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:为了增加正畸粘接剂的抗菌性,减少正畸患者的龋白斑发生,现将季铵盐单体甲基丙烯酸十六烷基二甲胺(DMAHDM)以不同浓度梯度加入到流动树脂中作为一种正畸改性粘接剂,以期该种改性粘接剂在满足正畸临床粘接要求的前提下获得更好的抗...目的:为了增加正畸粘接剂的抗菌性,减少正畸患者的龋白斑发生,现将季铵盐单体甲基丙烯酸十六烷基二甲胺(DMAHDM)以不同浓度梯度加入到流动树脂中作为一种正畸改性粘接剂,以期该种改性粘接剂在满足正畸临床粘接要求的前提下获得更好的抗菌效果。方法:将DMAHDM以质量分数为0%、3%、5%、7.5%加入到3M Z350XT流动树脂中分别记为A组(0%DMAHDM+3M),B组(3%DMAHDM+3M)C组(5%DMAHDM+3M)和D组(7.5%DMAHDM+3M),并在离体牙上粘接托槽。测试托槽剪切粘结强度(shear bond strength,SBS),建立变形链球菌生物膜模型,扫描电镜观察菌斑粘附量,MTT法测得生物膜代谢活性A值来评价改性粘接剂的抗菌性能。结果:抗剪切强度分析,各组间SBS值差异有统计学意义(P=0.001),A组与B组差异无统计学意义(P=0.600),A组与C组、D组差异有统计学意义(P<0.05),C组与D组差异无统计学意义(P=0.530),与A、B组相比,C、D组SBS值下降。抗菌性能的检测,各组菌斑代谢活性(A值)差异有显著性(P=0.000),B、C、D组的抗菌效果均优于A组,C组优于B组,D组优于C组。扫描电镜观察,D组粘接剂的试件表面细菌粘附量最少。结论:在3M Z350XT流动树脂中添加7.5%DMAHDM抗菌剂作为正畸改性粘接剂,但仍能够满足正畸临床粘接的要求且抗菌效果显著,具有一定的临床应用价值。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:为了增加正畸粘接剂的抗菌性,减少正畸患者的龋白斑发生,现将季铵盐单体甲基丙烯酸十六烷基二甲胺(DMAHDM)以不同浓度梯度加入到流动树脂中作为一种正畸改性粘接剂,以期该种改性粘接剂在满足正畸临床粘接要求的前提下获得更好的抗菌效果。方法:将DMAHDM以质量分数为0%、3%、5%、7.5%加入到3M Z350XT流动树脂中分别记为A组(0%DMAHDM+3M),B组(3%DMAHDM+3M)C组(5%DMAHDM+3M)和D组(7.5%DMAHDM+3M),并在离体牙上粘接托槽。测试托槽剪切粘结强度(shear bond strength,SBS),建立变形链球菌生物膜模型,扫描电镜观察菌斑粘附量,MTT法测得生物膜代谢活性A值来评价改性粘接剂的抗菌性能。结果:抗剪切强度分析,各组间SBS值差异有统计学意义(P=0.001),A组与B组差异无统计学意义(P=0.600),A组与C组、D组差异有统计学意义(P<0.05),C组与D组差异无统计学意义(P=0.530),与A、B组相比,C、D组SBS值下降。抗菌性能的检测,各组菌斑代谢活性(A值)差异有显著性(P=0.000),B、C、D组的抗菌效果均优于A组,C组优于B组,D组优于C组。扫描电镜观察,D组粘接剂的试件表面细菌粘附量最少。结论:在3M Z350XT流动树脂中添加7.5%DMAHDM抗菌剂作为正畸改性粘接剂,但仍能够满足正畸临床粘接的要求且抗菌效果显著,具有一定的临床应用价值。
