Â­. Â­Dry ice is frozen carbon dioxide. A block of dry ice has a surface temperature of -109.3 degrees Fahrenheit (-78.5 degrees C). Dry ice also has the very nice feature of sublimation -- as it breaks down, it turns directly into carbon dioxide gas rather than a liquid.
The time for a broken collarbone to fully heal depends on the severity of the injury. In children, complete healing may take as little as three to six weeks. In adults, six to 16 weeks or more are often necessary for a collarbone to heal solidly.
How quickly you recover depends on how serious your shoulder injury is. Separated shoulders may heal over a period of 6 weeks. Dislocated shoulders may take longer -- more like 3 to 12 weeks. But these lengths of time are just approximations. Everyone heals at a different rate.1  1. 2  2. 3  3.he same treatment would also be used for a separated shoulder. To treat either injury, you should: 1  Ice your shoulder to reduce pain and swelling. 2  Do it for 20-30 minutes every three to four hours, for 2 to 3 days or longer.