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机构地区:[1]首都医科大学口腔医学院正畸科,100050 [2]Biomaterials & TissueEngineering Division, University of Maryland Dental School, Baltimore, MD 21201, U S A
出 处:《中华口腔医学杂志》2016年第9期558-561,共4页Chinese Journal of Stomatology
基 金:国家自然科学基金(81500879);北京市科学技术委员会科技计划(Z151100003915137)
摘 要:目的 评价甲基丙烯酰氧乙基磷酸胆碱(2-methacryloyloxyethyl phosphorylcholine,MPC)对正畸粘接剂抗蛋白附着和抗菌性能的影响,为预防正畸治疗中牙釉质脱矿提供新思路.方法 将MPC以0%(空白对照组)、1.5%、3.0%和5.0%的比例添加至商品化正畸粘接剂(Fuji ORTH0)中.收集因正畸治疗而拔除的健康前磨牙40颗,用各组粘接剂粘接托槽,制作粘接试件(每组10个),测试抗剪切强度,即粘接强度.制作粘接剂试件(每组26个),双辛丁酸法评价抗蛋白附着性能;用人唾液培养所得的牙菌斑全菌生物膜模型研究附着于粘接剂试件表面的牙菌斑生物膜的乳酸产量和活/死菌染色情况.结果 在正畸粘接剂中添加3.0%的MPC不影响正畸粘接剂的粘接强度.3.0%MPC组蛋白附着量[(0.46±0.06) μg/cm2]和乳酸产量[(7.12±1.03) mmol/L]均显著低于空白对照组[(4.57±0.42) μg/cm2和(12.16±1.24) mmol/L](P均<0.05).活/死菌染色显示3.0%MPC组试件表面黏附的活菌量明显少于空白对照组.结论 MPC改性正畸粘接剂可在不影响粘接强度的前提下显著降低蛋白附着量和细菌黏附量.Objective To develop a novel protein-repellent orthodontic adhesive by incorporating 2-methacryloyloxyethyl phosphorylcholine(MPC).Methods MPC was incorporated into a commercially available orthodontic adhesive(Fuji ORTHO) at 0% (control),1.5%,3.0%,and 5.0% by mass.Enamel shear bond strength(SBS) was determined.Protein adsorption onto specimens was determined by a micro bicinchoninic acid method.A dental plaque microcosm biofilm model with human saliva as inoculum was used to investigate biofilm viability.Results The SBS was not reduced in the group(3.0% MPC),compared to the control group.The amount of protein adsorption in the group(3.0% MPC) was (0.46±0.06) μg/cm2 and (4.57 ± 0.42) μg/cm2 in the control group.Lactic acid production of biofilms in the group(3.0% MPC) was (7.12± 1.03) mmol/L and (12.16± 1.24) mmol/L in the control group.Conclusions MPC based orthodontic adhesive greatly reduced the protein adsorption and bacterial adhesion,without compromising enamel shear bond strength.
关 键 词:细菌黏附 抗剪切强度 树脂粘固剂 甲基丙烯酰氧乙基磷酸胆碱
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