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.
There are two types of labral tears. A primary or type 1 tear occurs due to a fraying or detachment of the labrum from the rim of the acetabulum. A type 2 tear is a tear within the substance of the labrum, typically caused crushing of the labrum against the neck of the femur by an overhanging rim of the acetabulum (pincer lesion). Code 29916 (Arthroscopy, hip, surgical; with labral repair) describes arthroscopic repair of the torn labrum.