TABLE 3.
Distribution of oral treponemes detected in plaque samples by PCR analysis
| Parameter (no. of subjects) | Frequency of occurrence (%) of oral treponemes
|
|||
|---|---|---|---|---|
| T. denticola | T. vincentii | T. medium | TTa | |
| Total (50) | 68.0 | 34.0 | 48.0 | 96.0 |
| Clinical diagnosis | ||||
| Healthy subject (13) | 15.4 | 7.7 | 7.7 | 84.6 |
| periodontal disease (37) | 86.4b | 43.2b | 62.2b | 100.0 |
| Pocket probing depth (mm) | ||||
| ≤3 (13) | 15.4 | 7.7 | 7.7 | 84.6 |
| 4-5 (20) | 90.0c | 65.0c | 60.0c | 100.0 |
| ≥6 (17) | 82.4c | 17.6 | 64.7c | 100.0 |
| Gender | ||||
| Male (28) | 71.4 | 42.9 | 50.0 | 100.0 |
| Female (22) | 63.6 | 22.7 | 45.5 | 90.9 |
| Age (yr) | ||||
| ≤ 19 (6) | 0.0 | 0.0 | 0.0 | 83.3 |
| 20-39 (9) | 66.7d | 44.4 | 33.3 | 100.0 |
| 40-59 (20) | 85.7d | 42.9 | 61.9d | 100.0 |
| ≥60 (15) | 71.4d | 28.6 | 57.1d | 92.9 |
a
TT, total treponemes.
b
Significant differences (P < 0.05) in the occurrence of T. denticola, T. vincentii, and T. medium between the results for healthy subjects and the results for patients with periodontal diseases were found.
c
Significant differences (P < 0.05) in the occurrence of T. denticola, T. vincentii, and T. medium compared with the results for patients with ≤3-mm pocket probing depths were found.
d
Significant differences (P < 0.05) in the occurrence of T. denticola and T. medium compared with the results for patients aged ≤ 19 years were found.