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Influence of collagen cross-linkers addition in phosphoric acid on dentin biomodification and bonding of an etch-and-rinse adhesive.
Dental Materials ( IF 5 ) Pub Date : 2019-11-30 , DOI: 10.1016/j.dental.2019.11.019 D M De-Paula 1 , D Lomonaco 2 , A M P Ponte 3 , K E Cordeiro 3 , M M Moreira 1 , S E Mazzetto 4 , V P Feitosa 3
Dental Materials ( IF 5 ) Pub Date : 2019-11-30 , DOI: 10.1016/j.dental.2019.11.019 D M De-Paula 1 , D Lomonaco 2 , A M P Ponte 3 , K E Cordeiro 3 , M M Moreira 1 , S E Mazzetto 4 , V P Feitosa 3
Affiliation
OBJECTIVE
To investigate the effects of natural collagen cross-linkers incorporation in phosphoric acid etchant on dentin biomodification, microtensile bond strength (μTBS) and nanoleakage (NL) of a two-step etch-and-rinse adhesive.
METHODS
Experimental aqueous solution of 37% ortho-phosphoric acid were prepared with the addition of 2% biomodification agents: Lignin (LIG) from industrial paper production residue, Cardanol (CARD) from cashew-nut shell liquid, and Proanthocyanidin (PAC) from grape-seed extract. Negative control (NC) was acid solution without cross-linker whilst commercial control (CC) was Condac 37 gel (FGM). Dentin specimens were assayed by FTIR after 15s etching to detect collagen cross-linking. Extracted third molars were used for μTBS (n=7) and fracture mode analysis of Optibond S (Kerr), tested after 24h or 1000 thermal cycles. NL was surveyed by SEM. Statistical analysis was performed with two-way ANOVA and Tukey's test (p<0.05).
RESULTS
FTIR confirmed cross-linking for all agents. μTBS of CC was the highest (46.6±6.2MPa), but reduced significantly after aging (35.7±5.2MPa) (p<0.001). LIG (30.6±3.7MPa) and CARD (28.3±1.8MPa) attained similar μTBS which were stable after aging (p>0.05). Fracture mode was predominantly adhesive. At 24h, all groups showed presence of silver uptake in hybrid layer, except CARD. After aging, CARD- and LIG-treated specimens exhibited little amount of silver penetration. CC, PAC and NC showed gaps, great nanoleakage at hybrid layer and presence of water channels in adhesive layer.
SIGNIFICANCE
Altogether, ortho-phosphoric acid incorporated with LIG and CARD promotes stable resin-dentin bond strength with minor nanoleakage after aging, thereby achieving therapeutic impact without additional clinical steps.
中文翻译：
磷酸中胶原交联剂的添加对牙本质生物改性和蚀刻与冲洗粘合剂粘合的影响。
目的探讨天然胶原交联剂在磷酸腐蚀剂中的掺入对两步腐蚀和漂洗粘合剂的牙本质生物改性，微拉伸键强度（μTBS）和纳米渗漏（NL）的影响。方法制备了37％正磷酸的实验水溶液，并添加了2％生物改性剂：工业造纸废渣中的木质素（LIG），腰果壳液中的腰果酚（CARD）和葡萄中的原花色素（PAC）种子提取物。阴性对照（NC）是不含交联剂的酸性溶液，而商用对照（CC）是Condac 37凝胶（FGM）。蚀刻15秒后，通过FTIR对牙本质标本进行检测，以检测胶原蛋白的交联。提取的第三磨牙用于μTBS（n = 7）和Optibond S（Kerr）的断裂模式分析，在24h或1000个热循环后进行测试。NL由SEM进行了调查。使用双向方差分析和Tukey检验进行统计学分析（p <0.05）。结果FTIR证实了所有试剂的交联。CC的μTBS最高（46.6±6.2MPa），但老化后显着降低（35.7±5.2MPa）（p <0.001）。LIG（30.6±3.7MPa）和CARD（28.3±1.8MPa）达到相似的μTBS，且老化后稳定（p> 0.05）。断裂模式主要是粘附性的。在第24h，除CARD外，所有组均显示杂种层中存在银摄取。老化后，经CARD和LIG处理的样品几乎没有银渗透。CC，PAC和NC均显示出间隙，杂化层中的纳米泄漏量大以及粘合剂层中存在水通道。意义总的来说，
更新日期：2019-11-30
中文翻译：
磷酸中胶原交联剂的添加对牙本质生物改性和蚀刻与冲洗粘合剂粘合的影响。
目的探讨天然胶原交联剂在磷酸腐蚀剂中的掺入对两步腐蚀和漂洗粘合剂的牙本质生物改性，微拉伸键强度（μTBS）和纳米渗漏（NL）的影响。方法制备了37％正磷酸的实验水溶液，并添加了2％生物改性剂：工业造纸废渣中的木质素（LIG），腰果壳液中的腰果酚（CARD）和葡萄中的原花色素（PAC）种子提取物。阴性对照（NC）是不含交联剂的酸性溶液，而商用对照（CC）是Condac 37凝胶（FGM）。蚀刻15秒后，通过FTIR对牙本质标本进行检测，以检测胶原蛋白的交联。提取的第三磨牙用于μTBS（n = 7）和Optibond S（Kerr）的断裂模式分析，在24h或1000个热循环后进行测试。NL由SEM进行了调查。使用双向方差分析和Tukey检验进行统计学分析（p <0.05）。结果FTIR证实了所有试剂的交联。CC的μTBS最高（46.6±6.2MPa），但老化后显着降低（35.7±5.2MPa）（p <0.001）。LIG（30.6±3.7MPa）和CARD（28.3±1.8MPa）达到相似的μTBS，且老化后稳定（p> 0.05）。断裂模式主要是粘附性的。在第24h，除CARD外，所有组均显示杂种层中存在银摄取。老化后，经CARD和LIG处理的样品几乎没有银渗透。CC，PAC和NC均显示出间隙，杂化层中的纳米泄漏量大以及粘合剂层中存在水通道。意义总的来说，
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