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1.
目的 研究崩瓷树脂修复中,三种不同金属处理剂对金属与复合树脂间剪切粘接强度的影响。方法 40个Ni-Cr合金试件随机分4组。模拟口内喷砂后,除对照组外,其他试件分别采用couplingsilane、alloyprimer、metalphot0primer三种不同金属处理剂对金属表面处理,然后所有试件使用VocoCLmara崩瓷修复系统粘接修复,经37℃恒温水浴24小时后,测定金属试件与复合树脂之间剪切粘接强度,进行统计分析。结果 三种金属处理剂组所获得的Ni-Cr合金与复合树脂间剪切粘接强度值显著高于对照组(P〈0.05);metalphotoprimer组与alloyprimer组所获得的Ni-Cr合金与复合树脂间剪切粘接强度值显著高于couplingsilane组(P〈0.05);但metalphotoprimer组与alloy primer组之间无统计差异(P〉0.05)。20倍OPTON体视显饭镜下观察到金属与复合树脂的剪切断面均位于金属一复合树脂粘接界面,未发生复合树脂内聚断裂。结论 couplingsilane、alloyprimermetalphotoprimer三种金属处理剂可以显著提高金属-复合树脂间粘接强度。  相似文献   

2.
热冷循环对托槽抗剪切强度影响的研究   总被引:2,自引:0,他引:2  
目的 比较冷热循环前后两种粘接剂抗剪切粘接强度,从而研究冷热循环实验对粘接剂抗剪切强度的影响。方法 90颗因正畸需要而拔除的人类前磨牙按照粘接剂(超强粘接剂和京津釉质粘合剂)和储存条件(室温蒸馏水中、37℃人工唾液中、冷热循环实验)的不同随机均分为6组,粘接金属方丝弓托槽,测定并记录抗剪切粘接强度和牙面残留粘接剂指数。结果 方差分析显示两种粘接剂粘接强度无明显差剐,但冷热循环后粘接强度均明显降低(P〈0.01);牙面残留粘接剂指数无明显差别。结论 冷热循环实验可明显降低托槽抗剪切粘接强度,体外粘接强度研究应进行冷热循环实验。  相似文献   

3.
目的通过对自制镍铬钛(Ni-Cr-Ti)烤瓷合金与Vita常用瓷的剪切结合强度的测试,探讨镍铬烤瓷合金添加钛、混合稀土金属以及不含铍(Be)对金瓷结合性能的影响。方法使用中国科学院金属研究所研制的镍铬钛烤瓷合金,共分3个试验组,各组成分略有差异,以HI BOND非贵金属烤瓷合金为对照组,所有试件在万能试验机上采用剪切力试验测试金瓷分离时的载荷。结果3个实验组剪切强度值依次为R1组(28.1864±2.80702)MPa,R2组(26.1585±3.38148)MPa,R3组(25.1663±3.12508)MPa,对照组为(29.1436±3.28302)MPa。通过单向方差分析和SNK检验,各组之间差异均无显著性意义(P〉0.05)。结论自制镍铬钛烤瓷合金的金瓷结合良好,剪切结合强度可以达到临床应用的要求。  相似文献   

4.
氧化锆陶瓷与三种树脂粘接剂粘接剪切强度比较   总被引:2,自引:0,他引:2  
目的探讨适合牙科氧化锆陶瓷的粘接材料。方法将烧结后的氧化锆陶瓷片分为3组,每组32片,分别采用三种自酸蚀粘接剂RelyX Unicem、PanaviaTM F、Superbond C﹠B与喷砂后的氧化锆陶瓷片粘接,水浴24h和水浴30d后,测试其粘接剪切强度。数据用SAS9.12软件进行统计学分析,粘接断面用扫描电镜观察。结果 PanaviaTMF树脂粘接材料粘接强度最好,分别为(31.36±3.49)MPa(水浴24h)、(29.52±3.44)MPa(水浴30d)。Superbond C﹠B能够取得较好的初期粘接强度(31.85±3.61)MPa(水浴24h),但水浴30d后明显下降至(21.32±2.58)MPa,P〈0.05。RelyX Unicem的初期(水浴24h)粘接强度最小为(13.29±3.05)MPa,P〈0.0001,但水浴30d后粘接强度为(12.06±2.28)MPa,未见明显降低,P(0.05。结论含有MDP磷酸单体的树脂粘接材料可以使牙科氧化锆陶瓷获得最好的粘接效果。使用不含无机填料的化学固化型纯树脂粘接剂可以取得较好的初期粘接强度但长期效果欠佳。一步法自酸蚀树脂粘接剂虽然没有很高的初期粘接强度,但粘接效果尚能持久。  相似文献   

