Purpose: The present study aimed to evaluate the effects of thermal aging on the shear bond strength of three different types of cement used to retain band and loop space maintainers cemented on extracted human perman...Purpose: The present study aimed to evaluate the effects of thermal aging on the shear bond strength of three different types of cement used to retain band and loop space maintainers cemented on extracted human permanent molar teeth. Methods: A total of 66 newly extracted permanent molars were used in this study. Eighteen teeth were used as a control and did not undergo thermal aging (six per group). All sample teeth were randomly divided into three groups: KetacCem, RelyX Luting Plus, and RelyX Unicem 2. After bonding procedures, all experimental groups undergo thermal aging. The shear bond strength of all samples was conducted using the Ultratester machine. Findings were statistically analyzed using the ANOVA and Turkey’s post hoc tests. Results: Among the examined groups, Ketac Cem presented with the highest recorded shear bond (11.4 MPa), while RelyX Luting Plus showed the lowest (3.2 MPa). The control groups recorded the highest shear bond strength compared to all examined groups;Ketac Cem showed the highest shear bond strength (12.8 Mpa), and RelyX Luting Plus had the least recorded reading (5.4 Mpa). Conclusion: Within the limitation of the present study, there was a statistically significant difference between the examined groups;Ketac Cem showed a higher shear bond cement than RelyX luting Plus and RelyX Unicem.展开更多
With the objective to evaluate the bonding efficacy of a new self-adhesive resin cement（RelyX Unicem, 3M ESPE） to enamel and dentin using a shear bonding strengths test with or without acid etching pretreatment, fla...With the objective to evaluate the bonding efficacy of a new self-adhesive resin cement（RelyX Unicem, 3M ESPE） to enamel and dentin using a shear bonding strengths test with or without acid etching pretreatment, flat buccal dentin surface and mesial/distal enamel surface were made using a high-speed diamond bur. Copper rings were luted using Rely X Unicem（RU; 3M ESPE）, Panavia F（PF; Kuraray） or Vitique（VI; DMG）. For RU, the shear bonding strengths using GL（Gluma Etch, Heraeus） acid etching pretreatment were also tested. The teeth were placed into copper rings（inner diameter： 16 mm, height： 4mm） and embedded in methylmethacrylate resin. The specimens were stored for 24 h in distilled water at 37 ℃ prior to shear bonding strengths testing. In addition, bond failures were examined by optical microscope and categorized as 4 models such as different adhesive, cohesive, or mixed. Shear bonding strengths were calculated by dividing the maximum debonding force over the cross sectional area of each specimen. The Kruskal-Wallis test was used to determine pairwise statistical differences（P 〈 0.05） in SBS between the experimental groups. For dentin bonding strength, statistical analysis showed that there was no