Objectives:To evaluate the efficiency of packing jaw defects with a composite of coral and bone marrow.　Methods:Twelve patients (9 with jaw cyst and 3 with ameloblastoma) underwent enucleation of jaw lesion and packing with a composite of coral and bone marrow.Repair of the bone defects was evaluated at 1 week,1,6 and 12 months postoperatively by clinical examination and X-ray films.　Results:Wound healing after the operations on 10 patients was uneventful,and definite ossification around the implanted material could be detected at 1 month postoperatively.A lot of bone formation and partial resorption of coral were observed at 6 months postoperatively.Complete resorption of coral and complete bone repair were obtained at 12 months postoperatively.Wound breakdown was observed on two other patients,and the composite had to be removed completely.　Conclusions:A composite of coral and bone marrow may enhances bone healing in jaw defects after cyst or ameloblastoma removal.

Objective:To establish a highly sensitive, rapid and selective liquid chromatography mass spectrometry (LC-MS) method for the determination of metoprolol in rat plasma.Methods:A simplified liquid-liquid extraction with acetidin was employed for the sample preparation. The separation was carried out on a Thermo ODS-C_(18)(5 μm,100 mm×2.1 mm).The mobile phase consisted of acetonitrile-methanol-water(20∶20∶60). Propranolol was used as the internal standard. The detection was performed on a liquid chromatography mass spectrometry by selected ion monitoring(SIM) scan mode electrospray ionization(ESI).Results and Conclusion:The range of calibration curve was 0.1-50 ng/ml and the limit of quantification was 0.1 ng/ml. The intra- and inter-day precision RSD was less than 15%.This method is sensitive, simple,rapid and suitable for the pharmacokinetic study of metoprolol.

Objectives: To study the histopathological grading and the clinical-staging system on the surgical prognosis in patients with mucoepidermoid carcinoma(MEC) of the salivary glands. 　Methods: Analysis were made to the primary sites, clinical findings and the correlation between the histopathological-grading/clinical-staging system and the surgical prognosis in 43 patients with pathological evidence of MEC. 　Results: Recurrence or regional lymph node metastasis were diagnosed in 6 of the 36 MEC patients, among which 4 were well differentiated and 2 were poorly differentiated, 1 was in stage Ⅰ to Ⅱ, and 5 were in the stage of Ⅲ or Ⅳ, there were 23 survivors. Thirteen of the 36 patients died, 4 of whom from MEC and 9 from reasons not related to MEC. All the died were in stage Ⅲ or Ⅳ. 　Conclusions: Recurrence or metastasis of MEC correlates with clinical-staging, but not related to the histopathological grading, this suggested that ablative surgery of the primary tumor and dissection of the regional lymphatic system are required in cases of Ⅲ and Ⅳstage MEC. Postoperative irradiation is proposed in the event of inadequate resection.

Objective To investigate the influence of fixation of both lower limbs with negative pressure vacuum cushion and fixation of both ankles with self-made foam mat on setup errors in radiotherapy for rectal cancer.Methods A total of 12 patients with rectal cancer were enrolled in 2014 and randomly divided into group A (using negative pressure vacuum cushion) and group B (using self-made foam mat).An offline registration analysis was performed for the images of 108 times (A,B group of 54 times) of kilovoltage cone-beam CT (CBCT) before and after treatment.Grey scale translation error registration was used,and the results of registration were analyzed.The setup errors in x-axis (left-right direction),y-axis (cranial-caudal direction),and z-axis (anterior-posterior direction) were compared between the two groups.Results There was no significant difference in the absolute setup error in the y-axis between the two groups (2.13±0.64 mm vs.2.61±1.17 mm,P=0.399),while group A showed significantly lower absolute setup errors in the x-axis and z-axis than group B (x-axis:1.51±0.28 mm vs.2.70±1.05 mm,P=0.039;with an error rate of 7.41％ vs.42.59％;z-axis:1.10±0.29 mm vs.2.37±0.71 mm,P=0.002;with an error rate of 1.85％ vs.35.19％).Conclusions In the radiotherapy positioning for rectal cancer,fixation of both lower limbs with negative pressure vacuum cushion effectively avoids the translation and rotation of both lower limbs,reduces absolute setup errors,and has higher accuracy than fixation of both ankles with self-made foam mat.

