This trial is to test the antibacterial effect of Guava leaves extract mouth wash compared to Chlorhexidine mouth wash in high caries risk patients.

Also salivary pH and patient satisfaction to taste will also be tested.

This study is conducted to evaluate the effect of Guava leaves extract mouth wash on anti-bacterial activity against streptococcus mutans, salivary pH and patient satisfaction to taste compared to Chlorhexidine mouth wash.

P: Population with high caries risk patients I: Intervention by Guava leaves extract mouthwash C: Control is Chlorhexidine mouthwash O1: The primary outcome is antibacterial activity. O2: The secondary outcome is salivary pH O3: The tertiary outcome is patient satisfaction to taste

Inclusion Criteria

1. High caries risk patients
2. 18-50 years
3. Healthy cooperative patients
4. Males or Females

Exclusion Criteria

1. Medically compromised patients
2. Patients with any systemic disease that might affect the salivary flow
3. Allergy to any of the ingredients
4. Patients with physical limitations that might affect normal tooth brushing and mouth rinsing
5. Presence of intraoral infections
6. Currently using any mouth rinse
7. Smokers
8. Use of antibiotics in the previous 30 days