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1.
目的 后牙树脂充填后的边缘微渗漏问题是影响修复效果的关键因素之一,而黏结剂的边缘封闭性在其中起了关键的作用.文中对比了2种牙本质黏结剂用于后牙Ⅱ类洞树脂充填的边缘封闭性.方法 20个新鲜离体磨牙随机分为2组,在近远中邻面制备浅的Ⅱ类洞和深的Ⅱ类洞,A组用可乐丽菲露自酸蚀黏结剂,B组用Single bong NT全酸蚀黏结剂,2组均用可乐丽菲露前后牙通用型树脂充填,2%甲苯胺蓝染色,从充填体正中剖开牙齿,观察充填体边缘微渗漏情况.结果 2组牙浅洞洞壁均无微渗漏,深洞颌面侧壁无微渗漏,龈壁存在不同程度微渗漏,但2组无显著性差异(P>0.05).结论 自酸蚀黏结剂在牙颈部均存在牙本质黏结界面微渗漏,微渗漏程度较稳定,全酸蚀黏结剂虽可避免边缘微渗漏,但微渗漏程度差异较大,技术敏感性较高.  相似文献   

2.
目的单组份自酸蚀黏结剂是最新一代牙科黏结剂,操作简便。为研究其对牙本质和牙釉质的黏结性能,文中将S3BOND与ibond用于Ⅴ类洞树脂充填,对其边缘封闭性进行比较。方法 10颗新拔除的磨牙随机分为2组,在颊舌面分别制备Ⅴ类洞,龈壁位于釉牙本质界下方,A组用S3BOND自酸蚀黏结剂,B组用ibond自酸蚀黏结剂,2组均用维纳斯前后牙通用型纳米树脂充填,2%甲苯胺蓝染色,从充填体正中剖开牙齿,观察每个充填体龈壁和颌壁边缘微渗漏情况。结果2组龈壁存在不同程度微渗漏,差异有统计学意义(P<0.05),而颌壁间差异无统计学意义(P>0.05)。A组龈壁与颌壁染色的差异有统计学意义(P<0.05),B组龈壁与颌壁染色的差异无统计学意义(P>0.05)。结论自酸蚀黏结剂S3BOND在牙本质的边缘封闭性优于ibond,在牙釉质的边缘封闭性虽低于ibond,但差异不显著。  相似文献   

3.
目的不同黏结剂对牙面湿润度的要求各有差异,为了解牙面湿润度对牙本质黏结剂的影响,探求能达到最佳黏结效果的牙面湿润度,文中对2种黏结剂在3种不同牙面湿润度条件下的边缘密闭性进行研究。方法将30个新鲜体外磨牙随机分为6组(A、B、C、D、E、F组),在颊舌面牙颈部制备2mm×3mm V类洞,A、B、C 3组用C learfil SE BOND自酸蚀黏结剂,D、E、F组用ibond自酸蚀黏结剂黏结,A、D组牙面干燥时间为0 s,B、E组牙面干燥时间5 s,C、F组牙面干燥时间10 s,均用3MZ350树脂充填,2%甲苯胺蓝染色,从充填体正中剖开牙齿,观察充填体颌壁和龈壁边缘微渗漏情况。结果 A、B、C 3组边缘微渗漏的差异有统计学意义(P<0.05);D、E、F组边缘微渗漏差异无统计学意义(P>0.05);A、D组之间和B、E组之间的差异有统计学意义(P<0.05);C、F组之间差异无统计学意义(P<0.05)。结论在牙面湿润的情况下,颌壁和龈壁ibond黏结剂的黏结性均好于C learfil SE BOND黏结剂,在牙面干燥的情况下,龈壁两者比较差异无统计学意义(P<0.05),颌壁C learfil SE BO...  相似文献   

4.
三种黏接材料的体外微渗漏研究   总被引:1,自引:0,他引:1  
目的比较自酸蚀、全酸蚀黏接剂和玻璃离子水门汀在Ⅱ类洞充填修复中的边缘微渗漏。方法30颗离体上颌前磨牙随机分为三组(n=10),均于近中或远中面制备长方体型Ⅱ类洞型(4.0 mm×3.5 mm×2.5 mm),分别选用自酸蚀黏接剂 纳米树脂(自酸蚀组)、全酸蚀黏接剂 纳米树脂(全酸蚀组)和玻璃离子水门汀(玻璃离子组)进行充填修复。经200次和500次冷热循环后行0.5%碱性品红染色,体视显微镜下观测各充填修复体轴壁和龈壁的微渗漏,并进行统计学分析。结果组间比较显示,自酸蚀组微渗漏深度显著大于全酸蚀组和玻璃离子组(P<0.01)。组内比较显示,龈壁微渗漏深度显著大于轴壁(P<0.01);与冷热循环200次相比,冷热循环500次时各组轴壁和龈壁的微渗漏深度均明显增加(P<0.01)。结论在Ⅱ类洞充填修复中,自酸蚀、全酸蚀黏接剂黏接修复及玻璃离子水门汀均存在边缘微渗漏,而以自酸蚀黏接剂黏接修复及修复体龈壁的微渗漏较为明显,其程度随冷热循环次数而增加。  相似文献   

