Al-Asmar Ayah A, Hatamleh Khaled S, Hatamleh Muhanad, Al-Rabab'ah Mohammad
Department of Conservative Dentistry, University of Jordan Amman, Jordan, e-mail:
Department of Mechanical Engineering, Jordan University of Science and Technology, Irbid, Jordan.
J Contemp Dent Pract. 2017 Mar 1;18(3):182-187.
The aim of this study is to evaluate the effect of different combinations of various surface treatments on the shear bond strength (SBS) of repaired composite resin.
A total of 122 composite samples were prepared from Filtek Z350 XT. Samples were light cured and stored for 6 weeks. Surface treatment of old composite was done in five groups: Group I: bur roughening + phosphoric acid etching, group II: bur roughening + hydrofluoric acid etching + silane coupling agent, group II: air abrasion + phosphoric acid etching, group IV: air abrasion + phosphoric acid etching + silane coupling agent, group V: air abrasion + hydrofluoric acid etching + silane coupling agent. Bonding agent was applied to all surface-treated old composites and light cured. The fresh composite resin was bonded to treated surfaces and cured and stored in water at 37°C for 6 weeks. Shear bond strength was measured by a universal testing machine.
Shear bond strength values of all groups were not statistically significant except for group V, which showed statistically significant higher SBS than group III.
Techniques with readily available materials at the clinic can attain similar SBS to more elaborate technique involving potentially hazardous materials.
本研究的目的是评估各种表面处理的不同组合对修复复合树脂剪切粘结强度（SBS）的影响。
用Filtek Z350 XT制备了总共122个复合样本。样本经光固化并储存6周。对旧复合树脂进行表面处理分为五组：第一组：车针粗化+磷酸蚀刻；第二组：车针粗化+氢氟酸蚀刻+硅烷偶联剂；第三组：空气喷砂+磷酸蚀刻；第四组：空气喷砂+磷酸蚀刻+硅烷偶联剂；第五组：空气喷砂+氢氟酸蚀刻+硅烷偶联剂。将粘结剂应用于所有经表面处理的旧复合树脂上并进行光固化。将新鲜复合树脂粘结到处理过的表面，固化后在37°C水中储存6周。用万能试验机测量剪切粘结强度。
除第五组外，所有组的剪切粘结强度值无统计学意义，第五组的SBS显著高于第三组。
临床上使用容易获得的材料的技术可以获得与涉及潜在危险材料的更精细技术相似的SBS。
