Well, this is usually called a Clay Shoveler's fracture, caused by sudden exertions of the muscular attachments and can be caused by flexion injuries. Most commonly occurs at C6,7 and T1.
Usually these are considered to be stable fracture with minimal incidence of spinal cord injury- unless there is another injury to the bone.
- Treatment: Once presence of segmental instability has been ruled out, Clay shoveler's fractures can be treated non operatively;
Hard collar should be worn for at least 10 days or until good flexion-extension views can be obtained; - afterwards, cervical collar is worn until good callus is present
Of course, pain control is key (with vicodin or percocet)
I wouldn't listen to your chiropractor (!)- they have minimal medical training- I would listen to your neurosurgeon. It should be healed by now. Just follow up with your neurosurgeon, get repeat xrays to make sure and get back to living your life!
what will happen to the two pieces of bone that have broken off and is there a tendon that attaches to those pieces?