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Table 6 Characteristics of biofilm samples from implants with fixed and removable dentures

From: Removable denture is a risk indicator for peri-implantitis and facilitates expansion of specific periodontopathogens: a cross-sectional study

Types of prosthesis

Fixed dentures (FD)

Removable dentures (RD)

Test for significant difference

Number of implant

20

11

–

Numbers of individuals

13

3

–

Implant location: quadrants (1, 2, 3, 4)

9 (45%), 7 (35%), 2 (10%), 2 (10%)

3 (27%), 1 (9%), 5 (46%), 2 (18%)

n.s., Chi-Square Test

Implant location: maxillary

16/20 (80%)

4/11 (36%)

p = 0.015, Chi-Square Test

Implant location: left

11/20 (55%)

8/11 (72%)

n.s., Chi-Square Test

Type of replaced tooth (I, C, B, M)

0 (0%), 3 (15%), 6 (30%), 11 (55%)

4 (36%), 2 (18%), 4 (36%), 1 (9%)

-

Location of replaced toot: front

3/20 (15%)

6/11 (55%)

p = 0.020, Chi-Square Test

Implants from current smoker

0/20 (0%)

9/11 (82%)

p < 0.001, Fisher exact test

Implant age (” ± 95%CI)

7.2 ± 1.7

12.4 ± 1.1

p < 0.001, Two-Tailed T-Test

Pocket depth (” ± 95%CI)

6.3 ± 0.9

8.4 ± 1.6

p = 0.016, Two-Tailed T-Test

Gingival index (1, 2, 3)

0 (0%), 11 (58%), 8 (42%)

1 (9%), 6 (66%), 4 (36%)

-

Plaque index (0, 1, 2, 3)

1 (5%), 7 (37%), 6 (32%), 5 (26%)

0 (0%), 1 (9%), 1 (9%), 9 (82%)

-

Bad oral hygiene

5/16 (31%)

11/11 (100%)

p < 0.001, Fisher exact test

History of periodontal disease

20/20 (100%)

11/11 (100%)

n.s., Fisher exact test

Pus

10/20 (50%)

6/11 (55%)

n.s., Chi-Square Test

Pain

5/20 (24%)

1/11 (9%)

n.s., Fisher exact test

Periotron (” ± 95%CI)

116 ± 22

161 ± 21

n.s., Two-Tailed T-Test

Residual teeth

13/13 (100%)

1/3 (33%)

p = 0.025, Fisher exact test

Patient sex: man

4/13 (30%)

1/3 (33%)

n.s., Fisher exact test

Patient age (” ± 95%CI)

72 ± 3

63 ± 5

n.s., Two-Tailed T-Test

  1. n.s.—the result is not significant at p < .05