I broke the bone leading to the little finger of my hand about 15 years ago and had to have surgery on it. The surgeon inserted a plate with screws similar to yours.

When the cast came off I was surprised and concerned when the finger would not move AT ALL -- not even a fraction of an inch. I thought the surgeon must have fused the joint. But, when I saw him he took the finger and bent it 90degrees. It was the only time in my life that I screamed with pain. That hurt!

But he seemed completely unconcerned and reassured me: "The bone is fine -- it's just soft tissue".

He prescribed PT and OT which I attended religiously and also did the exercises on my own 5 or 10 times a day. I kept at it for a year before all of the stiffness was gone. Today, it works as well as my other uninjured finger. it is quite amazing what "soft tissue" can do and how much work it takes to get it working.

... Just my experience. I hope you find a somewhat quicker easier time of it.