{
    "title": "Ultrasound Tooth Regeneration",
    "inventor_name": "Tarak El-Bialy et al.",
    "publication_year": 2013,
    "device_name": "Low-Intensity Pulsed Ultrasound (LIPUS) intra-oral dental regeneration device",
    "goal": "Accelerate bone and dental tissue regeneration, reduce orthodontic treatment time, and prevent tooth-root loss.",
    "problem_addressed": "Slow bone healing in cranio-maxillofacial defects, prolonged orthodontic treatment, and limited non-invasive methods for dental tissue repair.",
    "concept_summary": "A miniaturised, low-intensity pulsed ultrasound (LIPUS) system is applied to the jaw or tooth area. Acoustic pressure waves stimulate cellular mechanotransduction pathways, enhancing osteoblast/odontoblast activity, increasing blood flow and promoting new bone, dentine and cementum formation. The device can be worn intra-orally or applied externally with a transducer, delivering controlled ultrasound doses (e.g., 30-160 mW/cm^2, 1.5 MHz) for short daily sessions.",
    "detailed_description": "The technology comprises a piezoelectric ultrasonic transducer, an impedance-matching circuit, a digital controller IC (fabricated in 0.8 um high-voltage CMOS), a power-supply (battery or external adapter), and optional Bluetooth communication for treatment scheduling. Clinical and animal studies have used daily 15-20 min sessions at intensities between 30 mW/cm^2 and 160 mW/cm^2. In rat parietal bone defects, early-phase LIPUS (days 6-12) significantly increased bone thickness. In a retrospective orthodontic study (n = 34), daily 20 min LIPUS reduced total treatment time by ~49 % (~= 520 days vs ~= 1060 days). A beagle model showed enhanced periodontal bone formation and reduced inflammation. The device is intended to be custom-shaped to fit individual teeth, delivering ultrasound directly to the target tissue.",
    "principles": [
        "Acoustic pressure wave stimulation",
        "Mechanotransduction of cellular signaling",
        "Piezoelectric conversion of electrical energy to ultrasound"
    ],
    "scientific_domains": [
        "Biomedical Engineering",
        "Regenerative Medicine",
        "Dentistry",
        "Orthopedics",
        "Ultrasound Physics"
    ],
    "mechanisms_of_action": [
        "Stimulation of osteoblast and odontoblast proliferation",
        "Up-regulation of growth factors (e.g., TGF-beta1)",
        "Enhanced angiogenesis and reduced inflammation",
        "Promotion of dentine and cementum matrix deposition"
    ],
    "materials": [
        "Piezoelectric ceramic transducer",
        "High-voltage CMOS integrated circuit",
        "Gelatin membranes (experimental scaffolds)",
        "Plastic/metal shell for intra-oral housing",
        "Battery or external power supply"
    ],
    "energy_sources": [
        "Electrical power (battery or mains)",
        "Acoustic ultrasound energy (generated by transducer)"
    ],
    "inputs": [
        "Electrical voltage/current",
        "Ultrasound frequency (~= 1.5 MHz)",
        "Intensity (30-160 mW/cm^2)",
        "Treatment schedule (minutes per day, start day post-surgery)"
    ],
    "outputs": [
        "New bone formation",
        "Dentine/cementum regeneration",
        "Accelerated orthodontic tooth movement",
        "Reduced treatment duration"
    ],
    "claimed_performance": "Up to 49 % reduction in overall orthodontic treatment time; statistically significant increase in bone thickness when LIPUS applied early (days 6-12) in rat cranial defects; enhanced periodontal bone formation in beagle model.",
    "experimental_evidence": "Animal studies (rat parietal bone defect, beagle periodontal model), retrospective clinical study (34 orthodontic patients), histological and micro-CT analyses, quantitative treatment-time reduction (p < 0.05).",
    "replication_status": "Demonstrated in multiple independent animal studies and a limited clinical retrospective study; no large-scale commercial deployment reported.",
    "keywords": [
        "LIPUS",
        "low-intensity pulsed ultrasound",
        "dental regeneration",
        "bone healing",
        "orthodontic acceleration",
        "tissue engineering"
    ],
    "related_technologies": [
        "Therapeutic ultrasound devices",
        "Dental tissue engineering scaffolds",
        "Intra-oral sensors and Bluetooth control"
    ],
    "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://www.scirp.org/journal/paperinformation?paperid=29409",
        "https://www.nature.com/articles/4813802",
        "https://www.ualberta.ca/en/folio/2020/10/daily-use-of-ultrasound-can-speed-up-orthodontic-treatment.html",
        "https://www.mdpi.com/2077-0383/9/5/1303",
        "https://pmc.ncbi.nlm.nih.gov/articles/PMC3547311/",
        "https://www.sciencedirect.com/science/article/abs/pii/S0306987709004009",
        "https://pubmed.ncbi.nlm.nih.gov/23853309/",
        "https://www.frontiersin.org/journals/bioengineering-and-biotechnology/articles/10.3389/fbioe.2022.961898/full",
        "https://ieeexplore.ieee.org/document/5118289/",
        "https://www.sciencedirect.com/science/article/abs/pii/S0301562916302599",
        "https://patents.google.com/patent/CN214342694U",
        "https://patents.google.com/patent/US8292834B2"
    ],
    "organizations": [
        "University of Alberta",
        "Dalsa Semiconductor, Inc."
    ],
    "applications": [
        "Dental tissue regeneration (bone, dentine, cementum)",
        "Acceleration of orthodontic tooth movement",
        "Healing of tooth-root resorption",
        "Adjunctive therapy for periodontal disease"
    ],
    "limitations": [
        "Device size and intra-oral comfort",
        "Patient compliance with daily treatment schedule",
        "Limited long-term clinical data",
        "Regulatory approval pending for intra-oral ultrasound devices"
    ],
    "open_questions": [
        "Optimal ultrasound dose and treatment timing for humans",
        "Long-term safety of repeated intra-oral ultrasound exposure",
        "Scalability of the integrated circuit for mass production",
        "Effectiveness across diverse patient populations"
    ],
    "red_flags": [],
    "evidence_quotes": [
        "In Group 1 (day 6-12) new bone formation was significantly promoted and the newly-formed bone was thick and matured compared to the control group.",
        "Treatment duration was significantly reduced in the LIPUS group (541.44 +/- 192.23 days) compared to control group (1061.05 +/- 455.64 days) (p < 0.05).",
        "LIPUS could enhance new periodontal bone formation and bone matrix maturity in FI after GTR treatment.",
        "LIPUS promoted the repair of dentin-pulp complex injury, with more reparative dentin found on the LIPUS treatment side.",
        "The LIPUS generator is capable of producing ultrasound power up to 100 mW at the transducer's resonance frequency (1.5 MHz) with an estimated circuit efficiency of 70 %."
    ],
    "category": "Acoustics"
}