Table 1 Knowledge, and clinical experience with respect to MIH diagnosis and prevalence

Are you familiar with MIH? (yes)

346 (69.2%)

 < 0.001*

If yes, how did you hear about it?

Dental Journals

7 (1.1%)

 < 0.001*

Lectures

230 (36.7%)#

Lecture notes

45 (7.2%)

Brochures or Pamphlets

4 (0.6%)

Internet

171 (27.3%)

Books

13 (2.1%)

Dental clinic/clinical supervisor

133 (21.2%)

Other students

22 (3.5%)

A friend was diagnosed with MIH

2 (0.3%)

Do you know the clinical features of MIH? (yes)

309 (61.8%)

 < 0.001*

Do you know if there are clinical criteria to diagnose MIH?

Yes, and I know how to implement them

16 (5.3%)

 < 0.001*

Yes, but I do not know how to implement them

227 (75.2%) #

No

59 (19.5%)

In clinic, do you know if you can identify a patient with MIH? (yes)

297 (59.4%)

 < 0.001*

How confident do you feel when diagnosing MIH?

Very confident

1 (0.3%)

 < 0.001*

Confident

42 (13.9%)

Slightly confident

207 (68.5%) #

Not confident at all

52 (17.2%)

Do you have difficulty-distinguishing MIH as a developmental defect of enamel that differs from other tooth conditions? (yes)

439 (87.8%)

 < 0.001*

If yes, which ones?

Dental fluorosis

134 (18.6%)

 < 0.001*

Enamel hypoplasia

382 (52.9%) #

Amelogenesis imperfecta

199 (27.6%)

Dentinogenesis imperfecta

7 (1.0%)

 < 0.001*

How often do you notice these teeth in clinic?

Weekly basis

7 (2.3%) #

Monthly basis

151 (50.0%)

Yearly basis

144 (47.7%)

Approximately what proportion of patients do you observe these teeth in?

 < 10%

156 (52.0%)

 < 0.001*

10–25%

140 (46.7%)

 > 25%

4 (1.3%) #

Which of the following features do you most frequently notice regarding severity of the defect?

White demarcation

46 (15.3%)

 < 0.001*

Yellow/brown demarcation

178 (59.1%) #

Post-eruptive enamel breakdown

77 (25.6%)

In clinic, have you encountered demarcated hypomineralized defects in permanent teeth other than the first permanent molars and incisors? (yes)

40 (13.3%)

 < 0.001*

If yes, please name the tooth/teeth

Canines

25 (62.5%) #

 < 0.001*

Premolars

13 (32.5%)

Second permanent molar

2 (5.0%)

How frequently do you notice demarcated hypomineralized lesions in the second primary molar tooth in comparison to the first permanent molar tooth?

More frequently

4 (1.3%)

 < 0.001*

Less frequently

152 (50.3%) #

The same as for the first permanent molar

5 (1.7%)

Never seen it

141 (46.7%)

Are you aware of the prevalence of MIH in Egypt? (yes)

46 (9.2%)

 < 0.001*

Do you think it would be worthwhile investigating the prevalence in Egypt? (yes)

447 (89.4%)