Taira Y, Matsumura H, Yoshida K, Kamada K, Tanaka T, Atsuta M
Department of Fixed Prosthodontics, Nagasaki University School of Dentistry, Sakamoto, Japan.
J Dent. 1998 Sep;26(7):603-8. doi: 10.1016/s0300-5712(97)00030-4.
The bonding of resin to dentine is dependent largely on surface modifications. The purpose of the present study was to test the hypothesis that a role of the metal chlorides used as primers is to initiate polymerization of resin at the resin-dentine interface, thereby affecting bond strength.
Nine primers were evaluated, comprising aqueous 2-hydroxyethyl methacrylate (HEMA) solutions containing AICl3, CeCl3, CoCl2, CuCl2, FeCl3, NiCl2, MgCl2, SnCl2 or ZnCl2, respectively. One of the two luting agents (Super-Bond resin) consisted of methyl methacrylate (MMA), 4-methacryloyloxyethyl trimellitate anhydride (4-META) and tri-n-butylborane (TBB) initiator. The other luting agent (MMA-TBB resin) consisted of MMA and TBB without 4-META. Extracted bovine teeth were ground to expose the dentine, etched with an aqueous solution of 10% phosphoric acid, primed, and then bonded with stainless-steel rods; tensile bond strengths were determined after 1-day immersion in water. Data were analysed by ANOVA and Duncan's new multiple range test (P < 0.05).
Four of the metal chlorides (CuCl2, FeCl3, MgCl2 and ZnCl2) enhanced the bond strengths of MMA-TBB resin to dentine. With Super-Bond resin, maximum bond strengths of 15.6 MPa and 19.0 MPa were recorded with primer containing 2.0 x 10(-5) mol g(-1) FeCl3 and 2.0 x 10(-6) mol g(-1) CuCl2, respectively.
Bonding techniques, combining the use of either cupric primer or ferric primer with 10% phosphoric acid etchant may be suitable for application in seating resin-bonded prostheses with TBB-initiated luting materials.
树脂与牙本质的粘结很大程度上取决于表面改性。本研究的目的是检验以下假设：用作底漆的金属氯化物的作用是在树脂 - 牙本质界面引发树脂聚合，从而影响粘结强度。
评估了九种底漆，分别为含有AlCl3、CeCl3、CoCl2、CuCl2、FeCl3、NiCl2、MgCl2、SnCl2或ZnCl2的甲基丙烯酸2 - 羟乙酯（HEMA）水溶液。两种粘结剂之一（Super - Bond树脂）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（MMA - TBB树脂）由MMA和TBB组成，不含4 - META。将拔除的牛牙磨平以暴露牙本质，用10%磷酸水溶液蚀刻，涂底漆，然后与不锈钢棒粘结；在水中浸泡1天后测定拉伸粘结强度。数据采用方差分析和邓肯新复极差检验进行分析（P < 0.05）。
四种金属氯化物（CuCl2、FeCl3、MgCl2和ZnCl2）提高了MMA - TBB树脂与牙本质的粘结强度。对于Super - Bond树脂，含2.0×10(-5) mol g(-1) FeCl3和2.0×10(-6) mol g(-1) CuCl2的底漆分别记录到最大粘结强度为15.6 MPa和19.0 MPa。
将铜底漆或铁底漆与10%磷酸蚀刻剂结合使用的粘结技术可能适用于使用TBB引发的粘结材料安装树脂粘结假体。
