■聚醚醚酮(PEEK)由于其优异的机械性能和生物相容性而成为备受追捧的热塑性塑料。然而,将PEEK结合到间接复合树脂(ICR)或基于义齿的树脂(DBR)可能是具有挑战性的。激光雕刻技术已显示出改善其他材料粘合的潜力;因此,本研究旨在评估其对PEEK的有效性。
■实验涉及制备晶锭形PEEK样品,然后根据所采用的治疗方法将其分为四组:不治疗,空气磨损,硫酸蚀刻,和激光雕刻(LS)。随后,样品与ICR或DBR结合,和他们的剪切粘结强度(SBS)测试有或没有热循环使用通用测试机。此外,观察到故障模式,进行统计分析以比较结果。
■LS组的网格状微缝结构显示出将PEEK与ICR或DBR键合的最高SBS(P<0.05)。在PEEK与ICR的粘接过程中,在LS组中经常观察到树脂残留和渗透到微缝中,表明有凝聚力的失败。然而,当PEEK与DBR结合时,在没有热循环的情况下,经常观察到混合物失败。热循环后,只有LS组表现出凝聚力失败,而大多数标本表现出混合物失效。
■激光雕刻显着改善了PEEK与ICR和DBR之间的SBS。此外,观察到树脂已经穿透了微狭缝,说明激光雕刻作为一种表面处理方法具有很大的潜力。
UNASSIGNED: Polyetheretherketone (PEEK) is a highly sought-after thermoplastic due to its exceptional mechanical properties and biocompatibility. However, bonding PEEK to indirect composite resin (ICR) or denture-based resin (DBR) can be challenging. Laser engraving technology has shown potential to improve bonding for other materials; thus, this study aims to evaluate its effectiveness for PEEK.
UNASSIGNED: The experiment involved preparing ingot-shaped PEEK samples, which were then categorized into four groups based on the treatment method employed: without treatment, air abrasion, sulfuric acid etching, and laser engraving (LS). Subsequently, the samples were bonded to ICR or DBR, and their shear bond strength (SBS) was tested with or without thermocycling using a universal testing machine. Furthermore, the failure mode was observed, with statistical analyses conducted to compare the results.
UNASSIGNED: The grid-like microslit structure of LS group displayed the highest SBS for bonding PEEK to ICR or DBR (P < 0.05). During the bonding of PEEK to ICR, resin residue and penetration into the microslits were frequently observed in the LS group, indicating cohesive failure. However, when PEEK was bonded to DBR, mixture failure was frequently observed without thermocycling. After thermocycling, only the LS group showed cohesive failure, while the majority of specimens exhibited mixture failure.
UNASSIGNED: Laser engraving significantly improves the SBS between PEEK and both ICR and DBR. Furthermore, it was observed that resin had penetrated the microslits, indicating that laser engraving has great potential as a surface treatment method.