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 | |