Because after seventy-two hours, you increase your risk of something called 'aseptic bone necrosis.'

This disease also is known, aseptic necrosis, and ischemic bone necrosis.

By the 1930s, after a number of cases of bone necrosis and death in enthusiasts, radium-containing medical products had nearly vanished from the market.

Migliorati CA: Bisphosphanates and oral cavity avascular bone necrosis.

Avascular necrosis is also called osteonecrosis, aseptic necrosis, or ischemic bone necrosis.

Avascular necrosis (aseptic bone necrosis) of the hip and other major joints, which may occur as a result of ischaemia.

But he was also afflicted with avascular bone necrosis, a condition in which diminished blood supply to the bone leads to serious weakening or destruction of tissue.

Saturation diving (or more precisely, long term exposure to high pressure) can potentially cause aseptic bone necrosis, although it is not yet known if all divers are affected or only especially sensitive ones.

When at last he returned to Earth, after his protracted convalescence in Pasteur, he promptly developed such alarming symptoms - including something suspiciously like bone necrosis - that he was immediately rushed back to orbit.

Avascular necrosis (also osteonecrosis, bone infarction, aseptic necrosis, ischemic bone necrosis, and AVN) is a disease where there is cellular death (necrosis) of bone components due to interruption of the blood supply.

His name is associated with the "Schede method", also known as "Schede's clot", a procedure that involves scraping off dead tissue in bone necrosis, allowing the cavity to fill with blood, then covering it with gauze and rubber.

The big story emerging from yesterday's report on a DNA study of King Tutankhamun and eleven other Egyptian mummies was that the boy pharaoh may have died from the combined effects of malaria and "avascular bone necrosis," or bone degeneration.

In 2010, scientists used DNA studies and CT scans to suggest that Tut, who was also inbred and sickly, died of malaria and a degenerative bone condition called avascular bone necrosis - all potentially exacerbated by a leg fracture [source: Wilford].

Although failure of chondrocyte differentiation, formation of a fragile cartilage, failure of blood supply to the growth cartilage, and subchondral bone necrosis all have been proposed as the starting point in the pathogenesis, recent literature strongly supports failure of blood supply to growth cartilage as most likely.