Eventually it will calcify, and the pain will go away. You didn't mention the pain medication being used. If it's rimadyl, then stay alert for liver problems (e.g. anorexia, nausea), and notify the Vet immediately if they occur. Other NSAIDs such as Deramaxx, and Metacam tend to be more kind towards the liver, but can still cause problems.

Since the pain is severe, hopefully they have prescribed Torbutrol short term.