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Nanohydroxyapatite/Peptide Composite Coatings on Pure Titanium Surfaces with Nanonetwork Structures Using Oyster
Kuan-Hsiang Hsieh1, Hsueh-Chuan Hsu2, Yu-Lin Kao3
1Department of Surgery, Division of Orthopaedics, Zuoying Armed Forces General Hospital, Kaohsiung 813204, Taiwan.
Nanomaterials (Basel, Switzerland)
|April 12, 2024
Summary
Researchers developed novel hydroxyapatite (HA) coatings with oyster-derived peptides for titanium dental implants. These bioactive coatings significantly enhance protein adsorption, promoting better bone integration for artificial tooth roots.
Area of Science:
- Biomaterials Science
- Materials Engineering
- Biotechnology
Background:
- Titanium implants are widely used for artificial tooth roots due to their favorable mechanical properties.
- The biological inertness of titanium necessitates surface modification to improve osteointegration and bone bonding.
- Biologically active calcium-phosphorus coatings, such as hydroxyapatite (HA), are effective for enhancing implant osseointegration.
Purpose of the Study:
- To develop novel peptide-containing hydroxyapatite (HA) composite coatings for enhanced osteointegration of titanium dental implants.
- To investigate the effect of oyster shell-derived peptides on the properties of HA coatings.
- To evaluate the protein adsorption capacity of the developed composite coatings.
Main Methods:
- Osteoinductive peptides were extracted from oyster shells using acetic acid.
- Two types of peptide-containing HA coatings were synthesized: HA/P/M (hydrothermal synthesis with peptides) and HA/P/S (HA synthesis followed by peptide immersion).
- Alkali-treated pure titanium surfaces were coated, and characterization of the composite coatings was performed.
Main Results:
- Successfully prepared composite HA coatings incorporating oyster shell-derived peptides on alkali-treated titanium.
- Both HA/P/M and HA/P/S composite coatings demonstrated excellent hydrophilicity.
- Protein adsorption tests revealed approximately 2.3 times higher protein concentration on HA/P/M and HA/P/S coatings compared to pure HA coatings.
Conclusions:
- The incorporation of oyster shell-derived peptides into HA coatings enhances their biological activity.
- These peptide-modified HA coatings show improved hydrophilicity and significantly increased protein adsorption, crucial for promoting osteointegration.
- The developed composite coatings represent a promising strategy for improving the performance of titanium dental implants.