5.
目的 比较自酸蚀、全酸蚀黏接剂和玻璃离子水门汀在Ⅱ类洞充填修复中的边缘微渗漏.方法 30颗离体上颌前磨牙随机分为三组(n=10),均于近中或远中面制备长方体型Ⅱ类洞型(4.0 mm×3.5 mm×2.5 mm),分别选用自酸蚀黏接剂+纳米树脂(自酸蚀组)、全酸蚀黏接剂+纳米树脂(全酸蚀组)和玻璃离子水门汀(玻璃离子组)进行充填修复.经200次和500次冷热循环后行0.5%碱性品红染色,体视显微镜下观测各充填修复体轴壁和龈壁的微渗漏,并进行统计学分析.结果 组间比较显示,自酸蚀组微渗漏深度显著大于全酸蚀组和玻璃离子组(P<0.01).组内比较显示,龈壁微渗漏深度显著大于轴壁(P<0.01);与冷热循环200次相比,冷热循环500次时各组轴壁和龈壁的微渗漏深度均明显增加(P<0.01).结论 在Ⅱ类洞充填修复中,自酸蚀、全酸蚀黏接剂黏接修复及玻璃离子水门汀均存在边缘微渗漏,而以自酸蚀黏接剂黏接修复及修复体龈壁的微渗漏较为明显,其程度随冷热循环次数而增加.  相似文献   

6.
目的对比3M第五代全酸蚀Single Bond、第五代自酸蚀可乐丽菲露Cleafil及3M第七代易邦德粘Easyone的粘接强度,评价其粘接效果,为临床应用提供参考。方法选择120颗正畸减数拔除的离体前磨牙,随机分为4组:3M第五代全酸蚀Single Bond组(A组),第五代自酸蚀可乐丽菲露Cleafil组(B组),3M第七代易邦德粘Easyone组(C组),选择性酸蚀+第五代自酸蚀可乐丽菲露Cleafil组(D组)。用电子万能测力机测定剪切力并进行对比分析,采用单因素方差分析进行组间差异比较。结果 A、B、C、D组的抗剪切粘结强度分别为(5.56±1.48)、(3.60±1.23)、(2.40±0.99)、(3.76±1.18)Mpa。A组粘接强度最高,C组粘接强度最弱,B组与D组粘接强度介于两者之间,差异有统计学意义(P<0.05)。结论 3M第五代全酸蚀Single Bond组粘接强度最高,在临床中对固位力要求较高的可选用。对于深层牙本质的粘接尽量选用第五代自酸蚀可乐丽菲露Cleafil SE-Bond及3M第七代易邦德粘Easyone。  相似文献   

7.
四种黏结剂对牙釉质和牙本质微拉伸黏结强度的比较   总被引:2,自引:0,他引:2  
目的 用微拉伸黏结强度检测法评价四种黏结剂与正常牙釉质和牙本质的黏结强度。方法 选择40颗正畸治疗拔除的健康前磨牙,随机均分为8组,每组10颗牙齿。分别与4种黏结剂:两种自酸蚀黏结剂(A:AdperPrompt、B:XenoⅢ)和两种全酸蚀黏结剂(C:SingleBond2、D:Prime&Bond:NT)黏结。实验分组:牙釉质组AE、BE、CE、DE和牙本质组AD、BD、CD、DD。每组各与一种黏结剂分别按厂商说明书要求用于暴露的牙釉质或牙本质的表面上,再用蓝色复合树脂修复要求高度。每个牙齿片切2条横截面积为1.5mm^2的长方体状样本,用电子万能实验机测试其黏结强度,加载速度为1mm/min。统计学分析微拉伸黏结强度测试值。结果 4种黏结剂的微拉伸黏结强度,牙釉质组各组之间黏结强度差异有统计学意义(P〈0.05)。SNK两两比较结果BE组与DE组差异有统计学意义(P〈0.05),其余各组差异无统计学意义(P〉0.05);牙本质组各组之间差异无统计学意义(P〉0.05)。结论 四种黏结剂与正常牙釉质的黏结存在差异,自酸蚀黏结射XenoⅢ黏结强度最高;对牙本质自酸蚀黏结剂和全酸蚀黏结剂黏结强度相接近。  相似文献   

