The periodontal-prosthodontic interrelationship emphasizes the critical connection between periodontal health and successful prosthetic outcomes. A healthy periodontium is essential for the longevity and function of fixed and removable prostheses. Prosthetic designs must respect the biologic width, ensure proper crown contours, and avoid overhanging margins to prevent plaque accumulation and inflammation. Occlusal forces must be carefully managed to avoid trauma to periodontal tissues. In cases of periodontal compromise, prostheses can be used to splint mobile teeth or replace lost tissue....