 This is a prospective, double-blind, randomized controlled trial to determine the effectiveness of low-intensity pulsed ultrasound in decreasing the time to union of scaphoid non-unions after operative fixation as measured by serial CT scanning. Multiple centers within the Calgary zone will be involved in the study in order to recruit enough patients to power the study. Blinding will include patients, surgeons, research assistants, as well as all data handlers and analysts until trial completion or mid-term analysis. 