The aim of this pilot study was to evaluate the shear bond strength of superficial bovine incisor dentin in different crown regions. Bonding was performed to the incisal, middle and cervical thirds of superficial bovi...The aim of this pilot study was to evaluate the shear bond strength of superficial bovine incisor dentin in different crown regions. Bonding was performed to the incisal, middle and cervical thirds of superficial bovine coronal dentin (n = 20) with a two-step etch-and-rinse adhesive (Optibond Solo Plus) and resin composite (Z100). Shear bond strength was evaluated at 24 h and failure modes of representative specimens wereobserved with FE-SEM. Non-parametric Kruskal-Wallis test with a significance level of 0.05 was used for data analysis. Mean shear bond strength values for the incisal, middle, and cervical thirds were 36.9 (3.1), 42.6 (2.6), and 37.1 (2.1) respectively with no significant differences evidenced between the crown thirds (p = 0.19). Observation of the failure mode of representative specimens demonstrated that specimens with high bond strength values exhibited predominantly mixed-type failures whereas low strength specimens exhibited adhesive failures between the dentin and adhesive. The absence of significant differences in shear bond strength between crown thirds indicate that, regardless of tubule orientation, any crown region can be used when superficial bovine incisor dentin is used for shear bond strength testing.展开更多
Background: To date there is not a material considered ideal for the lased dentin. Objective: To compare the bond strength to human lased dentin of self-etch and etch-and-rinse adhesive systems, a self-adhesive resin ...Background: To date there is not a material considered ideal for the lased dentin. Objective: To compare the bond strength to human lased dentin of self-etch and etch-and-rinse adhesive systems, a self-adhesive resin composite and a glass-ionomer cement. Methods: Forty human molars were sectioned to obtain a 2 mm-thick slab of mid-coronal dentin. The occlusal surface of each slab was polished by SiC paper (P600) for 10 s. Then an half part of dentin slabs was randomly selected for receiving treatment with 2.94 μm Er:YAG laser (DEKA, Smart 2940D Plus) with 10 Hz at 100 mJ, pulse duration of 230 μs with contact tip. Dentin slabs were randomly divided into four groups (n = 10). Six conical frustum-shaped build-ups were constructed on the occlusal surface of each dentin slab using bonding agents (OptiBond Solo Plus Group 1;OptiBond All-in-one Group 2) combined with a resin composite (Premise Flow), self-adhesive resin composites (Vertise Flow Group 3) and a glass-ionomer cement (Ketac-Fil Group 4). Specimens were subjected to μSBS test. Data were analyzed by a mixed model and Tukey’s test. Results: Measured bond strengths were (mean ± standard deviation): 20.8 ± 5.5 MPa (laser treatment) and 15.6 ± 4.5 MPa (SiC paper) for Group 1, 18.9 ± 5.3 MPa (laser treatment) and 14.0 ± 4.3 MPa (SiC paper) for Group 2, 7.9 ± 2.8 MPa (laser treatment) and 4.3 ± 2.2 MPa (SiC paper) for Group 3, 4.7 ± 1.9 MPa (laser treatment) and 2.6 ± 1.2 MPa (SiC paper) for Group 4. The inferential analysis showed that the dentin laser treatment significantly affected the bond strength within each individual group. On dentin treated with laser the bond strengths recorded for build-ups constructed with etch and rinse and self-etch adhesive systems were significantly higher than those recorded for build-ups constructed with self-adhesive resin composite and glass-ionomer cement (p < 0.0001). Similarly, on dentin treated with SiC paper the bond strengths recorded for build-ups constructed with etch and rinse and self-etch adhesive systems were significantly higher than those recorded for build-ups constructed with self-adhesive resin composite and glass-ionomer cement (p < 0.0001). Conclusion: Er:YAG laser treatment has increased the shear bond strength of all the adhesive materials used.展开更多
本文对银汞粘结剂Super—Bond D Liner进行了实验室评估.结果表明有优异的密封性能,可完全消除邻面洞(牙合)壁微渗漏,邻面龈壁也接近于无,与对照组相比有极显著统计学差异(P<0.001).平均剪切粘结强度为1.873Mpa.并对其机理进行探讨....本文对银汞粘结剂Super—Bond D Liner进行了实验室评估.结果表明有优异的密封性能,可完全消除邻面洞(牙合)壁微渗漏,邻面龈壁也接近于无,与对照组相比有极显著统计学差异(P<0.001).平均剪切粘结强度为1.873Mpa.并对其机理进行探讨.密封性能的提高主要由于表面处理剂(10—3液)与底胶(primer—35%HEMA)渗入脱矿牙本质后共同作用所形成的混杂层(hybrid layer),而粘结强度则可能与游离汞和粘结树脂结构有关.展开更多
目的:评估第八代通用型粘结剂Single Bond Universal对玻璃陶瓷与树脂的粘结强度。方法:选用玻璃陶瓷块40个,经砂纸打磨,超声波清洁后,随机分成4组,每组10个,分别用不同的瓷表面处理方式:对照组不处理,硅烷偶联剂处理组,HF酸处理组,HF酸...目的:评估第八代通用型粘结剂Single Bond Universal对玻璃陶瓷与树脂的粘结强度。方法:选用玻璃陶瓷块40个,经砂纸打磨,超声波清洁后,随机分成4组,每组10个,分别用不同的瓷表面处理方式:对照组不处理,硅烷偶联剂处理组,HF酸处理组,HF酸+硅烷偶联剂处理组。各组经处理后于瓷块处理表面涂布Single Bond Universal粘结剂,粘结树脂制成试件。试件经冷热循环处理5000次后,将试件置于37℃蒸馏水中保存24 h取出,使用万能力学测试仪测试各试件的抗剪切强度,并用扫描电镜观察断裂面的断裂模式。结果:在试件的抗剪切强度方面,HF酸处理组(12.7851±0.8677)MPa、HF酸+硅烷偶联剂处理组(14.7292±0.8847)MPa明显高于硅烷偶联剂处理组(4.5890±1.1483)MPa和对照组(2.0637±0.2011)MPa,而HF酸处理组、HF酸+硅烷偶联剂处理组间差异无统计学意义。在断裂模式方面,HF酸处理组和HF酸+硅烷偶联剂处理组的断裂模式主要以内聚破坏和混合破坏为主。结论:当使用Single Bond Universal粘结剂粘结复合树脂与玻璃陶瓷时,不使用硅烷偶联剂即可达到较为理想的粘结效果,为临床使用Single Bond Universal粘结剂进行树脂修补玻璃陶瓷修复体缺损提供了理论依据。展开更多
目的:研究3种粘接剂对抛光及上釉锆瓷与正畸金属托槽粘接强度和耐久性的影响。方法:选用2种通用型粘接剂Single Bond Universal(SBU)和Prime&Bond Universal(PBU),以TransbondTMMIP(TM)为对照分别将抛光组、上釉组锆瓷与上颌中切牙...目的:研究3种粘接剂对抛光及上釉锆瓷与正畸金属托槽粘接强度和耐久性的影响。方法:选用2种通用型粘接剂Single Bond Universal(SBU)和Prime&Bond Universal(PBU),以TransbondTMMIP(TM)为对照分别将抛光组、上釉组锆瓷与上颌中切牙金属托槽粘接,试样共6组(n=20)。水浴或水浴+冷热循环储存后测试全部试件剪切粘接强度(SBS),分析断裂形态以及粘接剂残留指数(ARI)。结果:粘接剂(P<0.001)和储存条件(P<0.001)显著影响锆瓷与托槽的剪切粘接强度;抛光或上釉(P=0.09)组间无统计学差异。SBU在各组中都表现出较强的粘接强度和较低的ARI,3种粘接剂间的ARI分数存在显著差异(P<0.001)。结论:粘接金属托槽与抛光及上釉锆瓷时,SBU较PBU和TM有更好的粘接性能。展开更多
