Biologic Functionalization of a Biphasic Bone Substitute With Enamel Matrix Derivative Modulates Early Foreign Body...

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Regenerative Medicine

Background:

• Biologic enhancement of bone grafts using enamel matrix derivative (EMD) may improve regenerative outcomes.
• EMD modulates host tissue response, potentially benefiting bone graft integration.
• Evaluating the in vivo tissue reaction to biphasic bone substitutes with and without EMD is crucial.

Purpose of the Study:

• To evaluate the in vivo tissue reaction to Maxresorb®, a biphasic bone substitute.
• To assess the combined effect of Maxresorb® and EMD on tissue response.
• To determine the biocompatibility and potential regenerative benefits of the Maxresorb® + EMD combination.

Main Methods:

• Subcutaneous implantation of Maxresorb®, EMD, Maxresorb® + EMD, or sham surgery in BALB/c mice.
• Histological and immunohistochemical analyses at 15 and 30 days post-implantation.
• Assessment of inflammation, neovascularization, fibrosis, macrophages, and biomaterial-associated giant cells (BMGCs).

Main Results:

• The Maxresorb® + EMD group exhibited higher inflammatory scores, increased macrophages and BMGCs, and enhanced neovascularization compared to controls.
• These effects were more pronounced at 30 days post-implantation.
• All tested conditions were classified as non-irritant or slightly irritant according to ISO 10993-6 standards.

Conclusions:

• The combination of EMD and Maxresorb® significantly enhanced early host tissue responses.
• The tested combination demonstrated good biocompatibility, showing no adverse effects.
• These findings support the potential regenerative benefits of biologically functionalized Maxresorb®.