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《中山大学学报(医学科学版)》2016,37(5)
【Objective】 To evaluate the bond strength of four different temporary crown cements with CAD/CAM standard testing model. 【Methods】 Four groups of standard testing resin model(including preparation and temporary crown with retention hole) of maxillary incisor with different cements (Zinc oxide, Glass ionomer, Plasma zinc phosphate, TempoCemNE) were prepared according an extracted tooth with an periodontal disease, each group had ten specimens. The bond strength of all the specimens was tested and recorded at a speed of 1mm/min with MTS. 【Results】 The mean bond strength were(37.48 ± 4.92) N, (52.13 ± 9.28) N, (36.16 ± 6.13) N, (46.21 ± 6.70) N in the groups of Zinc oxide, Glass ionomer, Plasma zinc phosphate, TempoCemNE; While the bond strength in the groups of Glass ionomer and TempoCemNE was significantly higher than that in the groups of Zinc oxide and Plasma zinc phosphate(P < 0.05). 【Conclusions】 According the result of the bond strength of four different temporary crown cements with CAD/CAM standard testing model, the bonding effect of the temporary crowns cements with Glass ionomer and Tempo Cem NEis better and worth wide application in the clinical practice. 相似文献
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摘 要: 【目的】 评价生物素化CD45单抗介导的99mTc-生物素在人Raji细胞移植瘤裸鼠模型中三步法预定位放免显像的价值。【方法】 CD45单抗及DTPA-生物素的99mTc标记采用直接标记法。取人Raji细胞移植瘤裸鼠18只,随机分为2组,每组9只。实验组为三步法预定位放免显像组,静注生物素化CD45单抗100 μg,48 h后静注亲和素200 μg,再过48 h静注99mTc-生物素7.4 MBq(20 μg);对照组为99mTc-CD45单抗放免显像组,静注99mTc-CD45单抗100 μg。上述两组裸鼠分别于注药后3、6、12 h分别进行SPECT显像,每个时间点各取3只裸鼠断颈处死后,取脏器组织及肿瘤,称重后在γ计数仪中测量放射性计数,经放射性衰变校正后计算各脏器的%ID/g及肿瘤/非肿瘤(T/NT)比值。【结果】平均每分子CD45单抗约结合12分子生物素,CD45单抗及DTPA-生物素的99mTc标记率分别>70%和>80%。三步法给药后荷瘤裸鼠SPECT显像及生物分布示:整个显像期间血池内放射性均较低,肝脾见较多放射性浓聚;注射标记物后3-6h,肿瘤显影清晰,并持续到12 h;注药后3、6和12 h肿瘤的%ID/g分别为1.73 ± 0.22、1.24 ± 0.03和0.94 ± 0.07;肿瘤/血液比值分别为3.5、4.9和7.8;肿瘤/肌肉比值分别为8.2、8.9和10.4。而静注99mTc-CD45单抗后则可见肝脾及肾脏明显放射性聚集,12h血池内见较多放射性分布,肿瘤部位见有少量放射性集聚,12 h肿瘤的%ID/g为0.89 ± 0.13,肿瘤/血液及肿瘤/肌肉的比值分别为1.6和2.5。【结论】与99mTc-CD45单抗相比较,99mTc-生物素三步法预定位放免显像明显改善肿瘤T/NT比值,标记物注射后3 h即可使肿瘤显影。 相似文献
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目的 观察注射用丹参多酚酸盐联合培美曲塞及卡铂方案治疗老年人晚期非鳞非小细胞肺癌的效果和安全性。方法 经组织病理学或细胞学证实初治老年晚期非鳞非小细胞肺癌患者58例,通过区组随机化法分为对照组和观察组各29例。对照组给予培美曲塞+卡铂方案化疗,观察组在对照组治疗基础上给予注射用丹参多酚酸盐200 mg/次,1次/d,静脉滴注,连用14 d。21 d为1个周期,4个周期后比较两组近期疗效、生活质量、不良反应发生及凝血指标改善情况。结果 观察组和对照组总有效率分别为44.8 %(13/29)、37.9 %(11/29),疾病控制率分别为86.2 %(25/29)、75.8 %(22/29), 两组近期疗效比较差异无统计学意义(P>0.05),观察组生活质量总改善率优于对照组[82.7 %(24/29)比65.5 %(19/29)](P<0.05),血液学毒性和消化道反应发生率低于对照组(P<0.05),且观察组血液高凝状态改善情况优于对照组(P<0.05)。结论 注射用丹参多酚酸盐联合培美曲塞、卡铂方案治疗老年人晚期非鳞非小细胞肺癌可降低化疗引起的不良反应,提高患者生活质量,改善肺癌患者的血液高凝状态,从而预防血栓栓塞性并发症的发生。 相似文献
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目的:分析小儿外科疾病早期未能明确诊断而产生误诊原因和减少误诊的方法。方法对61例被误诊的急性阑尾炎、阑尾脓肿、肠套叠、梅克尔憩室、先天性肥厚性幽门狭窄、腹股沟斜疝嵌顿患儿误诊情况和误诊原因进行分析。结果误诊的急性阑尾炎、阑尾脓肿、肠套叠、梅克尔憩室、先天性肥厚性幽门狭窄、腹股沟斜疝嵌顿转入儿外科经手术或非手术治疗证实。结论患儿病史不典型,查体不合作,表达能力差,相关体征不明显是误诊的主要原因。儿科医生要充分认识小儿外科系统疾病的临床特点,要有科学的临床思维方法,熟练掌握小儿查体的技巧,及时完善相关B超、X线摄片及CT检查,及时完善相关科室会诊是减少误诊的主要方法。 相似文献
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《中山大学学报(医学科学版)》2013,34(4)
