Goal
Accelerate bone and dental tissue regeneration, reduce orthodontic treatment time, and prevent tooth-root loss.
Problem
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
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
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
Energy Sources
Applications
- Dental tissue regeneration (bone, dentine, cementum)
- Acceleration of orthodontic tooth movement
- Healing of tooth-root resorption
- Adjunctive therapy for periodontal disease
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.
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