Journal
LANGMUIR
Volume 38, Issue 4, Pages 1600-1610Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.1c03073
Keywords
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Funding
- Sao Paulo Research Foundation (FAPESP) [2019/08586-0, 2018/02186-8]
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This study demonstrates the use of metal-organic frameworks (MOFs) to strengthen and stabilize collagen fibrils in the dentin matrix. The modified dentin matrix shows superior mechanical strength and resistance to proteolysis, suggesting potential applications in restorative therapies for dental tissues.
The dentin matrix is a collagenous scaffold structurally involved in anchoring resin-based materials to the tooth. Time-dependent degradation of this scaffold at the resin-dentin interface remains a core problem in adhesive dentistry, limiting the service life of dental fillings. This study explored the use of emergent materials termed metal-organic frameworks (MOFs)-formed by the self-assembly of metal ions and organic building blocks-to safeguard the collagen integrity in the functional dentin matrix. We demonstrate that collagen fibrils (from demineralized human dentin) can induce the biomimetic growth of MOF crystals as protective coatings to strengthen and stabilize the fibrils. Zeolitic imidazolate framework-8 (ZIF-8), a zinc-based microporous MOF, was used to fabricate the MOF composites via a one-pot reaction in water. The ZIF-modified dentin matrix presented superior mechanical strength and resistance to proteolysis, which can positively affect the longevity of collagen as an anchoring substrate. This work identifies a potential biomedical application of biomimetically synthesized MOFs in repairing dental tissues critical to restorative therapies.
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