5.
目的研究2种金属表面处理剂对铸造纯钛试件与树脂黏固剂粘接强度的影响。方法用牙科铸钛的方法制作直径分别为4 mm和5 mm的钛棒,并切割成长度为3 mm的小钛片。将2种规格的钛片配对,粘接面用碳化硅砂纸在流水下打磨抛光,使之呈均匀一致的平面,50 μm Al2O3喷砂。试件随机分成3组进行表面处理:第1组不使用金属表面处理剂,第2组使用Alloy Primer进行表面处理,第3组使用V-Primer进行表面处理。然后每组再分为3个小组,分别使用Super-Bond C&B、Panavia F、Rely X Unicem 3种黏固剂粘接。黏固剂固化1 h后,经37 ℃恒温水浴24 h以及5 000次冷热循环后,测试粘接强度,并观察铸造纯钛的表面形态和粘接面的破坏形式。结果AlloyPrimer、Super-Bond C&B的配伍组合与铸造纯钛获得的粘接强度在冷热循环前、后分别为(31.23±4.86)、(34.08±3.36)MPa,高于其他表面处理剂与树脂黏固剂配伍组合获得的粘接强度(P<0.05)。结论金属表面处理剂和树脂黏固剂的组合不同会导致粘接强度不同,经Alloy Primer处理的铸造纯钛试件与Super-Bond C&B的粘接强度最高。  相似文献   

6.

Purpose

This study investigated the influence of an interaction between sulfur-containing monomers and other monomers in multipurpose primers on the bond durability of a tri-n-butylborane (TBB)-initiated acrylic resin to a gold alloy.

Methods

The disk-shaped adherend materials were prepared from a gold alloy (Casting Gold M.C. Type IV). Two multipurpose-primers (Universal Primer, Monobond Plus), four metal primers containing an organic sulfur compound (M.L. Primer, Alloy Primer, Metaltite, and V-Primer), and three acidic primers (Estenia Opaque Primer, Acryl Bond, and Super-Bond Liquid) were used. The shear bond strengths were determined pre- and post-thermocycling to evaluate the bond durability. A statistical analysis of the results was performed using a non-parametric procedure, and the cohesive failure ratios of the debonded surfaces were compared.

Results

Among the pre-thermocycling groups, M.L. Primer, Metaltite, Monobond Plus, Universal Primer, and Alloy Primer showed the greatest bond strengths. Among the post-thermocycling groups, M.L. Primer, Metaltite, Monobond Plus, and Universal Primer showed the greatest bond strengths, whereas Acryl Bond, Super-Bond Liquid, Estenia Opaque Primer, and the unprimed control showed the lowest. Similarly, the primers that did not contain either a sulfur compound showed an obvious reduction in the cohesive failure ratio.