significant difference among RU（12.84 MPa）, PF（14.93 MPa） and VI（11.03 MP）; and the bonding strengths of them were higher than RU with acid etching pretreatment（9.12 MP）. When bonded to enamel, PF（17.99 MP） and VI（17.58 MP） scored significantly higher than RU efficacy.The use of self-adhesive cement Rely X Unicem can obtain the bonding strengths to dentin similar to traditional resin cements. Phosphoric acid etching can improve the bonding strengths of the selfadhesive resin cement to enamel, but was negative for dentin.展开更多
目的:比较两种粘结体系用于前牙活髓二氧化锆全瓷冠临床修复的疗效。方法:选择2018年1月~2019年12月因前牙牙体缺损需进行活髓二氧化锆全瓷冠修复的48例患者,分为两组,观察组使用Single Bond Universal粘结剂+RelyX^(TM)Ultimate树脂水...目的:比较两种粘结体系用于前牙活髓二氧化锆全瓷冠临床修复的疗效。方法:选择2018年1月~2019年12月因前牙牙体缺损需进行活髓二氧化锆全瓷冠修复的48例患者,分为两组,观察组使用Single Bond Universal粘结剂+RelyX^(TM)Ultimate树脂水门汀,对照组使用RelyX^(TM)Unicem通用自粘结树脂型水门汀进行二氧化锆全瓷冠的粘结。分别在粘结后1周、3个月、6个月使用视觉模拟评分法评价基牙的牙本质敏感度;及粘固后6个月的牙龈指数。结果:粘结后1周、3个月、6个月,观察组牙本质敏感发生率均低于对照组,差异有统计学意义(P<0.05)。粘结后6个月,观察组牙龈指数均低于对照组,差异有统计学意义(P<0.05)。结论:Single Bond Universal粘结剂+RelyX^(TM)Ultimate树脂水门汀用于活髓牙的二氧化锆全瓷冠粘固可以有效减轻术后敏感的发生率,同时也更有利于牙周组织的健康。展开更多
目的:探讨不同树脂水门汀对氧化锆陶瓷修复体粘接强度的影响。方法:制备牙本质粘接面样本30个随机分为3组(n=10),并选择Cercon氧化锆陶瓷系统分别与3种树脂水门汀进行配伍,制备相应剪切强度试件和拉伸强度试件,分别记为RU组(Cercon氧化...目的:探讨不同树脂水门汀对氧化锆陶瓷修复体粘接强度的影响。方法:制备牙本质粘接面样本30个随机分为3组(n=10),并选择Cercon氧化锆陶瓷系统分别与3种树脂水门汀进行配伍,制备相应剪切强度试件和拉伸强度试件,分别记为RU组(Cercon氧化锆与RelyX U200)、CS组(Cercon氧化锆与Clearfil SA Luting)、ME组(Cercon氧化锆与Maxcem Elite Chroma)。采用万能力学试验机检测各试件的最大剪切载荷值及最大拉伸载荷值,计算剪切强度及拉伸强度并进行统计学分析。结果:在剪切强度测试实验中,剪切强度CS组>RU组>ME组;在拉伸强度测试中,拉伸强度CS组>RU组>ME组;CS粘接剂在剪切强度和拉伸强度测试中粘接效果均优于RU和ME组。结论:在氧化锆陶瓷的剪切强度测试及拉伸强度测试中,含有10-MDP的树脂水门汀(Clearfil SA Luting)的粘接强度最大,粘接效果最好,对于氧化锆陶瓷推荐使用含MDP的树脂水门汀。展开更多
文摘Purpose: The present study aimed to evaluate the effects of thermal aging on the shear bond strength of three different types of cement used to retain band and loop space maintainers cemented on extracted human permanent molar teeth. Methods: A total of 66 newly extracted permanent molars were used in this study. Eighteen teeth were used as a control and did not undergo thermal aging (six per group). All sample teeth were randomly divided into three groups: KetacCem, RelyX Luting Plus, and RelyX Unicem 2. After bonding procedures, all experimental groups undergo thermal aging. The shear bond strength of all samples was conducted using the Ultratester machine. Findings were statistically analyzed using the ANOVA and Turkey’s post hoc tests. Results: Among the examined groups, Ketac Cem presented with the highest recorded shear bond (11.4 MPa), while RelyX Luting Plus showed the lowest (3.2 MPa). The control groups recorded the highest shear bond strength compared to all examined groups;Ketac Cem showed the highest shear bond strength (12.8 Mpa), and RelyX Luting Plus had the least recorded reading (5.4 Mpa). Conclusion: Within the limitation of the present study, there was a statistically significant difference between the examined groups;Ketac Cem showed a higher shear bond cement than RelyX luting Plus and RelyX Unicem.
