Solvothermally-derived nanoglass as a highly bioactive material.

Area of Science:

• Biomaterials Science
• Materials Chemistry
• Biomineralization

Background:

• Bioactive glasses stimulate bone regeneration by forming hydroxyapatite (HA).
• Conventional synthesis methods can be complex and time-consuming.
• Optimizing glass composition and structure is key to enhancing bioactivity.

Purpose of the Study:

• To synthesize a novel mesoporous bioactive glass (solvBG76) using a facile solvothermal method.
• To evaluate the apatite-mineralization ability, biocompatibility, and hemocompatibility of solvBG76.
• To compare solvBG76's performance against reference bioactive glasses (45S5 and 70S30C-a).

Main Methods:

• Solvothermal synthesis of 76SiO2-24CaO glass (solvBG76).
• Characterization of HA layer formation using XRD, IR-ATR, Raman, XPS, EDS, SEM, and HR-TEM.
• Biocompatibility and hemocompatibility assays using human dermal fibroblasts, MC3T3 osteoblast precursor cells, and hemolytic activity tests.

Main Results:

• SolvBG76 exhibited rapid HA layer formation (<1 hour) in a physiological-like buffer, superior to reference glasses.
• The glass possessed nano-size (<50 nm), non-spherical morphology, and a mesoporous structure.
• Comprehensive assays confirmed the biocompatibility and hemocompatibility of solvBG76.

Conclusions:

• The solvothermal synthesis route yields a highly bioactive glass (solvBG76) with exceptional apatite-mineralization kinetics.
• SolvBG76 demonstrates promising potential as a next-generation biomaterial for bone tissue engineering.
• The unique properties of solvBG76 contribute to its enhanced bioactivity and safety profile.