{
    "title": "L-Arginine vs Plaque",
    "inventor_name": "Alexander Rickard",
    "publication_year": 2015,
    "device_name": "L-Arginine Biofilm Destabilization Composition",
    "goal": "Destabilize and disperse dental plaque biofilms to improve oral health and reduce cavities and gum disease.",
    "problem_addressed": "Dental plaque biofilm contributes to cavities, gingivitis, periodontitis and associated healthcare costs.",
    "concept_summary": "L-Arginine, a naturally occurring amino acid, interferes with bacterial co-aggregation and cell-cell signaling in multi-species oral biofilms, leading to reduced biofilm mass and enhanced penetration of antimicrobial agents such as cetylpyridinium chloride.",
    "detailed_description": null,
    "category": "Medical & Dental Technologies",
    "principles": [
        "Biofilm disruption",
        "Inhibition of bacterial co-aggregation",
        "Alteration of cell-cell signaling",
        "Concentration-dependent architectural changes"
    ],
    "scientific_domains": [
        "Microbiology",
        "Dentistry",
        "Biochemistry"
    ],
    "mechanisms_of_action": [
        "Inhibits bacterial coaggregation",
        "Alters bacterial metabolism",
        "Reduces extracellular polymeric substance (EPS) cohesion",
        "Promotes cell detachment from biofilm"
    ],
    "materials": [
        "L-Arginine monohydrochloride (LAHCl)",
        "Cetylpyridinium chloride (CPC)"
    ],
    "energy_sources": [],
    "inputs": [
        "Dental plaque biofilm",
        "Human saliva (cell-containing or cell-free)",
        "L-Arginine solution"
    ],
    "outputs": [
        "Reduced biofilm biovolume",
        "Increased antimicrobial penetration",
        "Altered microbial community composition"
    ],
    "claimed_performance": "Biofilm biovolume reduced up to two orders of magnitude when developed in saliva containing 100-500 mM L-Arginine; enhanced killing by CPC when combined with 500 mM L-Arginine.",
    "experimental_evidence": "Laboratory microplate and microfluidic studies showed concentration-dependent reduction of multi-species oral biofilm mass and altered species composition; addition of L-Arginine increased CPC penetration and killing.",
    "replication_status": null,
    "keywords": [
        "L-Arginine",
        "biofilm",
        "dental plaque",
        "oral health",
        "antimicrobial synergy"
    ],
    "related_technologies": [
        "Antimicrobial agents",
        "Biofilm dispersants",
        "Oral care formulations"
    ],
    "controversy_level": "low",
    "confidence_score": 0.9,
    "practicability_score": 0.7,
    "fringe_score": 0.1,
    "evidence_strength": 0.6,
    "risk_score": 0.1,
    "trl_estimate": 6,
    "source_urls": [
        "http://ns.umich.edu/new/releases/22876-naturally-occurring-amino-acid-could-improve-oral-health",
        "http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0121835"
    ],
    "organizations": [
        "University of Michigan",
        "Newcastle University",
        "Molecular Research LP"
    ],
    "applications": [
        "Oral healthcare products (toothpaste, mouthwash)",
        "Dental plaque control",
        "Medical device coating to prevent biofilm formation"
    ],
    "limitations": [
        "Exact molecular mechanism not fully elucidated",
        "Clinical efficacy pending human trials",
        "Potential taste or sensory effects at high concentrations"
    ],
    "open_questions": [
        "Long-term safety of high-dose L-Arginine in oral products",
        "Effectiveness against diverse pathogenic biofilms in vivo",
        "Optimal concentration for maximal benefit with minimal side effects"
    ],
    "red_flags": [],
    "evidence_quotes": [
        "The addition of pH neutral L-arginine monohydrochloride (LAHCl) to CFS was found to exert negligible antimicrobial effects but significantly altered biofilm architecture in a concentration-dependent manner.",
        "Under controlled flow, the biovolume of biofilms developed in saliva containing 100-500 mM LAHCl were up to two orders of magnitude less than when developed without LAHCl.",
        "Supplementing 0.01 % cetylpyridinium chloride (CPC) with 500 mM LAHCl resulted in greater penetration of CPC into the biofilms and significantly greater killing compared to a non-supplemented 0.01 % CPC solution."
    ]
}