Alhenaki Aasem M, Attar Esra A, Alshahrani Abdullah, Farooq Imran, Vohra Fahim, Abduljabbar Tariq
Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia.
Oral and Maxillofacial Prosthodontics Department, Faculty of Dentistry, King Abdulaziz University, Jeddah 22252, Saudi Arabia.
Polymers (Basel). 2021 Mar 30;13(7):1093. doi: 10.3390/polym13071093.
The objective of this study was to synthesize and assess unfilled and filled (silica nanoparticles) dentin adhesive polymer. Methods encompassing scanning electron microscopy (SEM)-namely, energy dispersive X-ray spectroscopy (EDX), micro-tensile bond strength (µTBS) test, Fourier transform infrared (FTIR), and micro-Raman spectroscopy-were utilized to investigate Si particles' shape and incorporation, dentin bond toughness, degree of conversion (DC), and adhesive-dentin interaction. The Si particles were incorporated in the experimental adhesive (EA) at 0, 5, 10, and 15 wt. % to yield Si-EA-0% (negative control group), Si-EA-5%, Si-EA-10%, and Si-EA-15% groups, respectively. Teeth were set to form bonded samples using adhesives in four groups for µTBS testing, with and without aging. Si particles were spherical shaped and resin tags having standard penetrations were detected on SEM micrographs. The EDX analysis confirmed the occurrence of Si in the adhesive groups (maximum in the Si-EA-15% group). Micro-Raman spectroscopy revealed the presence of characteristic peaks at 638, 802, and 1300 cm for the Si particles. The µTBS test revealed the highest mean values for Si-EA-15% followed by Si-EA-10%. The greatest DC was appreciated for the control group trailed by the Si-EA-5% group. The addition of Si particles of 15 and 10 wt. % in dentin adhesive showed improved bond strength. The addition of 15 wt. % resulted in a bond strength that was superior to all other groups. The Si-EA-15% group demonstrated acceptable DC, suitable dentin interaction, and resin tag formation.
本研究的目的是合成并评估未填充和填充（二氧化硅纳米颗粒）的牙本质粘结聚合物。采用扫描电子显微镜（SEM）相关方法，即能量色散X射线光谱（EDX）、微拉伸粘结强度（µTBS）测试、傅里叶变换红外光谱（FTIR）和显微拉曼光谱，来研究硅颗粒的形状和掺入情况、牙本质粘结韧性、转化率（DC）以及粘结剂与牙本质的相互作用。硅颗粒以0、5、10和15 wt.%的比例掺入实验粘结剂（EA）中，分别得到Si-EA-0%（阴性对照组）、Si-EA-5%、Si-EA-10%和Si-EA-15%组。将牙齿分组，使用粘结剂形成粘结样本，用于µTBS测试，包括老化和未老化的情况。硅颗粒呈球形，在SEM显微照片上检测到具有标准渗透的树脂标签。EDX分析证实了粘结剂组中硅的存在（在Si-EA-15%组中含量最高）。显微拉曼光谱显示硅颗粒在638、802和1300 cm处有特征峰。µTBS测试显示Si-EA-15%组的平均值最高，其次是Si-EA-10%组。对照组的DC最高，其次是Si-EA-5%组。在牙本质粘结剂中添加15 wt.%和10 wt.%的硅颗粒可提高粘结强度。添加15 wt.%的硅颗粒后粘结强度优于所有其他组。Si-EA-15%组表现出可接受的DC、合适的牙本质相互作用和树脂标签形成。
