Evaluation the properties of orthodontic adhesive incorporated with nano-hydroxyapatite particles

Abstract

Objective 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. Materials and methods 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. Results 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. Conclusions Calcium hydroxyapatite nanoparticle incorporation with a conventional Heliosit adhesive resin to a limited concentration has improved the mechanical properties of orthodontic adhesive.

Bond Strength Survival of a Novel Calcium Phosphate-Enriched Orthodontic Self-Etching System after Various Ageing Protocols: An In Vitro Study

“…The addition of nCaP as fillers results in structural reinforcement and enhances the adhesion of the resin material to some extent to the tooth substrate by exhibiting a primer-delivery carrier ability, thus improving the curing process [ 12 ] and strengthening the mechanical properties of the adhesive layer [ 13 ]. This limit was reported to be within the range of 0.1%–4% weight fraction of nCaP [ 12 , 13 , 26 ], beyond which an agglomeration or irregular dispersion of these nano-fillers might adversely influence the mechanical performance of bonding materials by forming defect points that interfere with the process of curing [ 13 ]. This may stand for the decrease in SBS associated with increasing the percentage of nCaP incorporated into the SEP.…”

Adhesion advances: from nanomaterials to biomimetic adhesion and applications

“…In orthodontics, resin-based composite adhesives are mainly used to fix orthodontic brackets to the tooth surface. 157 Hasan 158 prepared nano-hydroxyapatite particles by sol–gel method and incorporated them into Heliosit orthodontic adhesive. Compared with the original binder, the 2 wt% nanoparticle group showed greater improvement in both the degree of conversion and the shear strength.…”

The Effects of Aloe Vera Plant and Gel on Oral Mucosal Wound Healing in Rabbits: A Histological Study

“…In this investigation, 48 white New Zealand healthy male adult rabbits with a mean weight of (1.75-2) Kg were employed. The animals were housed in normal conditions with the same feeding and housing conditions at (25°C) room temperature and 12 hours lighting system [7]. They were fed a standard diet of wheat and fresh vegetables, as well as water.…”