Cura Maria, González-González Inmaculada, Fuentes Victoria, Ceballos Laura
Fellow Researcher, Department of Stomatology, Health Sciences Faculty, Rey Juan Carlos University, Madrid, Spain.
Doctoral student, Department of Stomatology, Health Sciences Faculty, Rey Juan Carlos University, Madrid, Spain.
J Prosthet Dent. 2016 Sep;116(3):389-96. doi: 10.1016/j.prosdent.2016.02.016. Epub 2016 Apr 23.
Additional polymerization of indirect composite resins enhances their physical properties but lessens the potential for chemical bonding.
The purpose of this in vitro study was to evaluate the influence of different surface treatments and 6-month water storage on the microtensile bond strength (μTBS) of composite resin onlays.
Composite resin onlays (Filtek Z250) randomly received 6 different surface treatments: (1) airborne-particle abrasion with 27-μm alumina particles+Adper Scotchbond 1XT adhesive application, (2) airborne-particle abrasion with alumina particles+silane application (ESPE SIL)+Adper Scotchbond 1XT, (3) airborne-particle abrasion with alumina particles+Scotchbond Universal adhesive, (4) tribochemical silica coating with 30-μm particles (CoJet Sand)+Adper Scotchbond 1XT adhesive, (5) tribochemical silica coating+silane application+Adper Scotchbond 1XT, and (6) tribochemical silica coating+Scotchbond Universal adhesive. Onlays were luted to fresh composite resin specimens with RelyX Ultimate resin cement. Bonded assemblies were stored in water for 24 hours or 6 months at 37°C and subjected to the μTBS test. Additional surface-treated composite resin onlays were analyzed with a contact profilometer to determine average roughness, and micromorphologic changes were analyzed with scanning electron microscopy.
Airborne-particle abrasion with alumina followed by Adper Scotchbond 1XT or Scotchbond Universal adhesive application provided the highest bond strength values at 24 hours. Lower values were obtained after tribochemical silica coating. After 6 months of artificial aging, airborne-particle abrasion with alumina or silica-coated alumina particles followed by Scotchbond Universal application yielded the greatest bond strength results. Airborne-particle abrasion with alumina produced the highest roughness values and a more irregular surface.
Adhesive selection seems to be relevant to the μTBS of luted composite resin onlays after 6 months of water aging, as specimens treated with Scotchbond Universal, after alumina airborne-particle abrasion or tribochemical silica coating, yielded the highest values and better aging stability.
间接复合树脂的额外聚合可增强其物理性能，但会降低化学键合的可能性。
本体外研究的目的是评估不同表面处理和6个月水储存对复合树脂高嵌体微拉伸粘结强度（μTBS）的影响。
复合树脂高嵌体（Filtek Z250）随机接受6种不同的表面处理：（1）用27μm氧化铝颗粒进行空气颗粒喷砂+应用Adper Scotchbond 1XT粘结剂，（2）用氧化铝颗粒进行空气颗粒喷砂+应用硅烷（ESPE SIL）+应用Adper Scotchbond 1XT，（3）用氧化铝颗粒进行空气颗粒喷砂+应用Scotchbond通用粘结剂，（4）用30μm颗粒进行摩擦化学二氧化硅涂层（CoJet Sand）+应用Adper Scotchbond 1XT粘结剂，（5）摩擦化学二氧化硅涂层+应用硅烷+应用Adper Scotchbond 1XT，以及（6）摩擦化学二氧化硅涂层+Scotchbond通用粘结剂。高嵌体用RelyX Ultimate树脂水门汀粘结到新鲜的复合树脂标本上。粘结组件在37°C下在水中储存24小时或6个月，并进行μTBS测试。用接触式轮廓仪分析额外进行表面处理的复合树脂高嵌体以确定平均粗糙度，并用扫描电子显微镜分析微观形态变化。
用氧化铝进行空气颗粒喷砂后再应用Adper Scotchbond 1XT或Scotchbond通用粘结剂在24小时时提供了最高的粘结强度值。摩擦化学二氧化硅涂层后得到的值较低。经过6个月的人工老化后，用氧化铝或二氧化硅涂层氧化铝颗粒进行空气颗粒喷砂后再应用Scotchbond通用粘结剂产生了最大的粘结强度结果。用氧化铝进行空气颗粒喷砂产生了最高的粗糙度值和更不规则的表面。
粘结剂的选择似乎与水老化6个月后粘结的复合树脂高嵌体的μTBS相关，因为在用氧化铝空气颗粒喷砂或摩擦化学二氧化硅涂层后用Scotchbond通用粘结剂处理的标本产生了最高的值和更好的老化稳定性。