Conclusions

Multi-purpose primers containing a sulfur-containing monomer increased the bond strength of a TBB-initiated acrylic resin to a gold alloy. The proportion of the area of cohesive failure to the bonded area showed an interrelationship with the shear bond strength testing results.  相似文献   

7.
目的:比较不同底涂剂对硅橡胶和丙烯酸树脂黏结强度的影响。方法:取丙烯酸树脂试件8组,其中6组涂不同配方的自制底涂剂,1组涂Cosmesil G611底涂剂,对照组不涂底涂剂,晾干后,与硅橡胶黏结,测试其抗剪强度。应用傅立叶变换红外光谱法对D配方底涂剂的特征吸收谱带进行分析。结果:D配方底涂剂可产生2.20MPa的抗剪强度,Cosmesil G611底涂剂组的抗剪强度为1.44MPa,不涂底涂剂组没有任何黏结力。结论:γ-MPS的浓度与二者的黏结强度密切相关,D配方底涂剂组硅橡胶和丙烯酸树脂间的黏结强度最高。  相似文献   

8.
目的:通过对2 种修复用氧化物陶瓷与3 种树脂水门汀的粘接抗剪强度比较,探讨适合牙科氧化物陶瓷的粘接材料.方法: 分别用3 种树脂水门汀Superbond C&B、RelyX~(TM)Unicem、Panavia~(TM) F与喷砂后的氧化锆(ZrO2)及三氧化二铝(Al_2O_3)陶瓷的粘接面粘接,37 ℃水浴24 h后测试其粘接抗剪强度,数据用SAS 9.12 软件进行统计学分析.结果: Al_2O_3陶瓷组间均有显著性差异(P<0.000 1), Superbond C&B粘接强度最高为(37.60±2.06) MPa. ZrO2陶瓷组中Superbond C&B与Panavia~(TM) F的粘接强度差异无显著性(P>0.05),RelyX~(TM)Unicem粘接强度最低为(13.29±3.05) MPa.结论: Superbond C&B、Panavia~(TM) F与氧化物陶瓷均具有较高的粘接强度,一步法自酸蚀粘接剂RelyX~(TM)Unicem虽然操作简便、提高了工作效率,但不如多步法系统获得的粘接强度大.  相似文献   

9.
目的探讨不同表面处理方式对国产口腔二硅酸锂玻璃陶瓷与树脂水门汀之间粘接强度的影响。方法选择尺寸为15 mm×13 mm×3 mm的二硅酸锂玻璃陶瓷试件,分别进行酸蚀实验和酸蚀后偶联处理实验。酸蚀实验选择128个玻璃陶瓷试件,按照随机数表法随机分为8个处理时间点(每个时间点样本量为16),使用4.5%氢氟酸分别进行0(对照)、10、20、30、40、60、120及180 s的表面酸蚀,再将酸蚀后试件分为偶联处理组(涂布硅烷偶联剂)和无偶联处理组(不涂布硅烷偶联剂)(每组样本量均为8),分别制作粘接试件;测试粘接强度并分析断裂模式。另选8个玻璃陶瓷试件分别行上述时间点酸蚀后进行扫描电镜观察。选择酸蚀实验中的最佳酸蚀时间,进行酸蚀后偶联处理实验。选择玻璃陶瓷试件24个,4.5%氢氟酸酸蚀后涂布偶联剂,分别进行室温放置、60及100℃热风处理60 s(每组样本量为8),之后制作粘接试件;测试粘接强度并分析断裂模式。另选3个试件分别进行酸蚀后偶联处理实验相应处理后再行红外光谱分析。结果无论是否使用偶联剂,试件在氢氟酸酸蚀30 s时均可获得最大粘接强度;酸蚀30 s条件下,偶联处理组粘接强度[(25.91±4.30)MPa]显著大于无偶联处理组[(20.27±4.92)MPa](P<0.05);若酸蚀时间过长(>30 s),则粘接强度下降明显,试件表面显示过酸蚀的微观形貌。酸蚀后偶联处理实验显示,60℃热风组粘接强度最大[(28.70±5.32)MPa],显著大于室温组[(20.08±3.64)MPa]和100℃热风组[(25.64±4.86)MPa](P<0.05),且试件断裂模式均为内聚破坏;红外光谱分析显示,60℃热风组试件表面Si—O—Si键生成量最多,100℃热风组次之,室温组最低。结论4.5%氢氟酸酸蚀二硅酸锂玻璃陶瓷的最佳酸蚀时间为30 s,涂布硅烷偶联剂可获得较理想的粘接效果;60℃热风处理可进一步提高二硅酸锂玻璃陶瓷与树脂水门汀之间的粘接强度。  相似文献   

