For the clinical scenario of generalized gingivitis with localized gingival recession at tooth #23 caused by mechanical abrasion, what is the most appropriate INITIAL treatment?

The treatment of generalized plaque-induced gingivitis is a professional prophylaxis (scaling and polishing) combined with oral hygiene instruction. Scaling and root planing (SRP) is indicated for periodontitis, NOT gingivitis. Since there is no bone loss or attachment loss consistent with periodontitis throughout the arch, full-mouth SRP is not indicated. For the localized recession at tooth #23 caused by mechanical abrasion, the immediate priority is correcting the causative factor — switching to a soft-bristled toothbrush, adopting the modified Bass technique, and reducing brushing force. Connective tissue grafting may be considered later if recession progresses or if esthetics/sensitivity are concerns, but this is not the first-line treatment. Cause removal followed by monitoring is appropriate before any surgical intervention.