Table 1 Questionnaire used in this study

1. Age……………………

2. Gender

☐ Male

☐ Female

3. What is the daily frequency of your performing tooth brushing?

☐ 1 or less

☐ 2

☐ 3 or more

4. Do you use a toothbrush for cleaning your teeth?

☐ Yes

☐ No

5. Do you use an interdental brush for cleaning your teeth?

☐ Yes

☐ No

6. Do you use a toothpick for cleaning your teeth?

☐ Yes

☐ No

7. Do you wear dentures?

☐ Yes

☐ No

8. When is your last dental visit?

☐ Less than 1 year

☐ 1–3 years

☐ More than 3 years