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Table 4 Mann–Whitney U-tests for intragroup comparisons

From: The effects of amalgam contamination and different surface modifications on microleakage of dentin bonded to bulk fill composite when using different adhesive protocols

Group

Median (IQR = Q3-Q1)

Range

p-value

Control

Etch-and-rinse

4.00 (2.25)

1–4

p = 0.043*

Self-etch

2.00 (0.5)

1–3

CHX

Etch-and-rinse

3.00 (3)

1–4

p = 0.684

Self-etch

2.00 (3)

1–4

DR

Etch-and-rinse

4.00 (0)

4–4

p < 0.001*

Self-etch

1.50 (2)

0–4

NT

Etch-and-rinse

3.50 (3)

1–4

p = 0.436

Self-etch

2.50 (3)

0–4

  1. ER etch-and-rinse, SE self-etch, CHX 2% chlorhexidine treatment, DR dentin refreshment, NT no treatment
  2. *Statistically significant difference (p < 0.05)
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BMC Oral Health

ISSN: 1472-6831

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