Hi Claire
Sorry to hear that you were injured and hope you are well on the way to recovery. It is never a good idea to keep entire Males together in one household and even having them castrated may not solve your problem now there has already been an altercation between them. Has your bitch now been spayed? If not there could be more trouble to come when she next comes in season. Large dogs can inflict a lot of damage on each other and their usual devotion to their owners can sometimes go out the window when in the frenzy of a fight, resulting in owners being injured also.
I do wish you luck with these two, not a position I would like to be in as they get older.

Leah