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Graphene Coatings for Biomedical Implants
Published on: March 1, 2013
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Graphene-Reinforced Titanium Enhances Soft Tissue Seal.
Jianxu Wei1, Shichong Qiao1, Xiaomeng Zhang1
1Department of Oral and Maxillo-facial Implantology, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.
Frontiers in Bioengineering and Biotechnology
|April 30, 2021
Summary
Graphene-reinforced titanium (Ti-0.125G) effectively inhibits oral pathogens and supports human gingival fibroblast growth, enhancing soft tissue seal integrity for dental implants. This material shows promise for preventing peri-implant infections.
Area of Science:
- Biomaterials Science
- Oral Microbiology
- Nanotechnology
Background:
- Soft tissue seal integrity is crucial for preventing peri-implant infections caused by bacterial biofilms.
- Graphene exhibits promising biocompatibility and antiseptic properties for biomedical applications.
- Developing advanced biomaterials is essential for improving dental implant outcomes.
Purpose of the Study:
- To synthesize and characterize a novel graphene-reinforced titanium biomaterial (Ti-0.125G).
- To evaluate the biocompatibility and antimicrobial efficacy of Ti-0.125G against oral pathogens and human gingival fibroblasts (HGFs).
- To investigate the potential of Ti-0.125G in enhancing soft tissue seal integrity and preventing peri-implant infections.
Main Methods:
- Spark plasma sintering (SPS) technique for synthesizing Ti-0.125G.
- Assessment of HGF and oral pathogen responses (Streptococcus mutans, Fusobacterium nucleatum, Porphyromonas gingivalis) to the material.
- Quantitative PCR and Illumina sequencing for evaluating bacterial biofilm dynamics.
- Co-culture models to assess selective material responses.
- Analysis of bactericidal mechanisms (electron transfer) and microbial metabolism (PICRUSt).
Main Results:
- Ti-0.125G demonstrated broad-spectrum inhibition against multiple oral pathogens, notably Porphyromonas gingivalis.
- The material exhibited favorable responses from human gingival fibroblasts, balancing microbial suppression and cell growth.
- Electron transfer was identified as the mechanism behind the material's bactericidal property.
- PICRUSt analysis predicted Ti-0.125G's potential to modulate microbial metabolism.
Conclusions:
- Graphene-reinforced titanium (Ti-0.125G) shows significant potential for dental implant applications.
- The material effectively inhibits oral pathogens while promoting favorable fibroblast responses, crucial for soft tissue seal.
- Ti-0.125G offers a promising strategy for enhancing implant stability and preventing peri-implant infections.
