Healthy 22 year old daughter has delayed union progressing to non-union fracture of fibula . Fractured 10/12/2102. CT & xray images so no signs of healing . Was 5.5 weeks in a cast, NWB, 5.5 wks in a boot, some weight bearing, 4 weeks in a splint - now nothing. No pain and externally looks like a healed foot. Doc giving her 5 more weeks and then suggests surgery and repeat of whole process. She is a dancer and yoga teacher just starting her career in NY. Has been using ultrasound therapy since 7 weeks post fracture 2 x day 20 min. Good nutrition, adequate rest. Only thing we are now trying is Vit. D. and extra calcium. Can you shed any light on the WHY this would happen. Also, in your opinion, can healing occur even now. Lastly, what is percentage of success with surgery, screw, bone graft . Doc. is very very skilled, however, lack of union now gives us all pause about the outcome. Thanks