Endo Tatsuo, Finger Werner J, Hoffmann Marcus, Kanehira Masafumi, Komatsu Masashi
Department of Restorative Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan.
Am J Dent. 2007 Jun;20(3):157-60.
To evaluate the bond strengths on enamel and dentin with a self-etch adhesive (iBond), with or without oxygen-inhibited surface layer, or covered with intermediate self-curing resin, in combination with chemical-cured composite (Core Paste).
Bond strengths on human enamel and dentin (n = 8) were determined according to the following procedures: 1. Adhesive cured under ambient air. 2. Inhibited surface wiped with ethanol. 3. Adhesive cured under nitrogen. 4. Adhesive covered with glycerol during activation. 5. Adhesive coated with glycerol for 1 minute after activation. 6. As 5, but covered for 5 minutes. 7. Cured adhesive coated with intermediate self-curing resin. 8. As 7, but intermediate resin's amine component loaded with anion exchange resin in OH- form. Shear bond strengths (SBS) were measured after 24-hour storage in 37 degrees C water.
SBSs on enamel (7.1 to 25.6 MPa) were, by ranking order (P< 0.05): 4 < 3, 5, 6 < 1, 2, 3, 6 <1, 2, 3, 7 < 1, 7, 8; SBSs on dentin (1.0 to 19.6 MPa): 1, 4, 5, 6 < 1, 2, 6 < 2, 3, 7 < 8. Oxygen inhibition had no adverse effect on enamel bond strengths. On dentin, all groups, apart from the anion exchange resin group (mean 19.6 MPa), showed bond strengths < 8 MPa. Dentin SBS of self-etch adhesive combined with self-cured resin was low, irrespective of the presence of an oxygen-inhibited layer. Deprotonization of the acidic adhesive monomer with an admixed anion exchange compound, added to an intermediate self-cured resin, was effective at overcoming the incompatibility.
评估自酸蚀粘结剂（iBond）在有或无氧抑制表层，或覆盖中间自固化树脂的情况下，与化学固化复合树脂（Core Paste）结合时，在釉质和牙本质上的粘结强度。
根据以下步骤测定人釉质和牙本质（n = 8）上的粘结强度：1. 粘结剂在环境空气中固化。2. 用乙醇擦拭抑制表层。3. 粘结剂在氮气中固化。4. 活化过程中用甘油覆盖粘结剂。5. 活化后用甘油涂覆粘结剂1分钟。6. 同5，但覆盖5分钟。7. 固化后的粘结剂涂覆中间自固化树脂。8. 同7，但中间树脂的胺成分负载OH型阴离子交换树脂。在37℃水中储存24小时后测量剪切粘结强度（SBS）。
釉质上的SBS（7.1至25.6MPa），按顺序排列（P<0.05）：4<3、5、6<1、2、3、6<1、2、3、7<1、7、8；牙本质上的SBS（1.0至19.6MPa）：1、4、5、6<1、2、6<2、3、7<8。氧抑制对釉质粘结强度无不利影响。在牙本质上，除阴离子交换树脂组（平均19.6MPa）外，所有组的粘结强度均<8MPa。无论是否存在氧抑制层，自酸蚀粘结剂与自固化树脂结合的牙本质SBS都很低。向中间自固化树脂中添加混合阴离子交换化合物对酸性粘结剂单体进行去质子化，有效地克服了不相容性。
