Is it possible to have a hairline fracture and still be able move the joint?

Yes, it is possible to have a hairline fracture and still be able to move the joint. This is because a hairline fracture is a very thin crack in the bone that does not completely separate the bone into two pieces. As a result, the bone is still able to bear weight and allow for movement of the joint. In most cases, hairline fractures will heal on their own within a few weeks. However, if the fracture is in a weight-bearing bone or if the bone is not properly immobilized, it may take longer to heal or may not heal properly.