8.
自蚀粘接剂对复合树脂微渗漏的影响   总被引:4,自引:0,他引:4  
目的:实验研究自蚀粘接剂、混合型复合树脂和流动树脂对微渗漏的影响.方法:40颗人类离体磨牙,根据颊侧(A)、近中侧(B)和远中侧(C)分成三大组.在釉牙骨质交界处制备成约3×2×2 mm V类洞洞型.分别用自蚀粘接剂、混合型复合树脂和流动树脂修复V类洞.所有牙齿着色后,在立体显微镜下观察微渗漏情况.结果:微渗漏在壁处各组间差异无显著性(P>0.05),而在龈壁处流动树脂(C组)较混合型复合树脂存在较大的微渗漏(P<0.05).洞缘斜面组与无洞缘斜面组的微渗漏等级差异无显著性(P>0.05).结论:自蚀粘接剂未能显著减少复合树脂的微渗漏.在修复V类洞时,流动树脂较混合型树复合微渗漏大.  相似文献   

9.
自蚀粘剂接对复合树脂微渗漏的影响   总被引:3,自引:0,他引:3  
目的实验研究自蚀粘接剂、混合型复合树脂和流动树脂对微渗漏的影响.方法40颗人类离体磨牙,根据颊侧(A)、近中侧(B)和远中侧(C)分成三大组.在釉牙骨质交界处制备成约3×2×2 mm V类洞洞型.分别用自蚀粘接剂、混合型复合树脂和流动树脂修复V类洞.所有牙齿着色后,在立体显微镜下观察微渗漏情况.结果微渗漏在壁处各组间差异无显著性(P>0.05),而在龈壁处流动树脂(C组)较混合型复合树脂存在较大的微渗漏(P<0.05).洞缘斜面组与无洞缘斜面组的微渗漏等级差异无显著性(P>0.05).结论自蚀粘接剂未能显著减少复合树脂的微渗漏.在修复V类洞时,流动树脂较混合型树复合微渗漏大.  相似文献   

10.
目的比较自酸蚀和磷酸酸蚀两种粘接系统修复楔状缺损的临床疗效。方法选取22例在我院门诊口腔科就诊的患者共146颗患牙,随机分成试验组和对照组,试验组使用可乐丽菲露SE BOND和可乐丽菲露AP-X复合树脂充填患牙;对照组使用登士柏磷酸酸蚀粘接剂和登士柏复合树脂充填。充填后3,6,12,18个月进行复查和临床评价,根据Ryge G的改良USPHS评分系统进行评价。结果治疗18个月后,可乐丽菲露树脂及登士柏树脂充填体脱落率分别为7%,13%,差异无统计学意义。两种树脂均无继发龋,边缘着色、解剖形态、表面光滑度差异无统计学意义。颜色匹配、牙齿敏感方面可乐丽菲露优于登士柏。结论充填牙颈部楔状缺损自酸蚀粘接系统的树脂略优于磷酸酸蚀粘接系统的树脂。  相似文献   

11.
Objective To observe blood pressure change with age in salt-sensitive teenagers whose salt sensitivity were determined by repeated testing.Methods Salt sensitivity was determined through intravenous infusion of normal saline combined with volume-depletion by oral diuretic furosemide in 55 teenagers. After five years, salt sensitivity was re-examined and subject blood pressure was followed up. Blood pressure changes in salt-sensitive teenagers were compared to that of non-salt sensitive teenagers over five years.Results After 5 years, the repetition rate of salt sensitivity determined by intravenous saline loading is 92.7%. In teenagers with salt sensitivity on the baseline, both the systolic blood pressure increments and increment rates were much higher than non-salt sensitive teenagers (12.7±12.1 mmHg vs. 2.8±5.2 mmHg, P< 0.01; 12.2%± 12.0% vs. 2.5% ±4.4%, P< 0.001,respectively). There was a similar trend for diastolic blood pressure (8.4 ± 6.4 mmHg vs. 3.7 ± 6.4 mmHg, P = 0.052; 13.2% ±10.6 % vs. 6.8%± 10.1%, P = 0.053, respectively).Conclusions Salt sensitivity determined by intravenous saline loading showed good reproducibility. Blood pressure increments with age were much higher in salt-sensitive teenagers than non-salt sensitive teenagers, especially in terms of systolic blood pressure.  相似文献   

