Hello Sniper. I just now joined this forum. I endured 3, yes 3 open heart surgeries in only 3 years. I was healthy and had no reason for heart disease at 40 years old, but on 9-18-2001 I had the first of many heart attacks. In only 4 1/2 years I had the 3 open heart surgeries, 36 heart catherizations,an experimental surgery, and on July 14, 2005 - a life saving heart transplant. I am diabetic, which did not cause this heart disease. I have a genetic abnormality. I also have a dear friend who suffers with Crohn's disease. What I can tell you is when your immune system is compromised such as in your case dealing with Crohn's, your sternum will heal slower. It took me 5-6 months after my first open heart to not be hurting so much when I sneezed. Then I had a second open heart and I thought I would never heal up. But after a YEAR of sternum pain, the doctors finally did a CT scan and it revealed the sternum had never "come together". I had a complete "non-union" of my sternum. I did have to have it repaired but neither I nor the doctors anticipated another open heart surgery was in my future.
Now, since having a heart transplant and being on immunosupressive medications, my sternum is healing very slowly. Sneezing is HORRIBLE! and it has almost been 10 months.
I believe your sternum will heal slower due to the Crohn's. Plus, health issues, healing ability, and other factors will effect the bone's healing process. Keep an eye on it and if a couple of months go by without any improvement, ask your heart surgeon about doing a CT scan to check the sternum.
Keep posting your progress! Cindy