble made by the dual pulses frame by frame.The distance between bubble remnants and laser tip was measured before the bubble disappeared.The experimental data were statisti-cally analyzed by SPSS 19.0.Results:In free water region,different temporal delays caused different interaction between the bub-bles activated by the SWEEPS technique with a dual pulse modality.The interactions include bubble fusion,bubble collision and bubble separation.When the temporal delay between 360-440 μs,bubble collision was the most violent,and the farthest distance between bubble remnants and laser tip was reached.Conclusion:In free water region,the dual pulse of SWEEPS technique can lead to bubble interaction which may enhance the cavitation effect of Er∶YAG laser irrigation,and improve the debridement in clinic ap-plication.
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Objective:To study the possible effect of soft tissue displacement in the surgical design of primary unilateral cleft lip repair.Methods:Charts of 52 unilateral cleft lip patients who got repaired from January 2014 to December 2015 in Peking Union Medical College Hospital were retrospectively reviewed. The nasolabial region measurements of these 52 cases during the lip surgery were especially collected. The distance between the key points in the upper nasolabial region were directly measured with a ruler and/or caliper. The cleft lips were repaired by rotation-advancement technique. The soft tissue along the cleft edge was sufficiently released, and the muscles were reconstructed.Results:Except the lip height and the distance between crista philtral point and subalar base on the noncleft side, most measurements between the key points on both sides got significant increase postoperatively ( P<0.05). The symmetrical ratio of the preoperative measurements on upper labial region were closing to 1 departing from the cleft region. The symmetrical ratio improved significantly postoperatively ( P<0.01). Conclusions:During the primary unilateral cleft lip surgery, the changes of the distances between the key points of upper nasaolabial region would not always follow the geometry. They are also affected by other factors, like the interaction between each layer and the elasticity of soft tissue, which should be considered and employed during the surgical design.
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Objective: To evaluate the anti-gingivitis efficacy of a novel stabilized stannous-containing sodium fluoride dentifrice. Methods: A randomized, controlled and double blind clinical study was conducted. 156 adults with gingivitis were enrolled and randomly assigned to experimental group(group of novel stabilized stannous-containing sodium fluoride dentifrice, n = 51), positive control group (group of Yunnan Baiyao dentifrice, n = 54) and negative control group (group of Crest dentifrice, n = 51). Gingival health was assessed using Mazza Modification of the Papillary Bleeding Index(Mazza GI) at Baseline, day 3 and week 4 and pocket depth was evaluated at baseline and week 4, respectively. Results: At day 3 and week 4, the experimental and positive control groups exhibited lower clinical parameters than the negative control group(P＜ 0. 000 1). At week 4, the mean Mazza GI scores and PD of the experimental group were significantly lower than those of the positive control group(P＜ 0. 05). Conclusion: The novel stannous-containing sodium fluoride dentifrice has anti-gingivitis efficacy.
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Objective@#To investigate the effect of polydimethylsiloxane (PDMS) matrix elasticity on osteogenic differentiation of rat marrow stromal cells (rBMSC).@*Methods@#A series of PDMS composite substrates with different elastic modulus were constructed by adjusting the relative concentrations of cross-linking agent. The Young's modulus was used to describe the elasticity of PDMS after measurement by atomic force microscope (AFM). After surface modification, rBMSC was seeded on PDMS matrix, and 7 days after rBMSC was cultured on the five different Young's moduli matrix, the differences of osteogenic differentiation of rBMSC were observed by the method of real-time PCR, Western blotting, and alkaline phosphatase assay.@*Results@#The PDMS was suitable for cell culture after surface modification, and by altering the concentration of cross-linking agent, PDMS could mimic the majority of the tissues' elasticity in vivo. The related osteogenic differentiation markers expression showed significant difference between the five matrixes (P<0.05), including type Ⅰ collagen (Col-Ⅰ), osteocalcin (OCN), osteopontin (OPN) and bone morphogenetic protein 2 (BMP2). The expression of osteogenic markers was up-regulated in the group that the Young's modulus was (354.1±40.9) kPa (P<0.05).@*Conclusions@#PDMS is a tunable elasticity matrix which could be used in the investigation of inducing rBMSCs into osteoblastic lineages. PDMS substrate stiffness has an obvious influence on rBMSC osteogenic differentiation.
