Non-Surgical Periodontal Therapy — NDEB AFK MCQ
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Correct answer: B — To eliminate inflammation by removing aetiological factors (biofilm and calculus)
Phase I (cause-related) therapy aims to eliminate the primary aetiological factor — subgingival bacterial biofilm (and its retentive factors such as calculus, overhanging restorations, and open contacts). This includes oral hygiene instruction, scaling and root planing, caries management, extraction of hopeless teeth, and elimination of local plaque-retentive factors. Re-evaluation 4-6 weeks later determines if further surgical therapy (Phase II) is needed.
Reference: Newman – Newman and Carranza's Clinical Periodontology, 13th ed., 2019