I was able to dive about 3 months after a bad bicycle crash gave me a plate and 7 screws. I still have all the hardware, and it has never bothered me at all either carrying scuba gear or my golf bag. I was walking around with doubles on that first post injury trip without any trouble.
What I was worried about the most in my rehab was range of motion. My doctor gave me a target date for being able to dive, and I scheduled a two week dive trip for two weeks after that. My plan was for technical diving, including cave diving, and I was worried that I would not be able to reach my valves with the injured limb (left side). I worked hard on range of motion exercises with that fear in mind, but when I went into the pool two weeks before the trip, I could not do it. I worked intensely those two weeks, including two very valuable massages by a masseuse who really knew her stuff, and I was just fine when I actually left for the trip.