Hasan Lamiaa A
Department of Pedodontics, Orthodontics and Preventive Dentistry, College of Dentistry, University of Mosul, Mosul, Iraq.
Saudi Dent J. 2021 Dec;33(8):1190-1196. doi: 10.1016/j.sdentj.2021.01.001. Epub 2021 Jan 13.
This research was designed to study the effects of calcium hydroxyapatite nanoparticle incorporation on polymerization as well as the shear bond strength for Heliosit adhesive.
Calcium hydroxyapatite nanoparticles were prepared from natural products using the sol-gel method, and were inspected using a transmission electron microscope. The nanoparticles were added to the conventional orthodontic adhesive at 2% wt and 4% wt concentrations. The degree of conversion for each test group was measured using a Fourier transform infrared spectroscopy device. Each adhesive group was used for bonding metal brackets to the premolar buccal enamel surface. The shear bond strength of all samples was measured.
A significant difference was found among all the study groups (p ≤ 0.05) in terms of the degree of conversion and shear bond strength. The 2% wt nanoparticle group showed the highest values for both variables. The lowest value was recorded within the 4% wt nanoparticle group in comparison to the control group.
Calcium hydroxyapatite nanoparticle incorporation with a conventional Heliosit adhesive resin to a limited concentration has improved the mechanical properties of orthodontic adhesive.
本研究旨在探讨掺入纳米羟基磷灰石对Heliosit粘合剂聚合反应以及剪切粘结强度的影响。
采用溶胶-凝胶法从天然产物制备纳米羟基磷灰石，并使用透射电子显微镜进行检测。将纳米颗粒以2%重量比和4%重量比的浓度添加到传统正畸粘合剂中。使用傅里叶变换红外光谱仪测量每个测试组的转化率。每个粘合剂组用于将金属托槽粘结到前磨牙颊面釉质表面。测量所有样品的剪切粘结强度。
在转化率和剪切粘结强度方面，所有研究组之间均存在显著差异（p≤0.05）。2%重量比纳米颗粒组的这两个变量值最高。与对照组相比，4%重量比纳米颗粒组的值最低。
在传统Heliosit粘合剂树脂中掺入有限浓度的纳米羟基磷灰石可改善正畸粘合剂的机械性能。
