Table 5 Prognostic factors for the occurrence of IORN in the lower jaw
Univariate analysis | ||
|---|---|---|
Teeth | p= | Remarks |
Dental status before starting radiotherapy | ||
Absent | 0.093 | |
Present | 0.095 | Trend |
Carious | 0.047 | Significant |
Destroyed | 0.556 | |
Loose | 0.730 | |
Root remainders | 0.247 | |
Devital | 0.688 | |
Roots – filled completely | 0.555 | |
Roots – filled incompletely | 0.774 | |
Apical periodontitis | 0.956 | |
Cysts | 0.023 | Significant |
Retained | 0.291 | |
Conservative treatment possible | 0.129 | |
No conservative treatment possible | 0.830 | |
Filled | 0.758 | |
Not sufficiently filled teeth | 0.517 | |
Teeth with not sufficient crowns | 0.897 | |
Item | ||
Chronic periodontitis with less to moderate attatchment loss | 0.572 | |
Localized | ||
General | ||
Chronic periodontitis with severe attatchment loss | 0.548 | |
Localized | ||
General | ||
Biofilm | 0.188 | |
None | ||
Moderate | ||
Intense | ||
Dental calculus and subgingival concrements | 0.188 | |
None | ||
Moderate | ||
Intense | ||
Partial prosthesis in lower jaw | 0.5254 | |
Complete prosthesis in lower jaw | 0.9026 | |
Dental treatment before radiotherapy | ||
Endodontic treatment | 0.474 | |
Removal of root remainders | 0.413 | |
Tooth extraction | 0.939 | |
Conserving treatment | 0.498 | |
Cystectomy | 0.261 | |
Healthy teeth remaining after dental rehabilitation | 0.085 | Trend |
Dental treatment after radiotherapy | 0.768 | |
Demographic and oncological data | ||
Age | 0.118 | |
Karnofsky performance status | 0.455 | |
T-stage | 0.784 | |
N-stage | O.797 | |
Total dose | 0.774 | |
BED2 | 0.410 | |
Daily fraction | 0.170 | |
Multivariate analysis | ||
Carious teeth | 0.1808 | |
Present teeth | 0.3154 | |
Odontogenic cysts | 0.0180 | Significant |
Healthy teeth remaining after dental treatment | 0.1552 | |