{
    "title": "Bone Glue",
    "inventor_name": "Lin Xianfeng et al",
    "publication_year": 2025,
    "device_name": "Bone-02",
    "goal": "Rapidly repair fractured bones without the need for metal plates or screws.",
    "problem_addressed": "Current fracture fixation requires invasive surgery and permanent metal implants, leading to infection risk and foreign-body reactions.",
    "concept_summary": "A bio-inspired medical adhesive that mimics oyster cement. It can be injected into a fracture site, hardens within 2-3 minutes in a moist, blood-rich environment, bonds bone fragments with high strength, and is naturally absorbed as the bone heals.",
    "detailed_description": "Bone-02 is an organic-inorganic hybrid adhesive derived from the principles of oyster shell cement. The formulation contains calcium carbonate crystals, a cross-linked protein matrix, and water. When injected into a fracture, the adhesive reacts with physiological fluids, causing rapid crystallization and polymerization that creates a strong bond between bone fragments. Laboratory tests reported a maximum bonding force of >400 lb, shear strength of ~0.5 MPa, and compressive strength of ~10 MPa. The material is designed to be bio-resorbable, gradually degrading as new bone forms, thus eliminating the need for a second surgery for implant removal.",
    "principles": [
        "Bio-inspired adhesion (oyster cement)",
        "Calcium carbonate mineralization",
        "Protein cross-linking in moist environments"
    ],
    "scientific_domains": [
        "Materials Science",
        "Biomedical Engineering",
        "Orthopedics"
    ],
    "mechanisms_of_action": [
        "In situ crystallization of calcium carbonate on bone surfaces",
        "Cross-linked protein matrix providing mechanical cohesion",
        "Rapid hardening in the presence of blood and interstitial fluid"
    ],
    "materials": [
        "Calcium carbonate (CaCO_3)",
        "Adhes proteins (derived from oyster cement analogues)",
        "Water"
    ],
    "energy_sources": [],
    "inputs": [
        "Fractured bone surfaces",
        "Physiological fluids (blood, interstitial fluid)",
        "Bone-02 adhesive"
    ],
    "outputs": [
        "Bonded bone fragments",
        "Biodegradable residue absorbed during bone healing"
    ],
    "claimed_performance": "Bonding force >400 lb, shear strength ~=0.5 MPa, compressive strength ~=10 MPa; sets in 2-3 minutes; fully resorbable as bone heals.",
    "experimental_evidence": "Laboratory tests confirmed the mechanical strengths and setting time; one clinical trial case reported complete fixation in <3 minutes compared with traditional surgery.",
    "replication_status": "Only reported by the originating research team; no independent replication documented.",
    "keywords": [
        "Bone glue",
        "Bio-inspired adhesive",
        "Oyster cement",
        "Fracture fixation",
        "Medical glue",
        "Resorbable implant"
    ],
    "related_technologies": [
        "Oyster shell cement",
        "Medical bone adhesives",
        "Bio-composite bone cements"
    ],
    "controversy_level": "low",
    "confidence_score": 0.85,
    "practicability_score": 0.7,
    "fringe_score": 0.2,
    "evidence_strength": 0.6,
    "risk_score": 0.2,
    "trl_estimate": 5,
    "source_urls": [
        "https://interestingengineering.com/science/chinas-oyster-inspired-bone-glue",
        "https://www.globaltimes.cn/page/202509/1343380.shtml",
        "https://www.sixthtone.com/news/1017606",
        "https://pubs.acs.org/doi/abs/10.1021/ja104996y"
    ],
    "organizations": [
        "Sir Run Run Shaw Hospital",
        "Zhejiang University"
    ],
    "applications": [
        "Orthopedic fracture repair",
        "Bone fixation without metal hardware"
    ],
    "limitations": [
        "Limited clinical data; only early-stage trials reported",
        "Potential variability in performance in highly vascularized (blood-rich) sites"
    ],
    "open_questions": [
        "Long-term biocompatibility and degradation profile in humans",
        "Comparative efficacy versus standard plating/screwing techniques",
        "Scalability of manufacturing and cost considerations"
    ],
    "red_flags": [],
    "evidence_quotes": [
        "The adhesive can achieve precise fixation within two to three minutes, even in a blood-rich environment.",
        "Laboratory tests confirmed that 'Bone-02' performed strongly in both safety and effectiveness. It demonstrated a maximum bonding force of over 400 pounds, a shear strength of about 0.5 MPa, and a compressive strength of around 10 MPa.",
        "In one trial case, the procedure was completed in less than three minutes whereas traditional treatment would have required a large incision to implant steel plates and screws."
    ],
    "category": "Medical & Dental Technologies"
}