Yeah, I wanted to point out that the advantage of doing inclines or close-grips or even overheads as a main lift for a time is that generally those lifts are weaker than flat bench, so by improving them, you've improved weaker areas, then when you come back to the bench you need to re-ramp, you won't 'magically' add 50lbs to the lift, but the idea is that you've gained new strength, and with an 'adjustment period' to reacclimate to the bench and re-ramp the weights, you'll eventually bust through your old PR's.
So, technically you'll lose strength in that you probably won't be able to hit 300x3 after a month away from the lift, but it is kind of like taking a step back to take 3 steps forward.
Also, you may want to try simply deloading just the bench by slashing weight or volume or just using the dumbells one week, that might be what the Dr. ordered. There are a couple ways to approach it.