There's been an epidemic of vitamin D deficiency over the last few decades because we've been avoiding the sun, Volgman says. Other reasons include having a milk allergy, following a strict vegetarian meal plan, and having darker skin (the pigment melanin reduces the skin's ability to make vitamin D from sunlight).
Sacral fractures - Denis classification. Zone 1: Region of the ala. Zone 2: Region of the sacral foramina. Zone 3: Region of central sacral canal. Provide an explanation for key principles and pertinent aspects of the classification. Provide the citation for the landmark article and recent review articles describing the classification.
In a simple fracture, also called a closed fracture, the bone breaks but there is no open wound in the skin. Simple fractures include: 1  Greenstick fracture: an incomplete fracture in which the bone is bent. 2  This type of fracture occurs most often in children. 3  Transverse fracture: a fracture at a right angle to the bone's axis. 4  Oblique fracture: a fracture in which the break is at an angle to the boneâs axis.