14.2.1 Background properties: 'background-color', 'background-image', 'background-repeat', 'background-attachment', 'background-position', and 'background'. This property sets the background color of an element, either a <color> value or the keyword 'transparent', to make the underlying colors shine through.
1 A spiral fracture happens when the break spirals around the bone, which can happen if the bone is twisted. 2  A compression fracture happens when vertebrae in the spinal column are pushed together in an accident or because of osteoporosis.
Transverse fractures are sometimes called chalkstick fractures because the broken bone has been said to resemble a broken stick of chalk. Simple oblique fractures - are those in which the break is at an angle of 30 degrees (30o) or more to the long axis of the bone. Simple spiral fractures - the line of the fracture spirals around the bone, can be due to torsional forces.