Angle Orthod. 2023 Sep 1;93(5):558-565. doi: 10.2319/122322-864.1.
To quantify the amount of residual monomer released from orthodontic adhesives used in the indirect bonding technique and compare it to a direct bonding composite resin.
Five hundred stainless steel orthodontic brackets were bonded on bovine incisors using five groups of bonding resins: Transbond XT (TXT), Transbond Supreme LV (SLV), Sondhi Rapid-Set (SRS), Transbond IDB (IDB), and Custom I.Q. (CIQ). Liquid samples were gathered on the first, seventh, 21st, and 35th days. Residual monomer release was measured from the liquid samples with a liquid chromatography device. In addition, the amount and shape of the adhesive between the tooth surface and the bracket base was evaluated using obtained electron microscopy images. The data were analyzed using analysis of variance, and a Tukey post-hoc test was applied.
Hydroxyethylmethacrylate and bisphenol A-glycidyl methacrylate monomers were released by all study groups. Urethane-dimethacrylate was released from the TXT, SLV, IDB, and CIQ groups. Triethylene glycol dimethacrylate was released from TXT, SLV, IDB, and SRS groups. The amount of total monomer release was higher in chemically cured adhesives than in light-cured adhesives. Among the chemically cured adhesives, premix adhesives had the highest amount of total monomer release. The light-cured adhesives had less thickness.
Light-curing adhesives have significantly less monomer release than chemically polymerized adhesives.
定量测定间接粘结技术中使用的正畸粘结剂释放的残留单体量,并与直接粘结复合树脂进行比较。
将 500 个不锈钢正畸托槽用 5 组粘结树脂粘结在牛切牙上:Transbond XT(TXT)、Transbond Supreme LV(SLV)、Sondhi Rapid-Set(SRS)、Transbond IDB(IDB)和 Custom I.Q.(CIQ)。第 1、7、21 和 35 天采集液体样本。用液相色谱仪测量液体样本中的残留单体释放量。此外,通过获得的电子显微镜图像评估牙面与托槽基底之间的粘结剂的数量和形状。使用方差分析对数据进行分析,并应用 Tukey 事后检验。
所有研究组均释放出羟乙基甲基丙烯酸酯和双酚 A 缩水甘油甲基丙烯酸酯单体。TXT、SLV、IDB 和 CIQ 组释放出聚氨酯二甲基丙烯酸酯。TXT、SLV、IDB 和 SRS 组释放出三乙二醇二甲基丙烯酸酯。化学固化粘结剂释放的总单体量高于光固化粘结剂。在化学固化粘结剂中,预混粘结剂释放的总单体量最高。光固化粘结剂的厚度较小。
光固化粘结剂释放的单体明显少于化学聚合粘结剂。