| -having at least 28 teeth in the oral cavity |
-Receiving antibiotics within 3 months before the study |
| -finish RT at least one year |
-priodontitis |
| -over eighteen years |
-smoker |
| -having no newly decay of teeth after RT |
|
| -Free of systemic disease(including systemic infection) |
|
-written informed consent
|
|
Radiation caries (RC) group
|
Inclusion criteria
|
Exclusion criteria
|
| -age, sex, after RT period comparable with RCF individuals |
-receiving antibiotics within 3 months before the study |
| -having newly decay of teeth after RT(DMFT≥6) |
-priodontitis |
| -free of systemic disease(including systemic infection) |
-smoker |
| -written informed consent |
|
