The aim of this study was to compare the efficacy of silane and a novel bioinspired polydopamine functionalization on the adhesion strength of glass fiber posts cemented to root dentin. Sixty-four surface treated posts [polydopamine (group 1 = 32) or silane (group 2 = 32)] were cemented in root canals of 64 extracted and decoronated mandibular premolars by using 3 commercial brands of self-adhesive resin cements (subgroups A, B and C) or a total-etch resin cement (subgroup D). The samples were subjected to push-out bond strength testing at 24 h and at 6 months after storage in water. Each sample was subdivided into six slices (three slices of the coronal and three slices of the apical) to determine the push-out bond strength in the coronal and apical third. The mean bonding strength value of the 3 slices both for the coronal and apical third was calculated as megapascals (MPa) and the data were statistically analyzed using post hoc Tukey HSD and Student t tests using four-way ANOVA (P = 0.05). Failure modes were investigated using scanning electron microscopy (SEM). The number of adhesive failures at the dentin-cement interface dropped when polydopamine was used (12–33%). Failure between the post and cement interface also dropped (4–13%) in all the resin cement groups, except the Subgroup C (17%). Polydopamine treatment significantly increased the adhesion strength for all cements compared to silanization at 24 h (P < 0.05), however at 6 months, only for the self-adhesive cements (P < 0.05). Polydopamine surface treatment improves the short-term bond strength of fiber-posts cemented to root canal dentin. The positive effect of polydopamine on long-term bond strength did not appear to be significant for the total-etch resin cement.

这项研究的目的是比较硅烷和新型生物启发的聚多巴胺官能化对胶合到牙本质牙本质上的玻璃纤维桩的粘合强度的功效。使用3个商业品牌的自粘树脂水泥（A组，A组，64个），将64个经过表面处理的桩[聚多巴胺（第1组= 32）或硅烷（第2组= 32）]固结在64个已拔除和去甲化的下颌前磨牙的根管中。 B和C）或全蚀刻树脂胶（D组）。样品在水中储存后的24小时和6个月进行了推出强度测试。将每个样品细分为六片（三片冠状和三片顶端），以确定冠状和顶端第三层的推出强度。使用四向ANOVA进行事后Tukey HSD和学生t检验（P = 0.05）。使用扫描电子显微镜（SEM）研究失效模式。使用聚多巴胺时，在牙本质-水泥界面的粘合失败次数减少了（12-33％）。除C组（17％）外，所有树脂水泥组的立柱和水泥界面之间的破坏也下降了（4-13％）。与在24小时进行硅烷化处理相比，聚多巴胺处理显着提高了所有水泥的粘合强度（P <0.05），但是在6个月时，仅对自粘水泥（P <0.05）。聚多巴胺的表面处理可改善粘合到根管牙本质的纤维桩的短期粘结强度。对于全蚀刻树脂水泥，聚多巴胺对长期粘结强度的积极影响似乎并不明显。