temps (durée) (1) analyse statistique (1) racine (1) matériau (1) Treatment (1) Control (1) Methods (1) World health (1) Values (1) Time (1) Statistics (1) Progress (1) Petroleum (1) Periodontitis (1) Periodontal probe (1) Periodontal disease (1) Patients (1) Oils and fats (1) Months (1) Manufacturers' agents (1) Examinations (1) Essences and essential oils (1) Commission merchants (1) Chlorhexidine (1) Methods (1) Patients (1) Effectiveness (1)