基金Funded by the National Natural Science Foundation of China(51473130)the International Cooperation Funding of Hubei Province(No.2012IHA0120)
文摘With the objective to evaluate the bonding efficacy of a new self-adhesive resin cement（RelyX Unicem, 3M ESPE） to enamel and dentin using a shear bonding strengths test with or without acid etching pretreatment, flat buccal dentin surface and mesial/distal enamel surface were made using a high-speed diamond bur. Copper rings were luted using Rely X Unicem（RU; 3M ESPE）, Panavia F（PF; Kuraray） or Vitique（VI; DMG）. For RU, the shear bonding strengths using GL（Gluma Etch, Heraeus） acid etching pretreatment were also tested. The teeth were placed into copper rings（inner diameter： 16 mm, height： 4mm） and embedded in methylmethacrylate resin. The specimens were stored for 24 h in distilled water at 37 ℃ prior to shear bonding strengths testing. In addition, bond failures were examined by optical microscope and categorized as 4 models such as different adhesive, cohesive, or mixed. Shear bonding strengths were calculated by dividing the maximum debonding force over the cross sectional area of each specimen. The Kruskal-Wallis test was used to determine pairwise statistical differences（P 〈 0.05） in SBS between the experimental groups. For dentin bonding strength, statistical analysis showed that there was no significant difference among RU（12.84 MPa）, PF（14.93 MPa） and VI（11.03 MP）; and the bonding strengths of them were higher than RU with acid etching pretreatment（9.12 MP）. When bonded to enamel, PF（17.99 MP） and VI（17.58 MP） scored significantly higher than RU efficacy.The use of self-adhesive cement Rely X Unicem can obtain the bonding strengths to dentin similar to traditional resin cements. Phosphoric acid etching can improve the bonding strengths of the selfadhesive resin cement to enamel, but was negative for dentin.
文摘目的:比较两种粘结体系用于前牙活髓二氧化锆全瓷冠临床修复的疗效。方法:选择2018年1月~2019年12月因前牙牙体缺损需进行活髓二氧化锆全瓷冠修复的48例患者,分为两组,观察组使用Single Bond Universal粘结剂+RelyX^(TM)Ultimate树脂水门汀,对照组使用RelyX^(TM)Unicem通用自粘结树脂型水门汀进行二氧化锆全瓷冠的粘结。分别在粘结后1周、3个月、6个月使用视觉模拟评分法评价基牙的牙本质敏感度;及粘固后6个月的牙龈指数。结果:粘结后1周、3个月、6个月,观察组牙本质敏感发生率均低于对照组,差异有统计学意义(P<0.05)。粘结后6个月,观察组牙龈指数均低于对照组,差异有统计学意义(P<0.05)。结论:Single Bond Universal粘结剂+RelyX^(TM)Ultimate树脂水门汀用于活髓牙的二氧化锆全瓷冠粘固可以有效减轻术后敏感的发生率,同时也更有利于牙周组织的健康。
文摘目的:探讨不同树脂水门汀对氧化锆陶瓷修复体粘接强度的影响。方法:制备牙本质粘接面样本30个随机分为3组(n=10),并选择Cercon氧化锆陶瓷系统分别与3种树脂水门汀进行配伍,制备相应剪切强度试件和拉伸强度试件,分别记为RU组(Cercon氧化锆与RelyX U200)、CS组(Cercon氧化锆与Clearfil SA Luting)、ME组(Cercon氧化锆与Maxcem Elite Chroma)。采用万能力学试验机检测各试件的最大剪切载荷值及最大拉伸载荷值,计算剪切强度及拉伸强度并进行统计学分析。结果:在剪切强度测试实验中,剪切强度CS组>RU组>ME组;在拉伸强度测试中,拉伸强度CS组>RU组>ME组;CS粘接剂在剪切强度和拉伸强度测试中粘接效果均优于RU和ME组。结论:在氧化锆陶瓷的剪切强度测试及拉伸强度测试中,含有10-MDP的树脂水门汀(Clearfil SA Luting)的粘接强度最大,粘接效果最好,对于氧化锆陶瓷推荐使用含MDP的树脂水门汀。
