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Layered double hydroxides for controlled fluoride release.

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Researchers developed fluoride-layered double hydroxide (F-LDH) nanomaterials for controlled fluoride ion delivery in the mouth. These F-LDH materials show potential as effective anti-caries agents, particularly in acidic environments.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Biomaterials

Background:

  • Dental caries remains a significant public health issue, necessitating advanced preventive strategies.
  • Controlled fluoride delivery systems are crucial for effective caries prevention.
  • Layered double hydroxides (LDHs) offer promising properties for drug delivery applications.

Purpose of the Study:

  • To synthesize and characterize nano-sized fluoridated layered double hydroxide (F-LDH) systems.
  • To investigate the controlled release kinetics of fluoride (F-) ions from F-LDH in oral environments.
  • To evaluate the potential of F-LDH as an alternative anti-caries agent.

Main Methods:

  • Synthesis of conventional LDH (C-LDH) via co-precipitation and nanoparticulate-LDH (N-LDH) via hydrothermal treatment.
  • Indirect synthesis of F-LDH using ion-exchange with varying agitation times and temperatures.
  • Characterization using techniques including EDX, FTIR, TGA, and SEM.
  • Evaluation of F- release profiles over 21 days in neutral and acidic media, analyzed with mathematical models.

Main Results:

  • Successfully synthesized F-LDH products with varying fluoride content.
  • Demonstrated controlled F- release profiles from the F-LDH materials.
  • Observed significantly higher F- release in acidic media compared to neutral media, with F-LDH-8 showing notable release.
  • Confirmed the successful development of F-LDH for controlled fluoride delivery.

Conclusions:

  • Nano-sized F-LDH systems were successfully developed for controlled fluoride ion delivery.
  • The synthesized F-LDH materials exhibit potential as novel anti-caries agents.
  • The release kinetics are influenced by the medium's pH, with enhanced release in acidic conditions.