目的比较4种粘接剂对牙本质的粘接强度,并观察粘接界面,评估其抗力性能。方法采用Prime&BondNT(PBNT)、Tetric N-Bond(TNB)、Clearfil SE Bond(CSEB)、G Bond(GB)4种粘接剂粘接树脂于离体下颌第三磨牙的咬合面和近中面,近中面进行...目的比较4种粘接剂对牙本质的粘接强度,并观察粘接界面,评估其抗力性能。方法采用Prime&BondNT(PBNT)、Tetric N-Bond(TNB)、Clearfil SE Bond(CSEB)、G Bond(GB)4种粘接剂粘接树脂于离体下颌第三磨牙的咬合面和近中面,近中面进行剪切力实验,记录断裂峰值;咬合面部分进行微拉伸粘接强度(TBS)测定,扫描电镜观察粘接界面形态。结果在剪切力实验中,PBNT与TNB的抗剪切粘接强度(SBS)最大,两者间差异无统计学意义(P>0.05)。PBNT的SBS高于CSEB与GB(P<0.05);TNB的SBS高于GB(P<0.05),与CSEB的强度差异无统计学意义(P>0.05)。与剪切力实验结果一致,PBNT和TNB的TBS高于CSEB和GB(P<0.05)。扫描电镜下,PBNT和TNB的树脂突比较细长,粘接层较厚;CSEB树脂突短小,GB树脂突更加稀疏。结论全酸蚀粘接剂的粘接强度较自酸蚀粘接剂高,一步法自酸蚀粘接剂强度最低;粘接剂的界面形态与粘接强度存在一定程度的关联性。展开更多
目的:研究对比磷酸酸蚀牙釉质与牙本质前后,Rely X U200自粘接树脂水门汀对Vita MarkⅡ陶瓷与牙的粘接强度。方法:分别制备20个牙釉质块(A组)和20个牙本质块(B组),各组随机分成2组;制备40个瓷块,随机分成4小组;从各组中随机抽取一小组...目的:研究对比磷酸酸蚀牙釉质与牙本质前后,Rely X U200自粘接树脂水门汀对Vita MarkⅡ陶瓷与牙的粘接强度。方法:分别制备20个牙釉质块(A组)和20个牙本质块(B组),各组随机分成2组;制备40个瓷块,随机分成4小组;从各组中随机抽取一小组样本表面用磷酸酸蚀(A_(EH)组和B_(DH)组),另外一小组不酸蚀(A_E组和B_D组),用Rely X U200将各小组牙块与Vita MarkⅡ陶瓷进行粘接,测量其剪切强度,体视显微镜观察其断裂界面。结果:A_(EH)组和A_E组的剪切强度(MPa)分别为22.20±2.85和12.37±2.98(P<0.05),界面破坏分别为1例和5例,混合破坏分别为9例和5例;B_(DH)组和B_D组的剪切强度分别为7.30±2.43和10.71±2.02,界面破坏分别是8例和7例,混合破坏分别为2例和3例。结论:表面酸蚀可增强自粘接树脂水门汀与釉质的粘接强度,降低牙本质的粘接强度。牙釉质界面破坏主要为混合破坏,牙本质界面主要为粘接界面破坏。展开更多
文摘The aim of this pilot study was to evaluate the shear bond strength of superficial bovine incisor dentin in different crown regions. Bonding was performed to the incisal, middle and cervical thirds of superficial bovine coronal dentin (n = 20) with a two-step etch-and-rinse adhesive (Optibond Solo Plus) and resin composite (Z100). Shear bond strength was evaluated at 24 h and failure modes of representative specimens wereobserved with FE-SEM. Non-parametric Kruskal-Wallis test with a significance level of 0.05 was used for data analysis. Mean shear bond strength values for the incisal, middle, and cervical thirds were 36.9 (3.1), 42.6 (2.6), and 37.1 (2.1) respectively with no significant differences evidenced between the crown thirds (p = 0.19). Observation of the failure mode of representative specimens demonstrated that specimens with high bond strength values exhibited predominantly mixed-type failures whereas low strength specimens exhibited adhesive failures between the dentin and adhesive. The absence of significant differences in shear bond strength between crown thirds indicate that, regardless of tubule orientation, any crown region can be used when superficial bovine incisor dentin is used for shear bond strength testing.