10.
Objective:To determine if a new unfilled experimental self-etching primer (SEP) adhesive system (SBP-40TX + C&B Metabond) that incorporates a methyl methacrylate–based 4-META/TBB (4-methacryloxyethyl trimellitate anhydride tri-n-butyl borane) resin can provide adequate shear bond strength (SBS) when used for bonding orthodontic brackets.Methods and Materials:Forty-eight human maxillary premolars were randomly divided into three groups of 16 specimens each. Brackets were bonded with three bonding systems. A filled Bis-GMA/TEGDM (triethylene glycol dimethacrylate)–based SEP adhesive system (Transbond Plus) and an unfilled conventional etch-and-rinse adhesive system (C&B Metabond) were used for comparison. The SBS for each sample was examined with a universal testing machine, and the Adhesive Remnant Index score was calculated. Enamel surfaces after conditioning were examined using a scanning electron microscope. Data were compared by one-way analysis of variance and a χ2 test.Results:The experimental SEP showed a milder etching pattern than Transbond Plus SEP. No statistically significant differences in the mean SBS were found between the specimens bonded with the unfilled experimental SEP adhesive system (10.0 MPa) and the filled SEP adhesive system (8.7 MPa). The unfilled experimental SEP adhesive system showed less residual adhesive than the filled SEP adhesive system.Conclusions:The unfilled experimental SEP adhesive system showed a clinically sufficient SBS that was equivalent to the filled SEP adhesive system.  相似文献   

11.
目的:考察不同施力方向上树脂粘结剂与人牙釉质的剪切粘结强度。方法:使用树脂类粘结剂A(Clearfil SE BOND)和B(Prime&Bond NT),将各自配套的复合树脂粘结在离体人牙釉质面上,当剪切力沿根尖、骀面、近中和远中方向作用时测量其剪切粘结强度。结果:粘结剂A和B与牙釉质的剪切粘结强度值显示,根尖方向[分别为(44.38±3.68)Pa和(45.50±2.88)Pa]〉近中方向[分别为(37.81±7.56)Pa和(40.15±2.59)Pa]和远中方向[分别为(35.71±3.34)Pa和(35.75±4.15)Pa]〉[牙合]面方向[分别为(29.19±3.75)Pa和(33.44±3.79)Pa],近中方向和远中方向间差异无统计学意义(P〉0.05),根尖方向与[牙合]面方向间差异有统计学意义(P〈0.05)。结论:树脂粘结剂与人牙釉质剪切粘结强度的大小与剪切力作用的方向相关。  相似文献   

