Long-term follow-up shows that wider keratinized mucosa protects against peri-implant diseases, indicating importance for oral health.
A narrow KM favors plaque accumulation, mucosal recession, and peri-implant tissue inflammation in the long term, while a wider KM (≥ 2 mm) appears protective against peri-implant disease onset. Brushing discomfort declined over time irrespective of KM width.
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Deller et al. (2026) studied this question.
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