12.
Objective: To evaluatel the value of D-dimers in patients with acute aortic dissection (AAD). Methods: This study consisted of 16 patients with AAD and 27 non-AAD patients. Serum D-dimets were measured by Sta-Liatest D-DI immunoturbidimetric assay. Results: D-dimer level was higher (P < 0.001) in patients with AAD(7.91 ± 5.52 μg/ml) than that in non- AAD group(1.57±1.24 μg/ml). D-dimer was positive (>0.4 μg/ml) in all patients with AAD and in 10 control group patients (37%). Among patients with acute AAD, D-dimers tended to be higher in Stanford A than in Stanford B (8.67 ± 4.31 μg/ml vs. 3.24±1.27 μg/ml, P <0.01). D-dimer values tended to be higher in more extended disease(3.84 ± 1.65 μg/ml, 8.57 ± 3.58 μg/ml and 11.87 ± 5.69 μg/ml in thoracic aorta, thoracic and abdominal aorta, thoracic and abdominal aorta and iliacal arteries, respectively, P < 0.05 for both 8.57 ± 3.58 and 11.87 ± 5.69 vs. 3.84 ± 1.65 ). Including the control group into the analysis, we found a sensitivity of 100%, a negative predictive value of 100%, and a specificity of 66% and a positive predictive value of 64% for D-dimer in diagnosis of AAD in our patients with suspected AAD. Conclusion: D-dimer was elevated in patients with AAD. A negative D-dimer test result could be useful in excluding AAD.  相似文献   

13.
Objective: To set up a simple and reliable rat model of combined liver-kidney transplantation. Methods: SD rats served as both donors and recipients. 4℃ sodium lactate Ringer's was infused from portal veins to donated livers,and from abdominal aorta to donated kidneys, respectively. Anastomosis of the portal vein and the inferior vena cava (IVC) inferior to the right kidney between the graft and the recipient was performed by a double cuff method, then the superior hepatic vena cava with suture. A patch of donated renal artery was anastomosed to the recipient abdominal aorta. The urethra and bile duct were reconstructed with a simple inside bracket. Results: Among 65 cases of combined liver-kidney transplantation, the success rate in the late 40 cases was 77.5%. The function of the grafted liver and kidney remained normal. Conclusion: This rat model of combined liver-kidney transplantation can be established in common laboratory conditions with high success rate and meet the needs of renal transplantation experiment.  相似文献   

14.
Increasing maternal age is the only etiological factor unequivocally linked to Down's syndrome in humans. The occurrence rate of newborns with Down's syndrome is about 1/220 in women over 35 years old. However, the occurrence rate in embryos fertilized in vitro, of the elder woman is unclear. Using FISH we screened the number of chromosome 21 in preimplanted embryos of 5 elderly women (average age, 38.4 years) to study the feasibility and necessity of screening trisomy 21 in embryos in patients over 35 years old at the in vitro fertilization (IVF) center.  相似文献   

15.
Real-time three-dimensional echocardiography (RT3DE)is a new ultrasound technique that enables dynamic threedimensional visualization and quantification of the heart in real time. Investigation of feasibility and methodology of RT3DE in determining left ventricular (LV) and right ventricular (RV) volumes, RT3DE was performed in 35 normal adults using Philips SONOS 7500 system with a 2-4 MHz matrix array transducer. The 60°×60° "pyramid" volume database was obtained and analyzed on a TomTec echo workstation. Both LV and RV volumes were calculated with four 3DE methods (i.e. apical 2, 4, 8, and 16-plane) through manually tracing ventricular endocardial borders in end diastole and end systole. Stroke volumes were then calculated. LV volume was also measured by 2DE Simpson's rule using GE VIVID 7 ultrasound machine.  相似文献   

16.
A clinical guideline for the therapeutic interventions of integrative medicine may be defined as a written document which states a series of recommendations on therapeutic interventions of integrative medicine for a special disease or condition. The guideline may provide assistance to medical professionals in making clinical decisions aimed at improving the clinical outcome of patients and reducing the costs of medical care(~'4~. Recommendations issued by a guideline should be based on the best available evidence in both Western and Chinese medicine. For fulfilling this purpose, the development of clinical guidelines for therapeutic interventions in the field of integrative medicine should follow scientific principles and undergo a rigorous processes.  相似文献   

