Table 2 Mean values, standard deviation, and statistical analysis for Ca/P ratios and VHN of all groups.

From: Preventing white spot lesions around orthodontic brackets: efficacy of pre-reacted glass-ionomer barrier coat versus silver diamine fluoride: an in vitro study

(A) Mean values of (Ca/P) ratio in all groups

  

Mean ± SD

Min-Max

Ca/P Ratio

SDF

Baseline

2.08 ± 0.11

1.83- 2.43

SDF-A

1.04 ± 0.09

0.87- 1.19

SDF-B

2.00 ± 0.17

1.78- 2.47

PRG-coat

Baseline

2.06 ± 0.15

1.67- 2.45

PRG-A

1.05 ± 0.14

0.83- 1.39

PRG-B

1.9 ± 0.11

1.67- 2.11

VHN

SDF

Baseline

421.44 ± 26.45

377- 475

SDF-A

237.99 ± 36.63

172- 303

SDF-B

334.23 ± 31.28

289- 400

PRG-coat

Baseline

428.95 ± 33.87

364- 488

PRG-A

235.37 ± 28.85

187-300

PRG-B

344.81 ± 25.66

306- 387

(B) Paired T-test results for Ca/P ratio and VHN

   

T

P-Value

Ca/P Ratio

SDF

Baseline& SDF-A

28.2

0.000*

Baseline& SDF-B

1.6

0.121

SDF-A& SDF-B

21.8

0.000*

PRG-coat

Baseline& PRG-A

18.8

0.000*

Baseline& PRG-B

3.4

0.003*

PRG-A & PRG-B

18.4

0.000*

VHN

SDF

Baseline& SDF-A

19.7

0.000*

Baseline& SDF-B

11.2

0.000*

SDF-A& SDF-B

12.2

0.000*

PRG-coat

Baseline& PRG-A

25.2

0.000*

Baseline& PRG-B

15.2

0.000*

PRG-A & PRG-B

17.8

0.000*

  1. * Indicated significance.
  2. SDF-A: Untreated side of SDF gp, SDF-B: Treated side of SDF gp, PRG-A: Untreated side of PRG gp, PRG-B: Treated side of PRG gp.
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