Objective To express human inducible eostimulator (ICOS) extracellular region and IgG Fc fusion protein, and analyze their function in allogenie lymphocyte proliferation in vitro and in vivo. Methods Human ICOS extraeellular region and IgG Fc fragment were cloned into a soluble expression vector. ICOS-Ig fusion protein was expressed and purified in CHO cells. To monitor primary MLR, Balb/c spleen T cells were isolated as responder cells, and irradiated C57BL/6 spleen cells as stimulator cells. 50 μg/ml ICOS-Ig or IgG was added to primary MLR cultures. The cells responsive rates were detected by 3 H-TdR methods. ELISA tested supernatants for eytokines (IL-2,IL-4, IL-10 and IFN-γ). T cells of each group in primary MLR were cultured as responder cells for secondary MLR, and irradiated C57BL/6 (donor) or C3H (third party) spleen cells as stimulator cells. Similar indexes were detected in secondary MLR. Then vital dye CFSE was used to study alloreactive T cell proliferation in vivo. CFSE-labeled C57BL/6 spleen cells were transferred to irradiated Balb/c mice. Mice were then intraperitoneally injected with 0. 2 mg IgG, ICOS-Ig or CsA each day.At the 3rd day after transfection, the spleen cells of the mice were harvested to detect CD4+ CFSE+ and CD8+ CFSE+ by FACS. Results In primary MLR, ICOS-Ig inhibited allogenic T-cell proliferation with inhibition rate being (58 ± 8)% in 50 μg/ml, and increased IFN-γ secretion. In secondary MLR, ICOS-Ig specifically inhibited the proliferation of donor spleen cells with inhibition rate being (42±8)%, and in ICOS-Ig group the levels of IL-4 and IL-10 were lower and the level of IFN-γ higher than in IgG group. However, ICOS-Ig didn't inhibit the proliferation of third-party spleen cells. In the CFSE dye assay, CFSE intensity of CD4+ and CD8+ T cells in ICOS-Ig and CsA groups was stronger than that in control group (P < 0. 05), while CFSE intensity in combined treatment group were even stronger than that in ICOS-Ig and CsA groups (P<0. 05). Conclusion ICOS-Ig could inhibit allo-reactive T cell proliferation in vitro and in vivo, and induce donor-specific T cell hyporesponsiveness specifically.

Objectives:The effects of pingyangmycin(PYM) in the treatment of cavernous hemangioma, strawberry hemangioma and mixed hemangioma in the oromaxillofacial and intraoral regions is evaluated.　Methods:450 cases of hemangioma in the oromaxillofacial regions from January 1993 to January 1999 were reviewed. PYM was injected into the cavity or in the circumference of the hemangioma, and the injection may be repeated every 7～10 days for 3～5 times.　Results:450 patients were followed-up for 6 months～6 years. 86.89% were cured and nearlly cured,and 12% were improved. The total efficiency rate was 98.86%. The cure and elementary cure rates of cavernous hemangioma, strawberry hemangioma and mixed hemangioma were 91.04%, 86.08% and 78.01%, respectively, but the elementary cure rate of the wine color stainscapillary hemangioma was 14.29% only.　Conclusions:This method may be a safe, simple and effective therapy for cavernous hemangioma, strawberry hemangioma and mixed hemangioma in the oromaxillofacial regions.

Objective To understand laboratory diagnosis and clinical characteristics of human immunodeficiency virus (HIV ) infection and AIDS patients in three comprehensive hospitals .Methods Laboratory diagnosis and clinical characteristics dates of people living with HIV/AIDS patients consulted in Chongqing Emergency Medical Center between 2007 to 2013 were retrospective‐ly analyzed .Results Totally 47 355 cases were carried HIV antibody screening during 7 years ,179 cases of HIV antibody were positive in preliminary screening ,171 cases were confirmed as positive .Among 5 cases of HIV antibodies result unconfirmed ,2 ca‐ses were followed up ,1 case was ruled out HIV infection ,1 case was converted to HIV antibody positive .People living with HIV al‐ways merging double or multiple infection with hepatitis b virus (HBV) ,hepatitis c virus (HCV) and treponema pallidum (TP) and so on .People living with HIV aged from 18 to 86 years old ,9 .36% was over 60 years old .Most patient has two or more clinical manifestations when consulted a doctor .Conclusion There were false‐positive of HIV antibody preliminary screening ,HIV anti‐body positive results must be confirmed by Western blot confirmatory test .Uncertainty of HIV antibody results should be judged by regularly follow‐up or combining with other detection methods ,epidemiological data .Routine HIV antibody screening should be adopt for HBV ,HCV and TP infection .Elder patients should not be ignored .Clinical specificity of HIV/AIDS is not strong ,it is need to be valued and identified from other cause similar symptoms of diseases caused by phase identification ,in order to reduce missed diagnosis and misdiagnosis .

Objective:To investigate the etiololgy and pathogenesis of cholesterol granuloma of the marillary sinus. Method:Five patients with cholesterol granuloma of the maxillary sinus were analysed retrospectively. Result: The cholesterol granuloma was a particular form of tissue reactions of granulation. The clinical symptoms of the disease was short of specificity. Conclusion; The pathogenesis of cholesterol granuloma includes hyperlipemia, obstruction of airfilled cavity ventilation and impaired drainage. The final diagnosis was based on pathologic examination. The treatment should begin with the intervention and treatment of hyperilpemia. Radical cure can be a-chieved by operation.

Objective To investigate the effect of combination of topiramate,sodium valproate and clonazepam on intractable epilepsy.Methods 157 Patients with intractable epilepsy were treated with clonazepam,sodium valproate and topiramate.They were followed up for 2 years.Results The total efficiency is 75.16% 6 months after treatment,which was steady in the latter time and reliable for various types of attack,with few side-effects.Conclusion Combination of topiramate,sodium valproate and clonazepam is effective and safe on intractable epilepsy.

Objective:To explore the effect of damage control surgery on polytraumatism with severe oral maxillo-facial trauma.Methods: We retrospectively analyzed 32 cases of polytraumatism with severe oral maxillo-facial trauma treated by damage control surgery.Results: The principles of damage control surgery were successfully applied to the treatment.Of the 32 cases,31 survived,with their polytraumatism sequentially managed,and only 1 died.Conclusion: Damage control surgery helps to raise the success rate in the treatment of polytraumatism with severe oral maxillo-facial trauma.