Is the sacrowedgy or the dorn method effective for chronic pain?

Possibly Effective. They may be effective depending on the cause of the pain. The sacrowedgy is 'hit or miss' in that you either have a type of sacral or spinal malfunction for which it is suited, or you don't. The dorn method is more dynamic and may apply to a wider variety of dysfunctions. Your best bet is to first get a proper osteopathic diagnosis and then decide on the best type of treatment.