12.
目的研究不同存储条件下6种通用型粘接剂及喷砂条件对聚醚醚酮(PEEK)与复合树脂之间粘接强度和耐久性的影响。 方法将PEEK材料切割成12个边长为2 cm的正方体试件。对其中6个试件进行氧化铝喷砂处理。6种通用型粘接剂为:Tetric N-Bond Universal(TNU)、Single Bond Universal(SBU)、DX.BOND UNI(DXB)、Selective Etch Bond(SEB)、Gluma Bond Universal(GBU)、Prime & Bond Universal(PBU)。实验分为7组,每组包含4个喷砂面和4个未喷砂面。7种表面处理方法分别为:不使用粘接剂(对照组)和6种通用型粘接剂(实验组:TNU组、SBU组、DXB组、SEB组、GBU组、PBU组)。经表面处理后,将流动复合树脂F00注入透明模具并将其无压力置于试件表面后进行光照固化。试件分别在37 ℃恒温水浴24 h或冷热循环3000次后进行剪切粘接强度测试。使用松风EyeSpecial C-Ⅳ口腔专用相机微距模式进行断面拍照并进行断裂模式分析。采用SPSS 23.0软件Three-Way ANOVA(冷热循环、粘接剂与喷砂)与Tukey方法对各组数据进行统计分析(α = 0.05)。 结果24 h水浴条件下,TNU组分别获得不喷砂组(9.92 ± 1.19)MPa与喷砂组(9.97 ± 1.03)MPa最高粘接强度;冷热循环3000次后PBU组分别获得不喷砂组(6.75 ± 0.99)MPa与喷砂组(7.22 ± 1.30)MPa最高粘接强度。三因素分析结果显示:冷热循环(F = 3 045.429,P<0.001)、粘接剂(F = 361.165,P<0.001)与喷砂(F = 80.050,P<0.001)可显著影响粘接强度;冷热循环与粘接剂(F = 155.724,P<0.001)、粘接剂与喷砂(F = 3.535,P = 0.002)、冷热循环与喷砂(F = 9.184,P = 0.003)两两因素间分别具有交互作用;冷热循环、粘接剂与喷砂三因素间具有交互作用(F = 12.392,P<0.001)。 结论(1)喷砂有助于改善通用型粘接剂对复合树脂与PEEK 37 ℃恒温水浴24 h粘接强度;(2)复合树脂与PEEK粘接强度在冷热循环3000次后显著降低;(3)本实验中PBU组粘接耐久性优于其他粘接系统。  相似文献   

13.
目的 研究3种偶联剂对铸造纯钛试件与硬质复合树脂结合强度的影响。方法 用牙科铸钛的方法制作40个直径8 mm、高3 mm的圆盘状纯钛试件,与树脂粘接面用碳化硅砂纸在流水下打磨、Al2O3喷砂、4%氢氟酸(HF)酸蚀。试件随机分为4组,每组10个。对照组(A组)、硅烷偶联剂组(B组)、Alloy Primer组(C组)、Metal photo primer组(D组)。然后在试件表面均匀涂布硬质复合树脂,检测其与纯钛试件的剪切强度,并进行统计学分析,同时对断裂面进行扫描电镜(SEM)观察。结果 A、B、C、D组剪切强度分别为(9.773±0.67)、(11.463±0.82)、(14.224±0.75)、(13.157±0.73) MPa。A组与B、C、D组的剪切强度相比差异有统计学意义(P<0.01),B组与C、D组的剪切强度相比差异有统计学意义(P<0.01),C组与D组的剪切强度相比差异无统计学意义(P>0.05)。结论 KH-570硅烷偶联剂、Alloy Primer 偶联剂、Metal photo primer偶联剂可以显著提高钛与硬质复合树脂的结合强度,KH-570硅烷偶联剂处理组的结合强度低于Alloy Primer偶联剂组和Metal photo primer偶联剂组。  相似文献   

14.

PURPOSE

This study was performed to evaluate shear bond strength (SBS) between three dual-cured resin cements and silica coated zirconia, before and after thermocycling treatment.

MATERIALS AND METHODS

Sixty specimens were cut in 15 × 2.75 mm discs using zirconia. After air blasting of 50 µm alumina, samples were prepared by tribochemical silica coating with Rocatec™ plus. The specimens were divided into three groups according to the dual-cure resin cement used: (1) Calibra silane+Calibra®, (2) Monobond S+Multilink® N and (3) ESPN sil+RelyX™ Unicem Clicker. After the resin cement was bonded to the zirconia using a Teflon mold, photopolymerization was carried out. Only 10 specimens in each group were thermocycled 6,000 times. Depending on thermocycling treatment, each group was divided into two subgroups (n=10) and SBS was measured by applying force at the speed of 1 mm/min using a universal testing machine. To find out the differences in SBS according to the types of cements and thermocycling using the SPSS, two-way ANOVA was conducted and post-hoc analysis was performed by Turkey''s test.

RESULTS

In non-thermal aged groups, SBS of Multilink group (M1) was higher than that of Calibra (C1) and Unicem (U1) group (P<.05). Moreover, even after thermocycling treatment, SBS of Multilink group (M2) was higher than the other groups (C2 and U2). All three cements showed lower SBS after the thermocycling than before the treatments. But Multilink and Unicem had a significant difference (P<.05).

