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Progress in Orthodontics

Table 2 Number of teeth per group

From: Factors influencing root resorption in retained mandibular second deciduous molars with congenital absence of second premolars: a cross-sectional study

Demographic

GC

PC

Age

  

 < 20

63

43

≧ 20

20

30

Sex

  

 Male

38

22

 Female

45

51

Dental

  

 #75

39

38

 #85

44

35

Clinical

  

 Hypodontia

56

54

 Oligodontia

27

19

Allergy

  

 Yes

20

14

 No

63

59

Mouth breathing

  

 Yes

16

15

 No

68

57

ESS

  

 < 11

70

56

≧ 11

13

17

Laterality

  

 Unilateral

33

33

 Bilateral

50

40

Caries treatment

  

 Yes

9

26

 No

74

47

Endodontic treatment

  

 Yes

3

2

 No

80

71

  1. ESS, Epworth sleepiness score; PC, poor condition; and GC, good condition
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