Final answer:
A periodontist is a dental specialist who treats diseases affecting the structures surrounding the teeth, such as the gums and bones.
Step-by-step explanation:
In layman's language, a periodontist is a dental specialist who focuses on treating diseases and conditions that affect the structures surrounding the teeth, such as the gums and bones. They diagnose and treat periodontal disease, which is characterized by inflammation and damage to these structures. Periodontists work to prevent and manage oral health issues to ensure the overall health of the mouth.