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Objective To analyze the clinical characteristics of IgG4-related disease (IgG4-RD)so as to improve the understanding of IgG4-RD in China.Methods IgG4-RD patients were recruited from Peking Union Medical College Hospital between January 2011 and January 2016.All patients were followedup for more than 6 months.The demographic characteristics,symptoms,organ involvements,laboratory examinations and treatment efficacy were evaluated and analyzed.Results A total of 346 patients were finally enrolled,including 230 males (66.5％) and 116 females (33.5％).The mean age of disease onset was (53.8 ± 14.2) years old.The mostly common involved organs were lymph nodes (56.4％) and submandibular glands (52.6％).Other affected organs and manifestations included:swelling of the lacrimal glands (46.5％),autoimmune pancreatitis (38.4％),pulmonary involvement (28.0％),sclerosing cholangitis (25.4％),naso-sinusitis (23.4％),parotid gland swelling (21.7％),retroperitoneal fibrosis (19.9％),large arteries involvement (9.5％),kidney involvement (obstructive nephropathy caused by retroperitoneal fibrosis was excluded) (6.9％),skin lesions (6.4％).Rare features consisted of thyroid glands,pituitary glands,gastrointestinal tract,pachymeningitis,pericardium,sclerosing mediastinitis and orchitis.The majority of patients had multi-organ involvement,such as 74.3％ patients with 3 and more,18.2％ and 7.5％ patients with 2 and single organ involvement respectively.The average IgG4-RD responder index (IgG4-RD RI) was 13.21 ±5.70.History of allergy was found in 172 (49.7％) patients.As to the laboratory tests,elevated serum IgG4 levels were confirmed in 285 (94.1％) patients,which was positively correlated with IgG4-RD RI.There were 33.5％ patients receiving monotherapy of glucocorticoid,52.6％ treated with glucocorticoids combined with immunosuppressive agents,4.9％ patients with immunosuppressant only,and 9.0％ patients with mild disease not receiving medication.The majority (336,97.1％) patients improved the above regimens.Conclusion IgG4-RD is a systemic fibro-inflammatory disease with multiple organ involvement.The mostly common involved organs include lymph node,submandibular glands,and pancreas.Glucocorticoids and immunosuppressive agents were effective for IgG4-RD.
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Objective:To explore the effect of paclitaxel (PTX) and cisplatin (DDP) on the expression of NKG2D ligands of hu-man esophagus carcinoma cell EC9706 and on the cytotoxicity of cytokine-induced killer (CIK) cells, as well as to discuss its molecu-lar mechanisms. Methods: The half maximal inhibitory concentration (IC50) values of PTX and DDP against EC9706 cells for 24 h were measured by MTT assay. The expression levels of NKG2D ligands (MICA, MICB, ULBP1, ULBP2, and ULBP3) on the EC9706 cell surface before and after 24 h culture with 1/2 IC50 of PTX or DDP were assayed by flow cytometry. Cytotoxicity of CIK cells against EC9706 cells before and after 24 h culture with 1/2 IC50 PTX or DDP was analyzed by lactate dehydrogenase release assay at an effector to target cell ratio (E:T) of 20:1 and 30:1, respectively. The expression levels of DNA damage repair genes (ATM, ATR, CHK1, CHK2, and p53) of EC9706 cells before and after 24 h incubation with 1/2 IC50 PTX or DDP were detected by quantitative fluorescent PCR. Results:The IC50 values of PTX and DDP were 10 and 5μg/mL, respectively. MICB, ULBP2, and ULBP3 on EC9706 cells were upregulated after 24 h culture with 1/2 IC50 PTX (P0.05), whereas ATM, ATR, CHK1, and CHK2 were over-expressed after 24 h treatment with 1/2 IC50 DDP (P<0.05). Conclusion:PTX or DDP can enhance the susceptibility of EC9706 cells to CIK cell-mediated lysis by upregulating the expression of NKG2D ligands through activating DNA damage repair genes.
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Objective To introduce a method to aid dental treatment for autistic children; midazolam oral sedation. Methods 10 autistic children who can not be managed under normal dental procedures were administrated oral midazolam (0.5mg/kg) before treatment. Once they were adequately sedated, dental treatment was carried out in outpatient. During the whole course, their finger oxygen saturation and heart rate were inspected. Painless methods were also applied. The duration of each treatment was controlled within 30min. When the procedure ended, the autistic children were inspected until recovery from sedation and then discharged with their parents. Results 10 children aged 4～10y totally underwent 17 visits to complete all dental treatment. The average ages were (6.00?1.89)y, body weight was (28.10?9.36) kg and Houpt scales were (4.71?0.77). They were all successfully sedated and managed and no severe complications were found. Conclusion The oral midazolam sedation showed satisfactory effects on this group of autistic children while studies of large samples are needed to draw a definite conclusion.
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Objective To make cephalometric analysis on the morphology of mandibular angle and its relationship with adjoining craniomaxillofacial structures in adults, and to discuss the application of the results in preoperative analysis and operation design. Methods Cephalometric analysis was made on the following parameters in 30 adults (15 men and 15 women) for frontal and lateral cephalometric radiograms: the distance between the mandibular angles (Go Go) and between the malar points (Zy Zy), and the mandible mental angels (Zy Go Me) on an anteroposterior cephalometric radiograph; the gonial angle (Ar Go Me), mandibular plane sella nasion angle (MP SN) and ramus plane sella nasion angle (RP SN). Results Go Go in male was (130?6) mm, female (116?6) mm; Zy Zy in male was (156?5) mm, female (146?5) mm; Zy Go Me in male was (117?5)?, female (119?5)?; Ar Go Me in male was (117?5)?, female (119?5)?; MP SN in male was (27?5)?, female (29?5)?; RP SN in male was (94?5)?, female (93?5)?. Conclusion The morphology of mandibular angle should be envisioned in three directions. The results of evaluation can be served as the reference of preoperative analysis and surgery design.