. 2019 Jul 14;7(13):2173–2181. doi: 10.3889/oamjms.2019.588

Table 1.

Eligibility criteria of the trial

Inclusion Criteria for participants:	Exclusion criteria for participants:
1. Patients included in this clinical trial were at least18 years old. 2. Patients were free from any systemic disease that may affect normal healing and predictable outcome. 3. Patients agreed to the informed consent and committed to follow-up period. 4. Refrained from tobacco products and any coloured liquids or food (e.g. coffee, tea, tomato sauce, etc.) during the active study period.	1. Patients with any systemic disease that may affect normal healing. 2. Patient with bad oral hygiene. 3. Pregnant females. 4. Patients who could not participate in the follow-up period. 5. Untreated, periodontal diseases were not allowed. 6. Active caries or defective Restorations in six anterior teeth. 7. Sensitive Teeth. 8. Bleaching history. 9. Patients are participating in more than 1 dental study.

Inclusion Criteria for participants:

Exclusion criteria for participants:

1. Patients included in this clinical trial were at least18 years old.
2. Patients were free from any systemic disease that may affect normal healing and predictable outcome.
3. Patients agreed to the informed consent and committed to follow-up period.
4. Refrained from tobacco products and any coloured liquids or food (e.g. coffee, tea, tomato sauce, etc.) during the active study period.

1. Patients with any systemic disease that may affect normal healing.
2. Patient with bad oral hygiene.
3. Pregnant females.
4. Patients who could not participate in the follow-up period.
5. Untreated, periodontal diseases were not allowed.
6. Active caries or defective Restorations in six anterior teeth.
7. Sensitive Teeth.
8. Bleaching history.
9. Patients are participating in more than 1 dental study.