Taira Y, Matsumura H, Yoshida K, Tanaka T, Atsuta M
Department of Fixed Prosthodontics, Nagasaki University School of Dentistry, Japan.
J Dent Res. 1996 Nov;75(11):1859-64. doi: 10.1177/00220345960750110701.
A variety of surface modifications with metal chlorides has been used to enhance the bond of resins to dentin. This study investigated the effectiveness of ferrous chloride in terms of the initiation of polymerization in dentin bonding. The efficacy of experimental dentin primers was evaluated via the bonding of two luting agents to dentin. The 16 primers evaluated were ferrous chloride (FeCl2) aqueous solutions, eight with and eight without 35% 2-hydroxyethyl methacrylate (HEMA). The concentrations of FeCl2 in the primers ranged from 2.0 x 10(-6) to 5.0 x 10(-4) mol/g. One luting agent (Super-Bond C&B) consisted of methyl methacrylate (MMA), 4-methacryloyloxyethyl trimellitate anhydride (4-META), and tri-n-butylborane (TBB) initiator. The other luting agent was prepared with MMA and TBB, but without 4-META. Bovine dentin surfaces were flattened, etched with an aqueous solution of 10% phosphoric acid, primed, and then bonded with stainless steel rods. Tensile strengths of the bonded specimens were measured after one-day immersion in water. Tensile testing revealed that the bond strength was influenced by the application of FeCl2 and/or HEMA. The maximum bond strength of 33.0 MPa was recorded with the use of primer containing FeCl2 and HEMA in MMA-TBB resin. In the case of Super-Bond, only surface treatment of dentin with aqueous primers containing 5.0 x 10(-5) to 2.0 x 10(-4) mol/g ferrous chloride resulted in bond strength values above 22.0 MPa. This bonding technique, combining the use of ferrous chloride primer with Super-Bond resin, may potentially be applied for seating resin-bonded restorations.
已采用多种金属氯化物进行表面改性，以增强树脂与牙本质的粘结。本研究调查了氯化亚铁在牙本质粘结中引发聚合反应方面的有效性。通过两种粘结剂与牙本质的粘结来评估实验性牙本质底漆的功效。所评估的16种底漆为氯化亚铁（FeCl₂）水溶液，其中8种含有35%甲基丙烯酸羟乙酯（HEMA），8种不含。底漆中FeCl₂的浓度范围为2.0×10⁻⁶至5.0×10⁻⁴mol/g。一种粘结剂（Super-Bond C&B）由甲基丙烯酸甲酯（MMA）、4-甲基丙烯酰氧基乙基偏苯三酸酐（4-META）和三正丁基硼烷（TBB）引发剂组成。另一种粘结剂由MMA和TBB制备，但不含4-META。将牛牙本质表面平整，用10%磷酸水溶液蚀刻，涂底漆，然后用不锈钢棒粘结。将粘结标本在水中浸泡一天后测量其拉伸强度。拉伸试验表明，粘结强度受FeCl₂和/或HEMA的应用影响。在MMA-TBB树脂中使用含FeCl₂和HEMA的底漆时，记录到的最大粘结强度为33.0MPa。对于Super-Bond，只有用含5.0×10⁻⁵至2.0×10⁻⁴mol/g氯化亚铁的水性底漆对牙本质进行表面处理，粘结强度值才会高于22.0MPa。这种将氯化亚铁底漆与Super-Bond树脂结合使用的粘结技术可能潜在地应用于树脂粘结修复体的就位。
