A periodontist is a dental specialist who focuses on the prevention, diagnosis, and treatment of diseases that affect the GUMS and other structures that support the teeth. The term 'Periodontist's Concerns' refers to the areas of focus for this type of dentist, which include GUMS. GUMS are the soft tissue that surrounds and supports the teeth, and they can be affected by a variety of conditions, such as gingivitis and periodontal disease. Periodontists are trained to diagnose and treat these conditions, as well as provide preventive care to help maintain healthy GUMS.