CONCLUSION

In this experiment, Multilink showed the highest SBS before and after thermocycling. Also, bond strengths of all three cements decreased after thermocycling.  相似文献   

15.
李俊雄  李丽华 《口腔材料器械杂志》2022,31(3):192-199,224,228
目的 采用Meta分析的方法评价激光辅助金属托槽瓷面粘接的效果。方法 检索PubMed、The Cochrane Library、CBM、CNKI、万方数据库,搜集关于激光辅助金属托槽瓷面粘接时剪切粘接强度或瓷面粘接剂残余指数的文献,检索年限均为自建库至2021年5月。根据Cochrane系统评价者手册实施文献筛选,以Stata 16.0进行异质性检验、发表偏倚检验及敏感性分析,并使用RevMan 5.4进行亚组分析。结果 最终纳入12篇文献。以剪切粘接强度为结局指标的文献12篇,包含16组研究数据;以瓷面粘接剂残余指数为结局指标的文献4篇,包含5组研究数据。Meta分析的结果显示:与氢氟酸处理瓷面相比较,在粘接金属托槽前使用激光处理瓷面,可以使瓷面粘接剂残余指数降低[MD=-1.44,95% CI(-2.37,-0.51),P=0.001]。而对于剪切粘接强度,激光处理瓷面后相较于氢氟酸并未显示出更强的效果[MD=-0.63,95%CI(-1.19,-0.07),P=0.000]。结论 与氢氟酸处理瓷面的传统方法相比,激光辅助金属托槽瓷面粘接可降低瓷面粘接剂残余指数,不能增强剪切粘接强度。激光处理瓷面后,大部分研究结果能够满足正畸临床所需求的粘接强度,并能在一定程度上降低托槽去粘接后瓷面损伤而带来的重新修复的风险。  相似文献   

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目的:本实验的目的是研究瓷表面进行不同的表面粗化处理对其与树脂粘接剂粘接强度的影响.方法:VITA金属烤瓷四块(15mm×7mm×5mm)根据表面粗化方式的不同随机分为五组:无表面处理组(对照组)、喷砂-Porcelain Primer+FL-BONDⅡ组(S-PF组)、喷砂-HF+Porcelain Primer+FL-BONDⅡ组(S-H-PF组)、车针打磨-Porcelain Primer+FL-BONDⅡ组(B-PF组)、车针打磨-HF+Porcelain Primer+FL-BONDⅡ组(B-H-PF组).每组9个样本,采用微拉伸测力仪测力,所得数据采用方差分析进行统计学分析.采用扫描电子显微镜SEM观察瓷-树脂粘接界面的微观形貌.结果:结果显示对照组的粘接强度(17.0±1.7)MPa,S-PF组的粘接强度(24.1±3.5)MPa,S-H-PF组的粘接强度(24.5±4.2)MPa;B-PF组的粘接强度(24.2±4.4)MPa,B-H-PF组的粘接强度(29.9±7.5) MPa,粘接强度最大(P<0.05).扫描电子显微镜(Scanning Electron Microscope,SEM)显示B-H-PF组获得最佳的粘接界面质量,其界面均匀、致密,未出现明显的裂隙,其他各组界面现不同程度的微小裂隙.结论:瓷表面经不同表面粗化处理对其粘接强度存在一定的影响,车针打磨结合HF可获得较好的粘接效果.  相似文献   