文摘Background: To date there is not a material considered ideal for the lased dentin. Objective: To compare the bond strength to human lased dentin of self-etch and etch-and-rinse adhesive systems, a self-adhesive resin composite and a glass-ionomer cement. Methods: Forty human molars were sectioned to obtain a 2 mm-thick slab of mid-coronal dentin. The occlusal surface of each slab was polished by SiC paper (P600) for 10 s. Then an half part of dentin slabs was randomly selected for receiving treatment with 2.94 μm Er:YAG laser (DEKA, Smart 2940D Plus) with 10 Hz at 100 mJ, pulse duration of 230 μs with contact tip. Dentin slabs were randomly divided into four groups (n = 10). Six conical frustum-shaped build-ups were constructed on the occlusal surface of each dentin slab using bonding agents (OptiBond Solo Plus Group 1;OptiBond All-in-one Group 2) combined with a resin composite (Premise Flow), self-adhesive resin composites (Vertise Flow Group 3) and a glass-ionomer cement (Ketac-Fil Group 4). Specimens were subjected to μSBS test. Data were analyzed by a mixed model and Tukey’s test. Results: Measured bond strengths were (mean ± standard deviation): 20.8 ± 5.5 MPa (laser treatment) and 15.6 ± 4.5 MPa (SiC paper) for Group 1, 18.9 ± 5.3 MPa (laser treatment) and 14.0 ± 4.3 MPa (SiC paper) for Group 2, 7.9 ± 2.8 MPa (laser treatment) and 4.3 ± 2.2 MPa (SiC paper) for Group 3, 4.7 ± 1.9 MPa (laser treatment) and 2.6 ± 1.2 MPa (SiC paper) for Group 4. The inferential analysis showed that the dentin laser treatment significantly affected the bond strength within each individual group. On dentin treated with laser the bond strengths recorded for build-ups constructed with etch and rinse and self-etch adhesive systems were significantly higher than those recorded for build-ups constructed with self-adhesive resin composite and glass-ionomer cement (p < 0.0001). Similarly, on dentin treated with SiC paper the bond strengths recorded for build-ups constructed with etch and rinse and self-etch adhesive systems were significantly higher than those recorded for build-ups constructed with self-adhesive resin composite and glass-ionomer cement (p < 0.0001). Conclusion: Er:YAG laser treatment has increased the shear bond strength of all the adhesive materials used.
文摘本文对银汞粘结剂Super—Bond D Liner进行了实验室评估.结果表明有优异的密封性能,可完全消除邻面洞(牙合)壁微渗漏,邻面龈壁也接近于无,与对照组相比有极显著统计学差异(P<0.001).平均剪切粘结强度为1.873Mpa.并对其机理进行探讨.密封性能的提高主要由于表面处理剂(10—3液)与底胶(primer—35%HEMA)渗入脱矿牙本质后共同作用所形成的混杂层(hybrid layer),而粘结强度则可能与游离汞和粘结树脂结构有关.
