I worked in a clinic for 4 years in California that had a chiro, his brother an orthopedic surgeon and an osteopath. Very interesting combination. But because they each had their strengths and were friends, they were able to offer our patients the best of care and good choices about their care.
I'd agree. Beware of the Chiropractor who looks at you for a few minutes and immediately determines an automatic treatment plan.
A decent Chiroprator has a more holistic approach to treat ing the whole patient, not just the immediate problem. They believe that a patients attitude and life style can have either a positive or negative effect on the healing process.
He will recommend an exercise plan to strengthen all the muscles down your spine. Getting those muscles stronger and keeping them from going into spasm will help to hold your vertebrae in their correct position. He will also help you with contributing health factors, such as stress, depression, your health history, diet, regular exercise etc., He will also take x-rays of the full spine as part of a responsible diagnosis before he starts treatment.
Appropriate "maintenance" is often necessary to keep the spine aligned correctly while the muscles surrounding the vertebrae are being strengthened. But it shouldn't be automatic. The maintenance schedule should vary depending on the patient's condition.
Hope this helps - good luck!