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.
Causes. A navicular fracture can be caused by a fall, severe twist, or direct trauma to the navicular bone. It can also be caused by repeated stress to the foot, creating a stress fracture unrelated to acute trauma.actors that may increase your chance of a navicular fracture include: 1  Trauma. 2  High-impact sports, such as track and field, gymnastics, tennis, or basketball. 3  Being an adolescent. 4  In women, abnormal or absent menstrual cycles. 5  Military recruits. 6  Osteoporosis or other bone conditions.