Table 5.

Difficulties related to the bone transport procedure

	Single level group		Double level group		Total
	Femur	Tibia	Femur	Tibia
Problem	41	103	14	31	189
Obstacle	47	64	18	37	166
Complication	68	261	23	54	406
Problem: A potential expected difficulty that arises during the distraction or fixation period that is fully resolved by the end of the treatment period by nonoperative means.
Obstacle: A potential expected difficulty that arises during the distraction or fixation period that is fully resolved by the end of the treatment period by operative means.
Complication: Any local or systemic intraoperative or perioperative complication, a difficulty during distraction or fixation that remains unresolved at the end of the treatment period, and any early or late posttreatment difficulty.