Species

Healthy implants (n = 30)

Peri-implantitis (n = 30)

Fisher’s exact test

No. of positive samples (%; frequency)

P. gingivalis

6 (20)

24 (80)

p < 0.01

T. forsythia

8 (27)

23 (77)

p < 0.01

T. denticola

5 (17)

18 (60)

p < 0.01