Allantoin Acid rain 1 Adolescent 1 Adult 1 Aged 1 Chlorhexidine 1 Dexpanthenol 1 Environmental pollution 1 Female 1 Fungi 1 Gingivitis 1 Heavy metals 1 Humans 1 Laboratory experiments 1 Male 1 Metabolites 1 Metallic contamination 1 Middle Aged 1 Mouthwash 1 Mouthwashes 1 Patient Satisfaction 1 Periodontal Diseases 1 Periodontal-disease-index 1 Plant families 1 Simulated acid rains 1 Tooth Discoloration 1 Toothpaste 1 Toothpastes 1 Treatment Outcome 1 Young Adult 1