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Table 1 Root lengths (mm) of maxillary and mandibular anterior teeth

From: Morphological analysis of anterior permanent dentition in a Chinese population using cone-beam computed tomography

  

3R

2R

1R

1L

2 L

3 L

Maxilla

V

%

351

87.5%

336

83.8%

312

77.8%

313

78.1%

338

84.3%

350

87.3%

 

BL

 

15.76 ± 1.91

 

12.22 ± 1.50

 

12.11 ± 1.67

 

12.08 ± 1.75

 

12.20 ± 1.47

 

15.59 ± 2.07

 

MD

 

17.88 ± 2.03

 

14.74 ± 1.67

 

14.66 ± 1.76

 

14.56 ± 1.81

 

14.61 ± 1.61

 

17.49 ± 2.21

 

AL

 

16.78 ± 1.94

 

13.48 ± 1.54

 

13.39 ± 1.69

 

13.32 ± 1.74

 

13.40 ± 1.49

 

16.54 ± 2.11

 

C–C

 

2.00(2.50–1.50)

 

2.52 ± 0.76

 

2.55 ± 0.67

 

2.60 (3.00–2.00)

 

2.41 ± 0.78

 

1.90 (2.40–1.40)

WD

%

13

3.2%

19

4.7%

19

4.7%

19

4.7%

14

3.5%

12

3.0%

Mandible

V

%

375

93.5%

360

90.0%

357

89.0%

362

90.3%

360

90.0%

373

93.0%

 

BL

 

14.45 ± 1.71

 

12.49 ± 1.28

 

11.31 ± 1.20

 

11.24 ± 1.17

 

12.46 ± 1.24

 

14.62 ± 1.66

 

MD

 

16.35 ± 1.76

 

14.32 ± 1.35

 

13.14 ± 1.28

 

13.15 ± 1.22

 

14.25 ± 1.32

 

16.48 ± 1.80

 

AL

 

15.40 ± 1.70

 

13.40 ± 1.27

 

12.22 ± 1.20

 

12.19 ± 1.16

 

13.36 ± 1.24

 

15.55 ± 1.70

 

C–C

 

1.80(2.30–1.50)

 

1.80 (2.20–1.80)

 

1.83 ± 0.64

 

1.88 ± 0.67

 

1.76 ± 0.68

 

1.86 ± 0.68

WD

%

4

1.0%

8

2.0%

9

2.2%

5

1.2%

7

1.7%

4

1.0%

  1. Data expressed as mean ± SD / median (percentile). V: valid; WD: wedge defect; BL: buccal-lingual root length; MD: mesial-distal root length; AL: average root length; C–C: CEJ-C; 1R/L: incisor; 2R/L: lateral incisor; 3R/L: canine; 1/2/3R: anterior teeth in the right side; 1/2/3L: anterior teeth in the left side. Normally distributed variables were reported as mean ± SD, while medians were used to describe non-normally distributed data