17.
目的:比较2种不同贴面材料与3种不同的瓷贴面粘接系统粘接后的粘接强度。方法:应用3种不同的瓷贴面粘接系统(Panavia F、Variolink Veneer、RelyX Veneer),将经过相同处理的离体牙和2种不同的贴面材料(IPS e.max铸瓷和CERAM-AGE聚合瓷)粘接,每组中随机选取一半试件(n=8)37℃水浴24 h,另一半(n=8)冷热循环5 000次后测试其剪切强度,电镜下观察断裂模式。结果:IPS e.max铸瓷组和CERAMAGE聚合瓷组中Variolink Veneer粘接系统在37℃水浴24 h后或5 000次冷热循环后都表现出了最高的粘接强度(P<0.05),所有试件在经过5 000次冷热循环后的粘接强度除Panavia F组外都有明显下降。结论:对于IPS e.max铸瓷和CERAMAGE聚合瓷,Variolink Veneer粘接系统的粘接强度高于Panavia F和RelyXVeneer粘接系统。  相似文献   

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OBJECTIVES: The purpose of the current study was to evaluate the effects of two metal conditioners on the bond durability of an adhesive resin joined to noble metal alloys by comparing pre- and post-thermocycling bond strengths. METHODS: Two different sizes of disk specimens (10 and 8mm in diameter by 2.5mm thickness) were prepared from silver-indium (Ag-In-Zn, Salivan), silver-palladium-copper-gold (Ag-Pd-Cu, Castwell M.C.12), metal-ceramic gold (Au-Pt-Pd, Degudent-Universal), metal-ceramic palladium (Pd-Ga-Co, PTM 88), type IV gold (type IV, Casting Gold) alloys, and pure silver (pure Ag). The specimens were air-abraded with 50-microm grain sized alumina, conditioned either with a thiouracil primer (Metaltite) or with a thione-phosphate primer (Alloy Primer), then bonded with an adhesive resin (Super-Bond Opaque). Shear bond strengths were determined both before and after repeated thermocycling (4 degrees C and 60 degrees C, 1min each, 100, 000cycles). The results were compared by analysis of variance and post-hoc multiple comparison intervals. RESULTS: The average post-thermocycling bond strengths in MPa (n=8) generated with the thiouracil primed and thione-phosphate primed groups, respectively, were: 3.4 and 5.8 for the Ag-In-Zn alloy, 40.4 and 37.7 for the Ag-Pd-Cu alloy, 26.4 and 33.5 for the Au-Pt-Pd alloy, 27.4 and 36.6 for the Pd-Ga-Co alloy, 40.2 and 40.3 for the type IV alloy, and 37.3 and 32.4 for the pure Ag. The Ag-In-Zn alloy exhibited significantly lower bond strength than the other alloys, whereas the Ag-Pd-Cu and type IV alloys exhibited the greatest magnitude of bond strength for both primers (p<0.05). CONCLUSIONS: It can be concluded that the combined use of either of the two thione primers and the adhesive resin is effective for bonding the metal/alloys examined, with the exception of the Ag-In-Zn alloy.  相似文献   

19.
目的:评价3种树脂水门汀对CAD/CAM全瓷-牙本质剪切强度的影响。方法:选取新鲜拔除的人磨牙30颗,制备牙本质黏结面,随机分为3组(n=10),分别选用全酸蚀树脂水门汀RelyX ARC、自酸蚀树脂水门汀Clearfil DCBond和自黏结树脂水门汀RelyX Unicem对CAD/CAM硅酸锂玻璃全瓷进行黏结,测试3种树脂水门汀对CAD/CAM全瓷-牙本质的剪切强度,并通过立体显微镜观察牙本质的黏结界面。采用SPSS11.0软件包对数据进行统计学分析。结果:RelyX ARC组的剪切强度为(15.90±6.15)MPa,Clearfil DC Bond组的剪切强度为(14.41±5.07)MPa,而RelyXUnicem组的剪切强度为(23.29±7.39)MPa,与前2组相比有显著性差异(P<0.05)。立体显微镜观察显示,3组黏结断面均位于牙本质与树脂水门汀之间。结论:自酸蚀树脂水门汀及自黏结树脂水门汀与CAD/CAM硅酸锂玻璃陶瓷修复体的黏结强度不低于传统全酸蚀树脂水门汀,且临床操作简便,为临床全瓷黏结提供了更多便利与选择。  相似文献   

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