WHO guideline on environmentally friendly and less invasive oral health care for preventing and managing dental caries

Overview

This WHO guideline provides evidence‑based recommendations for the safe and effective use of mercury‑free dental materials and minimal interventions to prevent and manage dental caries, in alignment with the Minamata Convention on Mercury and global oral health priorities. It evaluates the clinical effectiveness, cost‑effectiveness, toxicity and environmental impact of fluoride varnish, silver diamine fluoride, pit and fissure sealants, glass ionomer cements, resin‑based composites and related materials. The guideline incorporates GRADE‑based assessments and guiding principles—including prevention first, minimally invasive care, shared decision‑making and the precautionary principle—alongside risk‑mitigation advice for vulnerable groups and occupational safety measures. It also outlines implementation strategies, sustainability considerations and research gaps to support countries in transitioning toward mercury‑free, environmentally responsible oral health care.