Pulsed electromagnetic field (PEMF) stimulation has been shown to be a safe and effective treatment for non-unions of the tibia. These are fractures in which the bone has failed to unite and the healing process has ceased. The PEMF is delivered via a device such as the EBI Bone Healing System®, which straps onto the limb overlying the fracture. It is lightweight and portable using a rechargeable battery for power. It is compatible with internal and external fixation and may also be worn over a plaster or fibreglass cast. It is usually kept in place for ten hours per day and used for a period of three months or until the fracture unites. In animal models, PEMF stimulation has been demonstrated to improve the time to fracture healing in acute fractures. There have been no demonstrated side effects of the therapy.