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Table 3 Paired t-test analysis results of SPR measurement

From: Effect of orthodontic treatment on the periapical radiolucency of endodontically treated teeth: a CBCT analysis

Variables

BO CBCT

AO CBCT

Changed

p—value

Average(mm) \(\pm\) SD

Average(mm) \(\pm\) SD

Average(mm)

Sex

 Male (n = 39)

2.40 \(\pm\) 1.39

2.62 \(\pm\) 1.57

0.22

0.218

 Female (n = 76)

2.57 \(\pm\) 1.55

2.30 \(\pm\) 1.28

-0.27

0.036

Age

 10 – 19 (n = 23)

3.01 \(\pm\) 2.03

2.66 \(\pm\) 1.73

-0.35

0.264

 20 – 29 (n = 63)

2.44 \(\pm\) 1.38

2.28 \(\pm\) 1.27

-0.16

0.251

 30 – 39 (n = 21)

2.03 \(\pm\) 0.84

2.23 \(\pm\) 1.21

0.20

0.262

\(\ge\) 40 (n = 8)

2.94 \(\pm\) 1.44

3.20 \(\pm\) 1.48

0.25

0.203

Orthodontic treatment period (Months)

 0 – 24 (n = 26)

2.54 \(\pm\) 1.58

2.37 \(\pm\) 1.26

-0.16

0.430

 24 – 36 (n = 41)

2.76 \(\pm\) 1.61

2.58 \(\pm\) 1.45

-0.18

0.211

 36 – 48 (n = 18)

1.93 \(\pm\) 0.81

2.24 \(\pm\) 1.52

0.31

0.210

\(\ge\) 48- (n = 30)

2.52 \(\pm\) 1.52

2.31 \(\pm\) 1.36

-0.21

0.451

CBCT interval (Months)

 12 – 24 (n = 19)

2.49 \(\pm\) 1.57

2.59 \(\pm\) 1.38

0.10

0.575

 24 – 36 (n = 36)

2.67 \(\pm\) 1.71

2.47 \(\pm\) 1.50

-0.20

0.160

 36 – 48 (n = 26)

2.43 \(\pm\) 1.36

2.08 \(\pm\) 1.45

-0.34

0.205

 48 – 60 (n = 9)

2.06 \(\pm\) 1.03

2.70 \(\pm\) 1.49

0.64

0.112

 60 – 72 (n = 10)

2.03 \(\pm\) 0.86

1.97 \(\pm\) 0.89

-0.07

0.850

\(\ge\) 72 (n = 15)

2.94 \(\pm\) 1.63

2.74 \(\pm\) 1.20

-0.21

0.639

Type of tooth

 Anterior (n = 37)

2.55 \(\pm\) 1.20

2.44 \(\pm\) 1.35

-0.10

0.592

 Premolar (n = 11)

2.22 \(\pm\) 1.24

1.89 \(\pm\) 1.76

-0.33

0.178

 Molar (n = 56)

2.61 \(\pm\) 1.76

2.60 \(\pm\) 1.53

-0.02

0.901

Position of tooth

 Maxillary (n = 71)

2.54 \(\pm\) 1.43

2.29 \(\pm\) 1.33

-0.25

0.040

 Mandibular (n = 44)

2.47 \(\pm\) 1.60

2.60 \(\pm\) 1.46

0.13

0.504

Canal obturation quality

 Good (n = 75)

2.59 \(\pm\) 1.71

2.50 \(\pm\) 1.53

-0.08

0.561

 Moderate (n = 18)

2.58 \(\pm\) 1.16

2.40 \(\pm\) 1.56

-0.18

0.459

 Poor (n = 18)

2.32 \(\pm\) 0.73

2.32 \(\pm\) 1.35

-0.00

0.995

 No canal obturation (n = 4)

2.03 \(\pm\) 0.85

2.05 \(\pm\) 1.07

0.02

0.889

Whether used as an anchor

 Yes (n = 30)

2.37 \(\pm\) 1.31

2.26 \(\pm\) 1.18

-0.11

0.584

 No (n = 80)

2.58 \(\pm\) 1.59

2.44 \(\pm\) 1.46

-0.15

0.251

 Unknown (n = 5)

2.27 \(\pm\) 0.75

2.83 \(\pm\) 1.48

0.56

0.418

  1. SPL Size of the periapical lesion
  2. CBCT Cone-beam computed tomography
  3. BO CBCT CBCT images before orthodontic treatment
  4. AO CBCT CBCT images after orthodontic treatment
  5. * Paired t-test / Bold and underline values indicate statistically significant differences (p < 0.05)