Table 1.
The response of the monozygotic and dizygotic twin pairs to the World Health Organisation (WHO) recommended simplified structured questionnaire survey.
| Question | Response |
|||
|---|---|---|---|---|
| Monozygotic twins, No. (%) | Dizygotic twins, No. (%) | |||
| No. of participating twin pairs | 15 | 14 | ||
| During the past 12 months, did have any discomfort in your teeth or mouth ? | 9 | (60%) | 12 | (86%) |
| Do you wear removable dentures? | 8 | (53%) | 10 | (71%) |
| Would you describe the state of your teeth and gums as very good or excellent? | ||||
| • Teeth | 6 | (40%) | 6 | (43%) |
| • Gums (gingiva) | 6 | (40%) | 7 | (50%) |
| How often do you clean your teeth? | 12 | (80%) | 10 | (71%) |
| Do you use the following to oral hygiene aids to clean your teeth? | ||||
| • Toothbrush | 11 | (73%) | 9 | (64%) |
| • Toothpaste | 15 | (100%) | 14 | (100%) |
| • Fluoride-containing toothpaste | 9 | (60%) | 8 | (57%) |
| Have you ever received oral care education/counselling? | 10 | (67%) | 9 | (64%) |
| How long has it been since you last saw a dentist? | 4 | (27%) | 9 | (64%) |
| What was the reason for your last visit to the dentist? | 7 | (47%) | 7 | (50%) |
| • Routine checkup | 6 | (43%) | 3 | (25%) |
| • Treatment follow-up | 5 | (37%) | 8 | (64%) |
| Because of the state of your teeth or mouth, how often have you experienced any of the following problems during the past 12 months? | ||||
| • Difficulty in biting food | 9 | (60%) | 10 | (71%) |
| • Difficulty chewing food | 8 | (53%) | 11 | (79%) |
| • Difficulty with speech/trouble pronouncing words | 13 | (87%) | 14 | (100%) |
| • Dry mouth | 11 | (73%) | 11 | (79%) |
| • Felt embarrassed due to appearance of teeth | 10 | (67%) | 12 | (86%) |
| • Felt tense because of problems with teeth or mouth | 10 | (67%) | 13 | (93%) |
| • Have avoided smiling because of teeth | 9 | (60%) | 13 | (93%) |
| • Had sleep that is often interrupted | 9 | (60%) | 11 | (79%) |
| • Have taken days off work | 13 | (87%) | 13 | (93%) |
| • Had difficulty doing usual activities | 13 | (87%) | 14 | (100%) |
| • Felt less tolerant of spouse or people who are close to you | 11 | (0%) | 13 | (93%) |
| • Have had reduced participation in social activities | 10 | (67%) | 13 | (93%) |
| • Other | 6 | (40%) | 8 | (57%) |
| Do you prefer sugary foods? | 7 | (47%) | 7 | (47%) |
| How often do you use any of the following tobacco products? | ||||
| • Cigarettes | 12 | (80%) | 10 | (71%) |
| • Cigars | 14 | (93%) | 12 | (86%) |
| • Pipe | 14 | (93%) | 12 | (86%) |
| • Chewing tobacco | 15 | (100%) | 13 | (93%) |
| • Snuff | 15 | (100%) | 13 | (93%) |
| During the past 30 days, have you consumed alcohol? | 8 | (53%) | 10 | (71%) |
| Are you afraid of dental treatment? | 11 | (73%) | 11 | (79%) |