Which of the following features defines toddler fracture

Toddler fractures occur in young ambulatory children (from 9 months to 3 years). A toddler&;s fracture is a spiral or oblique undisplaced fracture of the distal shaft of the tibia with an intact fibula. The periosteum remains intact and the bone is stable. These fractures occur as a result of a twisting injury. Reference: GHAI Essential pediatrics, 8th edition