Experimental: Periodontal Health Intervention Group

Participants in this arm will receive comprehensive periodontal health interventions, including:~1. Full periodontal evaluation using dental mirrors and probes (assessing visible plaque, probing depth, bleeding on probing, and attachment loss).~2. Supragingival scaling, root planing, and professional plaque removal.~3. Temporary restoration of carious lesions and extraction of root remnants, as needed.~4. Personalized oral hygiene instruction, including the use of multi-tufted brushes, toothpaste, floss, and interdental brushes.

No_intervention: Standard Care Group

Participants in this arm will receive standard care without specific periodontal interventions. This includes routine medical management for myocardial infarction, as per standard clinical guidelines, without structured periodontal treatment.