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.
These fractures are typically caused by vertically directed forces. Posterior iliac wing fractures that involve the weight bearing axis are unstable and may be extra-articular or involve the sacroiliac (SI) joint to some degree.hese fractures are typically caused by vertically directed forces. Posterior iliac wing fractures that involve the weight bearing axis are unstable and may be extra-articular or involve the sacroiliac (SI) joint to some degree.