Objectives: To investigate the efficacy of a new orthodontic bonding system that incorporates the primer solution in the adhesive. Materials and Methods: 90 anterior bovine teeth were divided in three groups: in Group...Objectives: To investigate the efficacy of a new orthodontic bonding system that incorporates the primer solution in the adhesive. Materials and Methods: 90 anterior bovine teeth were divided in three groups: in Group I, brackets were bonded with Transbond XT system, in Group II with GC Ortho Connect which incorporates the primer in the adhesive, and in Group III, a single layer of primer was applied on the teeth before bonding the brackets with GC Ortho Connect. After a 24-hour latency period, Shear Bond Strength (SBS) and Adhesive Remnant Index (ARI) were measured. In cases with remnants left mainly on the bracket base, energy dispersive X-ray (EDX) spectrometry was performed in order to determine the presence of calcium particles. Selected cases were examined with Scanning Electron Microscopy (SEM) analysis and in nanometer scale with a confocal visible light microscope (μsurf revolver, NanoFocus AG, Germany). Results: The mean SBS values were 7.25 ± 0.58 MPa for Group I, 6.57 ± 0.50 MPa for Group II and 7.33 ± 0.56 MPa for Group III. These differences were not statistically significant (p = 0.562). ARI evaluation showed that the debonding failure happened more frequently within the adhesive interface in Group II, whereas this occurred more often at the tooth-adhesive interface in Group III. However, statistical analysis of the ARI scores showed no significant difference in adhesive remnants among the three groups (p = 0.078). Conclusion: The GC Ortho Connect bonding system can be efficiently used for orthodontic bonding. Adding a layer of primer appears to slightly increase the SBS while causing less adhesive to remain on enamel from which brackets were debonded.展开更多
目的:研究两种不同形状的底板(燕尾状、网状)对正畸金属托槽与瓷修复体粘接强度的影响。方法:根据瓷面处理方式及所粘接托槽的不同,将80个瓷修复体随机平均分为4组:金刚砂车针打磨+燕尾状底板托槽;金刚砂车针打磨+网状底板托槽;9.6%氢氟...目的:研究两种不同形状的底板(燕尾状、网状)对正畸金属托槽与瓷修复体粘接强度的影响。方法:根据瓷面处理方式及所粘接托槽的不同,将80个瓷修复体随机平均分为4组:金刚砂车针打磨+燕尾状底板托槽;金刚砂车针打磨+网状底板托槽;9.6%氢氟酸(hydrofl uori c aci d,HF)酸蚀+燕尾状底板托槽;9.6%HF酸蚀+网状底板托槽。将粘接后的每组瓷修复体随机平均分为2组:组1用37℃人工唾液水浴24h;组2不予处理。用硅烷偶联剂、杜拉菲勒光固化复合树脂充填材料进行粘接。检测抗剪切强度及粘结剂残留指数。结果:经人工唾液水浴后,抗剪切强度燕尾状底板托槽组较网状底板托槽组高,且差别有统计学意义(P<0.05);瓷面经打磨处理后,粘结剂残留指数网状底板组高于燕尾状底板组,且差别有统计学意义(P<0.05)。结论:燕尾状底板较网状底板提供更大的抗剪切强度;瓷面经金刚砂车针打磨较用HF酸蚀提供更大的抗剪切强度,且遗留较多粘接剂。展开更多
文摘Objectives: To investigate the efficacy of a new orthodontic bonding system that incorporates the primer solution in the adhesive. Materials and Methods: 90 anterior bovine teeth were divided in three groups: in Group I, brackets were bonded with Transbond XT system, in Group II with GC Ortho Connect which incorporates the primer in the adhesive, and in Group III, a single layer of primer was applied on the teeth before bonding the brackets with GC Ortho Connect. After a 24-hour latency period, Shear Bond Strength (SBS) and Adhesive Remnant Index (ARI) were measured. In cases with remnants left mainly on the bracket base, energy dispersive X-ray (EDX) spectrometry was performed in order to determine the presence of calcium particles. Selected cases were examined with Scanning Electron Microscopy (SEM) analysis and in nanometer scale with a confocal visible light microscope (μsurf revolver, NanoFocus AG, Germany). Results: The mean SBS values were 7.25 ± 0.58 MPa for Group I, 6.57 ± 0.50 MPa for Group II and 7.33 ± 0.56 MPa for Group III. These differences were not statistically significant (p = 0.562). ARI evaluation showed that the debonding failure happened more frequently within the adhesive interface in Group II, whereas this occurred more often at the tooth-adhesive interface in Group III. However, statistical analysis of the ARI scores showed no significant difference in adhesive remnants among the three groups (p = 0.078). Conclusion: The GC Ortho Connect bonding system can be efficiently used for orthodontic bonding. Adding a layer of primer appears to slightly increase the SBS while causing less adhesive to remain on enamel from which brackets were debonded.
文摘目的:研究两种不同形状的底板(燕尾状、网状)对正畸金属托槽与瓷修复体粘接强度的影响。方法:根据瓷面处理方式及所粘接托槽的不同,将80个瓷修复体随机平均分为4组:金刚砂车针打磨+燕尾状底板托槽;金刚砂车针打磨+网状底板托槽;9.6%氢氟酸(hydrofl uori c aci d,HF)酸蚀+燕尾状底板托槽;9.6%HF酸蚀+网状底板托槽。将粘接后的每组瓷修复体随机平均分为2组:组1用37℃人工唾液水浴24h;组2不予处理。用硅烷偶联剂、杜拉菲勒光固化复合树脂充填材料进行粘接。检测抗剪切强度及粘结剂残留指数。结果:经人工唾液水浴后,抗剪切强度燕尾状底板托槽组较网状底板托槽组高,且差别有统计学意义(P<0.05);瓷面经打磨处理后,粘结剂残留指数网状底板组高于燕尾状底板组,且差别有统计学意义(P<0.05)。结论:燕尾状底板较网状底板提供更大的抗剪切强度;瓷面经金刚砂车针打磨较用HF酸蚀提供更大的抗剪切强度,且遗留较多粘接剂。
