Table 8 Cross-sectional subsample of patients: injury subtypes based on previous trauma to the permanent teeth in relation to both clinical and radiographic findings at follow-up and to the distribution of these subtypes within the combined PDL + DHT injuries

PDL injuries

258

Concussion

44

17.1

0

3

2

1

3

0

1

Subluxation (mobility)

49

19.0

1

9

6

9

2

2

7

2

Lateral luxation

94

36.4

8

34

25

6

4

14

19

Extrusion

19

7.4

3

8

5

1

1

5

3

Intrusion

17

6.6

1

7

3

3

0

2

14

1

Avulsion

35

13.6

14

20

11

3

6

7

8

1

100

27

81

52

23

16

30

52†

4†

DHT injuries

152

Enamel (infraction)

4

2.6

0

Enamel (fracture)

35

23.0

1

1

2

Enamel–dentin

67

44.1

12

9

1

4

2

4

Enamel–dentin–pulp

14

9.2

4

8

7

2

5

Crown–root

27

17.8

13

3

3

6

Root

5

3.3

2

0

2

100

16

7‡

10‡

PDL + DHT injuries

159

11

61

48

7

11

13§

9§

Abbreviations in this row:

E(I)

E(F)

ED

EDP

CR

R

Total

E(I) = Enamel (infraction)

Concussion

7

19

36

3

2

1

68

E(F) = Enamel (fracture)

Subluxation

3

3

23

3

1

0

33

ED = Enamel–dentin

Lateral luxation

4

7

16

4

6

3

40

EDP = Enamel–dentin–pulp

Extrusion

3

0

1

0

0

0

4

CR = Crown–root

Intrusion

0

0

5

0

1

0

6

R = Root

Avulsion

0

5

3

0

0

0

8

Total

569

Total:

17

34

84

10

10

4

159