【Objective】 To observe the changes of CD4+CD25+ regulatory T cells in the patients with allergic rhinitis after subcutaneous specific immunotherapy, and to investigate the long-term efficacy and mechanism of subcutaneous specific immunotherapy. 【Methods】 A total of 90 patients with allergic rhinitis were randomly allocated to receive either specific immunotherapy (SIT group, n = 45) or medical treatment (Control group, n = 45). Symptom scores, medication scores, and Rhinoconjunctivitis Quality of Life Questionnaire were assessed to evaluate the clinical efficacy. CD4+ CD25+ regulatory T cells were detected by flow cytometry (FCM). 【Results】 There was a significant difference in medication scores and no significant difference in symptom scores between the two groups after treatment. The patients in SIT group had lower intake of medication. The SIT group also had a significant improvement in the Rhinoconjunctivitis Quality of Life Questionnaire. CD4+ CD25+ regulatory T cells had a lower proportion in the patients with allergic rhinitis than in the healthy people. The proportion of CD4+CD25+ regulatory T cells had a significant improvement in the SIT group while it had no significant difference in the Control group at 3 years after treatment. 【Conclusion】 At 3 years after the specific immunotherapy, the patients with allergic rhinitis had lower intake of medication and a significant improvement in symptom and quality of life. It might be related to the influence of the function of the CD4+CD25+ regulatory T cells. 相似文献
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摘要: 【目的】 对2例婚后妻子连续2次流产伴21号染色体结构改变病例进行多探针荧光原位杂交(FISH),探讨FISH技术在临床诊断微小区域染色体结构异常的应用价值。【方法】通过染色体常规G 显带技术初步确定染色体结构异常类型及染色体断裂的区带位置,然后挑选位于21号染色体长臂位点特异性BAC克隆,缺口平移法将其标记为探针,与21号染色体长臂末端的商品化探针混合,进行三色FISH。【结果】FISH结果排除了涉及其它染色体结构异常的可能,确定这2例均为21号染色体长臂微小区段的臂内倒位,这是首次关于21号染色体臂内倒位导致自发流产病例的报道。【结论】21号染色体臂内倒位与自然流产相关;多色FISH 技术在诊断和确定微小区域染色体结构异常中有非常重要的作用和应用价值。 相似文献
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《中山大学学报(医学科学版)》2014,35(1)
Abstract:【Objective】 To analyze chromosomal structural changes in two cases, whose wives had recurrent spontaneous abortions; to study the application of FISH in clinical diagnosis of chromosome microstructure abnormality. 【Methods】 Chromosome Gbanding?karyotype analysis was performed to initially identify the structural aberrations. The BAC clones, which are located in chromosome 21 qarm, were labeled with nick translation kit. Triple FISH was conducted with commercial probes and BAC clone probes.【Results】 FISH images excluded the possibility of interchromosomal exchanges between chromosomes 21 and other chromosomes, and identified that the two cases were short inversions in the qarms of chromosomes 21. It was the first case report of chromosome 21 paracentric inversion leading to abortions. 【Conclusions】 Chromosome 21 paracentric inversion is related to spontaneous abortions. Multiple FISH technology is important and valuable in identification and diagnosis of chromosome microstructure abnormality. 相似文献
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目的 探讨预后好的早期霍奇金淋巴瘤(HL)的治疗方法,分析其预后因素.方法 对137例预后好的早期HL进行回顾性分析,其中84例(61.3%)接受单纯放疗,53例(38.7%)接受联合放化疗.研究指标包括近期疗效,5年、10年总生存(OS)率,无瘤生存(DFS)率,复发和死亡原因.结果 单纯放疗组和联合化放组的完全缓解(CR)率分别为71.4%和86.8%(x2=4.381,P=0.036),5年、10年OS率分别为84.4%、78.2%和81.1%、81.1%(P=0.556),5年、10年DFS率分别为85.4%、66.7%和94.1%、94.1%(P=0.047).全组22例复发,中位复发时间为16.5个月;23例(16.8%)死亡,其中9例(39.1%)死于HL.结论与单纯放疗相比,联合化放疗能提高预后好的早期HL的CR率和DFS率,但不提高OS率. 相似文献
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【目的】 探讨肾部分切除术后急性肾损伤指标早期监测效能。【方法】76例肾癌患者在我院接受肾部分切除术,术后根据急性肾损伤诊断标准将患者分为两组:急性肾损伤组和非急性肾损伤组,采用受试者工作特征曲线评价急性肾损伤生化指标判断急性肾损伤的效能。【结果】 24例(31.6%)患者术后发生急性肾损伤,其余52例(68.4%)患者术后未发生肾损伤,肾损伤组患者术中肾血管阻断的时间(min)较非肾损伤组长(30 ± 19 vs 24 ± 9, P = 0.03),肾损伤组有5例(20%)患者术中接受输血而非肾损伤组仅有8例(15%)患者接受输血(P = 0.011),肾损伤组患者住院时间较非肾损伤组患者长(P = 0.017)。术后24 h和48 h血清胱抑素C水平具有良好预测急性肾损伤效能,其AUC分别为0.790 [95%CI 0.688 ~ 0.893, P = 0.000 )和0.754 (95% CI 0.646 ~ 0.863, P = 0.000)。多元回归分析发现术后急性肾损伤危险因素包括输血 (P = 0.028)和术后24 h血清胱抑素C浓度(P = 0.018)。【结论】术后血清胱抑素C可能是肾部分切除术后急性肾损伤早期监测指标,输血和术后血清胱抑素C浓度可能是术后急性肾损伤独立危险因素。 相似文献