A 'torus' or 'buckle' fracture is the term applied for a fracture of the cortex on the non-compressive side of the bone with an intact cortex on the tension side. Torus is derived from Latin (tori) meaning a swelling or protuberance. Deformity should not occur in torus fracture because the periosteum and cortex are intact on the side of the bone opposite to fracture.

Distal end of radius featured in the image, is the most common site for a torus fracture.