Calcium Buildup around joint

I dislocated a finger a few weeks ago. It was nasty enough. Now im left with a big buildup of calcium (i presume) around the joint and i cant really bend the finger fully. I cant play a C chord on my guitar :wink:
Any idea’s on how to help get full ROM back in the joint?

Give it more time. I have had similar injuries from basketball. Full ROM came back but it took at least 4 months.