“…Three non‐brushing studies (I, II, IXa) used de novo plaque accumulation for 4, 7 or 11 days. All included studies were RCTs, 5 used a crossover design (I, II, III, IXa+b) and 5 used a parallel design (IV, V, VI, VII, VIII). All studies (except VI, VII) provide a professional prophylaxis to remove plaque, stain and calculus at baseline.…”