Q. Will chiropractic exercises cure a cervical region's segmental and somatic dysfunction with cervicalgia?

Hi doctor,

I recently visited a chiropractor due to neck pain. I am a dentist, so I am constantly sitting with my neck turned down. I always feel that my neck is tight and that I constantly need to crack it. I am assuming this neck pain is due to bad posture. My chiropractor took some X-rays and showed me my cervical spine. He said that it is extending forward due to bad posture. I believe this, but I am unsure about the treatment. He has yet to tell me a diagnosis, so I have been trying to diagnose myself. On his diagnosis sheet, he listed segmental and somatic dysfunction of a cervical or lumbar, or pelvic region along with cervicalgia. Because my neck is too far forward, I read that this may be due to upper cross syndrome. His treatment plan is adjustments, one neck exercise (which is my back against a block on the wall with feet slightly forward while my arms are extending then I retract my head back to the point which seems too retracted), followed by ten minutes on a roller-massage table. I have been researching this, and I feel like this exercise may not be the best, or I should be having some more hands-on treatment rather than what my current treatment plan is. Any thoughts or links to more information on cervical diagnosis or treatment would be greatly appreciated. I also have pictures of the radiographs if needed.