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.
FIGURE 1. Undisplaced (A) and displaced (B) ï¬ake type lateral talar dome osteochondral fractures on AP radiographs. permission from Atlas of Imaging in Sports Medicine, McGraw Hill, Sydney, 2008). FIGURE 2. A, Acute undisplaced lateral talar dome osteochondral fracture on coronal CT image.