Hydrogen-Releasing Dental Implants Improve Soft Tissue Healing
- Authors
- Yue Yuan, Zishuo Hou, Miaomiao Chen, Jingwei Yu, Minghao Zhou, Jiaxin Kang, Tengjiao Wang, Peng Li, Hongbo Wei
- Journal
- Bioactive Materials
- Year
- 2025
- DOI
- 10.1016/j.bioactmat.2025.11.018
- Study Type
- Cell Culture
- Outcome
- Positive
- Peer Reviewed
- Yes
- Country
- China
- Health Condition
- Dental Implant Complications
- Body System
- Oral
TL;DR
An implant that releases hydrogen improved soft tissue healing by reducing inflammation and promoting collagen formation and blood vessel growth.
Key Finding
A hydrogen-releasing implant reduced reactive oxygen species by 73.6% and promoted beneficial immune cell changes in laboratory conditions, while also stimulating collagen and blood vessel formation through activation of specific cellular signaling pathways.
Summary
Researchers developed a dental implant that slowly releases hydrogen gas to improve how well soft tissue (gums and surrounding tissue) integrates with the implant. The implant releases hydrogen in two phases: first, it responds to acidic conditions around the implant to reduce harmful molecules called reactive oxygen species and promote beneficial immune cells; then, it continues releasing hydrogen to support collagen formation and blood vessel growth. The study was conducted in laboratory cell cultures, not in people or animals.
Practical Takeaway
This early-stage laboratory research suggests hydrogen gas may support better implant integration by reducing inflammation and promoting tissue healing, but these findings are from cell cultures only and have not been tested in animals or humans. Much more research would be needed before this technology could be evaluated for real-world use in dental implants.
Abstract
The weaker soft tissue integration around implants compared to natural teeth poses a substantial challenge to the long-term success of implants. To enhance soft tissue integration, we develop an on-demand and long-lasting H2-releasing implant to achieve precise sequential regulation of the soft tissue integration through immunomodulation and pro-remodeling coupling. In the inflammatory phase, the system on-demand releases H2 responded to the local mild acidic microenvironment, which eliminates 73.6 % reactive oxygen species to induce M2 macrophage polarization, thereby establishing a pro-remodeling microenvironment. During the subsequent remodeling phase, the implant sustains release H2 based on the hierarchical nanostructure, effectively promoting collagen fiber formation and angiogenesis. Surprisingly, we propose that H2 can coordinately activate MAPK signaling in both gingival fibroblasts and vascular endothelial cells, coupled with stimulating pro-angiogenic paracrine of gingival fibroblasts. This implant achieves the on-demand transition of H2 release kinetics that matches the temporal progression of soft tissue integration, implying great potential of enhancing soft tissue integration.