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Table 1 Interphase comparison of anterior teeth measurements (ANOVA and Friedman tests)

From: Aging changes in maxillary anterior teeth in untreated individuals: an observational longitudinal study

Variable

Teeth

T1

T2

T3

P

Mean

SD

Mean

SD

Mean

SD

Width/Height Proportion (mm)

1

0.90

0.08

0.82

0.07

0.88

0.11

0.119

2

0.84A

0.08

0.78B

0.07

0.77B

0.13

0.008 *

3

0.92A

0.10

0.81B

0.08

0.78B

0.12

 < 0.001 *

Anterior view width (mm)

1

8.44

0.53

8.39

0.49

8.30

0.61

0.090

2

6.34

0.48

6.29

0.34

6.22

0.46

0.738

3

6.50

0.60

6.47

0.55

6.40

0.57

0.433

Crown angulation (º)

1

4.95A

2.13

3.74B

1.80

2.01C

2.62

 < 0.001 *

2

6.83A

3.00

5.13B

2.54

4.67B

4.05

0.001 *

3

7.29A

5.02

5.19B

4.36

7.03AB

3.62

0.025 *

Gingival step (mm)

1–2

1.04A

0.50

0.91A

0.50

0.65B

0.53

0.002 *

1–3

1.30A

0.83

0.83B

0.82

0.15C

0.90

 < 0.001 *

Incisal step (mm)

1–2

 − 0.67A

0.33

 − 0.64A

0.33

 − 0.40B

0.42

 < 0.001 *

1–3

0.21

0.69

0.42

0.51

0.44

0.60

0.138

  1. Different letters in the same row indicate statistically significant differences by Tukey test or Durbin-Conover tests
  2. 1. central incisors; 2. lateral incisors; 3. canines. SD = Standard deviation
  3. ₳ repeated-measures ANOVA test; †. Friedman test
  4. *Statistically significant at P < 0.05