Low-intensity pulsed ultrasound
Low-intensity pulsed ultrasound (LIPUS) is a medical technology, generally using 1.5 MHz frequency pulses, with a pulse width of 200 μs, repeated at 1 kHz, at a spatial average and temporal average intensity of 30 mW/cm2, 20 minutes/day.
Applications of LIPUS include:
- Promoting bone-fracture healing.[1]
- Treating orthodontically induced root resorption.[2]
- Regrow missing teeth.[3]
- Enhancing mandibular growth in children with hemifacial microsomia.[4]
- Promoting healing in various soft tissues such as cartilage, inter vertebral disc.[5]
- Improving muscle healing after laceration injury.[6]
Researchers at the University of Alberta have used LIPUS to gently massage teeth roots and jawbones to cause growth or regrowth, and have grown new teeth in rabbits after lower jaw surgical lengthening (Distraction osteogenesis) (American Journal of Orthodontics, 2002). As of June 2006, a larger device has been licensed by the Food and Drug Administration (FDA) and Health Canada for use by orthopedic surgeons. A smaller device that fits on braces has also been developed but is still in the investigational stage and is not available to the public.
Lipus is used in the Exogen bone stimulator for use in acute fractures and nonunions of bone. It has not yet been approved by either Canadian or American regulatory bodies for teeth and a market-ready model is currently being prepared. LIPUS was expected to be commercially available before the end of 2012. The LIPUS foundation website currently announces that Lipus-Plasma application units are available for rental in the USA.[7] Though reports from the University of Alberta and the independent company SmileSonica indicate that the owner of the LIPUS foundation has no affiliation with the medical community.
According to Dr. Chen from the University of Alberta, LIPUS may also have medical/cosmetic benefits in allowing people to grow taller by stimulating bone growth. However it has not been shown to be able to help in bone longitudinal growth when combined with bioengineered cartilage pellets for growth plate induced fractures [8]
LIPUS has also been found to stimulate the proliferation of chondrocytes.[9]
See also
References
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- ↑ http://lipus.org/
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External links
- Canadians go ultrasonic for tooth regrowth implant Chris Williams (The Register) June 29, 2006
- Ultrasound May Help Regrow Teeth University of Alberta (Science Daily) June 28, 2006
- Low Intensity Pulsed Ultra Sound - Homepage of Mr. Matuschka's LIPUS foundation
- Low Intensity Pulsed UltraSound - LIPUS.info
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