In the mildest form of the disease, called gingivitis, the gums redden, swell and bleed easily. Gingivitis is often caused by inadequate oral hygiene. Gingivitis can be reversed with treatment from a peridontist, who can provide you with advice for good oral home care. Untreated gingivitis can advance to gum disease. If a tooth has to be extracted, periodontists can also perform cosmetic periodontal procedures, such as dental implants, to help you achieve the smile you desire. Often, general dentists will refer their patients to a periodontist when their periodontal disease is advanced.