文摘目的:评估第八代通用型粘结剂Single Bond Universal对玻璃陶瓷与树脂的粘结强度。方法:选用玻璃陶瓷块40个,经砂纸打磨,超声波清洁后,随机分成4组,每组10个,分别用不同的瓷表面处理方式:对照组不处理,硅烷偶联剂处理组,HF酸处理组,HF酸+硅烷偶联剂处理组。各组经处理后于瓷块处理表面涂布Single Bond Universal粘结剂,粘结树脂制成试件。试件经冷热循环处理5000次后,将试件置于37℃蒸馏水中保存24 h取出,使用万能力学测试仪测试各试件的抗剪切强度,并用扫描电镜观察断裂面的断裂模式。结果:在试件的抗剪切强度方面,HF酸处理组(12.7851±0.8677)MPa、HF酸+硅烷偶联剂处理组(14.7292±0.8847)MPa明显高于硅烷偶联剂处理组(4.5890±1.1483)MPa和对照组(2.0637±0.2011)MPa,而HF酸处理组、HF酸+硅烷偶联剂处理组间差异无统计学意义。在断裂模式方面,HF酸处理组和HF酸+硅烷偶联剂处理组的断裂模式主要以内聚破坏和混合破坏为主。结论:当使用Single Bond Universal粘结剂粘结复合树脂与玻璃陶瓷时,不使用硅烷偶联剂即可达到较为理想的粘结效果,为临床使用Single Bond Universal粘结剂进行树脂修补玻璃陶瓷修复体缺损提供了理论依据。
文摘目的:研究3种粘接剂对抛光及上釉锆瓷与正畸金属托槽粘接强度和耐久性的影响。方法:选用2种通用型粘接剂Single Bond Universal(SBU)和Prime&Bond Universal(PBU),以TransbondTMMIP(TM)为对照分别将抛光组、上釉组锆瓷与上颌中切牙金属托槽粘接,试样共6组(n=20)。水浴或水浴+冷热循环储存后测试全部试件剪切粘接强度(SBS),分析断裂形态以及粘接剂残留指数(ARI)。结果:粘接剂(P<0.001)和储存条件(P<0.001)显著影响锆瓷与托槽的剪切粘接强度;抛光或上釉(P=0.09)组间无统计学差异。SBU在各组中都表现出较强的粘接强度和较低的ARI,3种粘接剂间的ARI分数存在显著差异(P<0.001)。结论:粘接金属托槽与抛光及上釉锆瓷时,SBU较PBU和TM有更好的粘接性能。
文摘目的比较4种粘接剂对牙本质的粘接强度,并观察粘接界面,评估其抗力性能。方法采用Prime&BondNT(PBNT)、Tetric N-Bond(TNB)、Clearfil SE Bond(CSEB)、G Bond(GB)4种粘接剂粘接树脂于离体下颌第三磨牙的咬合面和近中面,近中面进行剪切力实验,记录断裂峰值;咬合面部分进行微拉伸粘接强度(TBS)测定,扫描电镜观察粘接界面形态。结果在剪切力实验中,PBNT与TNB的抗剪切粘接强度(SBS)最大,两者间差异无统计学意义(P>0.05)。PBNT的SBS高于CSEB与GB(P<0.05);TNB的SBS高于GB(P<0.05),与CSEB的强度差异无统计学意义(P>0.05)。与剪切力实验结果一致,PBNT和TNB的TBS高于CSEB和GB(P<0.05)。扫描电镜下,PBNT和TNB的树脂突比较细长,粘接层较厚;CSEB树脂突短小,GB树脂突更加稀疏。结论全酸蚀粘接剂的粘接强度较自酸蚀粘接剂高,一步法自酸蚀粘接剂强度最低;粘接剂的界面形态与粘接强度存在一定程度的关联性。
文摘目的:研究对比磷酸酸蚀牙釉质与牙本质前后,Rely X U200自粘接树脂水门汀对Vita MarkⅡ陶瓷与牙的粘接强度。方法:分别制备20个牙釉质块(A组)和20个牙本质块(B组),各组随机分成2组;制备40个瓷块,随机分成4小组;从各组中随机抽取一小组样本表面用磷酸酸蚀(A_(EH)组和B_(DH)组),另外一小组不酸蚀(A_E组和B_D组),用Rely X U200将各小组牙块与Vita MarkⅡ陶瓷进行粘接,测量其剪切强度,体视显微镜观察其断裂界面。结果:A_(EH)组和A_E组的剪切强度(MPa)分别为22.20±2.85和12.37±2.98(P<0.05),界面破坏分别为1例和5例,混合破坏分别为9例和5例;B_(DH)组和B_D组的剪切强度分别为7.30±2.43和10.71±2.02,界面破坏分别是8例和7例,混合破坏分别为2例和3例。结论:表面酸蚀可增强自粘接树脂水门汀与釉质的粘接强度,降低牙本质的粘接强度。牙釉质界面破坏主要为混合破坏,牙本质界面主要为粘接界面破坏。