17.
Objective:To probe into the influence of changes of ovarian hormones on the pathogenesis of the specific sub-type premenstrual syndrome(PMS)and reveal partial microcosmic mechanisms of adverse flow of liver-qi.Methods:Estradiol(E2)and progesterone(P)levels in serum were determined at different phases of menstrual cycle by radioimmunoassay.Results:In the group of PMS with adverse flow of liver-qi.the secretive peak value Of E2 and P at the follicular phase significantly decreased,and the secretive peak value at the luteal phase did not come into being.Conclusions:Low E2 and P secretive peak at the follicular phase and absence of secretive peak at the luteal phase is one of the microcosmic mechanisms of PMS with adverse flow of liver-qi.One of the pathophysiologic mechanisms of specific sub-type PMS is probably the continuous low level of E2and P.  相似文献   

18.
Journal of Nanjing Medical University (English Edition) JNMU, sponsored by Nanjing Medical University, was established in 1987. It is a bimonthly comprehensive English medical journal published locally and abroad.Since 2007, Journal of Nanjing Medical University (English Edition )was granted Elsevier the full publishing and distribution rights worldwide for the Electronic Edition, excluding the People's Republic of China.  相似文献   

19.
Objective To measure Derpl and Blot5 allergen levels in asthmatics' homes in Hongkong.Methods Seventy houses were enrolled for a mite indoor environment study. Dust samples were obtained from two sites of each patients' house: bed and floor. Derpl and Blot5 levels were quantified by a two-site monoclonal antibody-based ELISA technique.Results The levels of Derpl allergens found in bed (geometric mean (GM) 3.43 μg/g of dust; 95%CI, 1.89-4.96 μg/g)and on the floor (GM 1.12 μg/g of dust; 95%CI, 0.71-1.53 μg/g) indicated significant differences (P=0.005). However, the levels of Blot5 allergens found in bed (GM 19.00 μg/g of dust; 95%CI, 0.89-38.90 μg/g) and on the floor (GM 6.14 μg/g of dust; 95%CI, 0.40-11.90 μg/g) showed no statistically significant difference. In addition, in regards to the exposure index for Derpl and Blot5 allergens found in bed and on the floor, 17.6% in bed and 8.6% on the floor had levels of Blot5 ≥ 10 μg/g of dust, higher than those obtained for Derp1 (7.2% and 0% in bed and on the floor respectively, P< 0.05); higher percentages in bed and on the floor (25.0% and 35.7%) were observed for levels of Blot5 =0 μg/g of dust as compared with Derpl in bed and on the floor (4.3% and 14.5% respectively, P< 0.05).Conclusions Derpl and Blot5 are the major allergens found in this regional study, Blot5 is a more potent allergen in Hongkong, probably reflecting the high level of exposure to Blomia tropicalis (Bt). Bt and Dermatophagoides pteronyssinus (Dp) allergens should be included for precise diagnosis and effective immuno-therapeutic treatment of mite allergy in Hongkong.  相似文献   

20.
ANTI-PROLIFERATION EFFECT OF ORIDONIN ON HL-60 CELLS AND ITS MECHANISM   总被引:4,自引:0,他引:4  
Objcetive To investigate the anti-proliferation effect of oridonin on leukemic HL-60 cells and its mechanism. Methods HL-60 cells in vitro in culture medium were given different concentrations of oridonin. The inhibitory rate of cells were measured by microculture tetrazolium (MTT) assay, cell apoptotic rate was detected by flow cytometry (FCM), morphology of cell apoptosis was observed by hoechst 33258 fluorescence staining, and the activity of telomerase was detected using telomere repeat amplification protocol (TRAP) PCR-ELISA before and after apoptosis occurred. Results Oridonin could decrease telomerase activity, inhibit growth of HL-60 cells, and cause apoptosis significantly. The suppression was both in time- and dose-dependent manner. Marked morphological changes of cell apoptosis including condensation of chromatin and nuclear fragmentation were observed clearly by hoechst 33258 fluorescence staining especially after cells were treated 48-60 hours by oridonin. Conclusions Oridonin has apparent anti-proliferation and apoptotic effects on HL-60 cells in vitro, decreasing telomerase activity of HL-60 cells may be one of its most important mechanisms. These results will provide strong laboratory evidence of oridonin for clinical treatment of acute leukemia.  相似文献   

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