Silver nanoparticles versus chitosan nanoparticles effects on demineralized enamel

Area of Science:

• Biomaterials Science
• Dental Materials Science
• Nanotechnology in Dentistry

Background:

• Dental caries remains a significant public health concern.
• Remineralization strategies are crucial for preventing and reversing early enamel demineralization.
• Nanoparticles offer novel therapeutic potential for dental applications.

Purpose of the Study:

• To investigate and compare the efficacy of chitosan nanoparticles (ChiNPs) and silver nanoparticles (AgNPs) as remineralizing agents for demineralized human enamel.
• To evaluate the impact of these nanoparticles on enamel microhardness, mineral content, and surface morphology.

Main Methods:

• Forty extracted human premolars with induced demineralization were used.
• Teeth were divided into four groups: control, demineralized only, demineralized treated with ChiNPs, and demineralized treated with AgNPs.
• Microhardness, SEM, and EDX analyses were performed to assess remineralization.

Main Results:

• Groups treated with ChiNPs and AgNPs exhibited significantly higher microhardness compared to the demineralized control group.
• Elemental analysis revealed increased calcium (Ca) and phosphorous (P) content in the nanoparticle-treated groups.
• SEM imaging demonstrated restoration of enamel surface architecture with reduced microporosity in ChiNP and AgNP treated samples.

Conclusions:

• Both chitosan nanoparticles and silver nanoparticles demonstrate significant potential for remineralizing demineralized enamel.
• These nanoparticles aid in restoring the mineral content and surface integrity of tooth enamel.
• ChiNPs and AgNPs represent promising biomaterials for future dental restorative and preventive therapies.