Development of A Self-Assessment Tool for Personalized Preventive Periodontal Care Among the Saudi Population Using Semi-Supervised Learning

Inclusion Criteria: * Adult aged 18 years or older * Able to read and understand the study information and provide informed consent * Able to complete the online questionnaire independently (on a smartphone/tablet/computer) * Willing to undergo a same-visit clinical periodontal examination * Has natural teeth present (dentate) Exclusion Criteria: * Completely edentulous (no natural teeth) * Currently undergoing active periodontal treatment (e.g., scaling and root planing) or received periodontal therapy within the past \[6 months\] * Took systemic antibiotics within the past \[3 months\] * Unable to complete the questionnaire or examination due to cognitive impairment, severe illness, or communication barriers that prevent informed consent * Refuses or is unable to tolerate the periodontal clinical examination