Many well-meaning pet owners want to provide good dental care for their pets, but have concerns about the risks of anesthesia.  Thus, it is tempting to consider dental cleaning procedures without the use of anesthesia.  However, this is solely a cosmetic procedure that results in clean looking teeth, but cannot properly treat periodontal diseases below the gum line.  As a result, serious infection and damage to the teeth and jaw bone can develop, leaving your pet in pain, without any visible evidence.

Read this article that is representative of NAD procedures.