I broke my hamate bone last year. While casted I wasn't able to ride my rode bike. I was able to ride my frankenstein/commute bike. It has a straight bar with Ergon grips. For about 8 weeks, it hurt terribly while riding. I often ended rides one handed.

Around week 8 I began trying my rode bike. Because of the location of the broken bone, I was in a lot of pain. I just pushed through it, but I know I wouldn't have been able to do a century on my hand.

I know each person is different. I do have a high tolerance of pain, but I definitely was frustrated with my wrist. Good luck.