Can you tell me what kind of joints are vertebral facet joints?

Spine Joints. Facet joints are places on the spinal bones where two bones actually meet and articulate, therefore a facet joint injection is into that place where they meet. Many times arthritis or inflammation can arise here and cause pain.
Small spine joints. These are situated in the back part of the spine with 2 at each level of the spine allowing for load bearing and motion to certain degrees. They are true joints just like in your arms and legs and can get the same problems. They have a joint membrane lining and joint fluid with cartilage lining.