I had a lower molar extracted a month ago. i developed a dry socket. they packed it with medicine and 3 weeks later i still see bone. healing?

Revaluation : Usually it should be healing with soft tissue covering the exposed bone. You should have the exposed bone evaluated and treatment rendered.

Dry socket: It may be the packing material. It should have been removed before this. Please return to the Dentist or specialist Oral Surgeon that placed the packing for a reevaluation.

See your Dentist: To find if it's healing or if (s)he needs to do more.