Predictors of osteoradionecrosis following irradiated tooth extraction

Radiation Oncology

Table 4 The association between bony changes in mandible and mandibular canal visibility with ORN post dental extraction

Variable	All extracted teeth, n (%)	Teeth with no ORN, n (%)	Teeth with ORN, n (%)	p value
Bony changes
Sclerosis	58 (36.5%)	54 (37.5%)	4 (26.7%)	0.022^a*
Resorption	9 (5.7%)	7 (4.9%)	2 (13.3%)
Mixed radiopaque-radiolucency	19 (11.9%)	14 (9.7%)	5 (33.3%)
No change	73 (45.9%)	69 (47.9%)	4 (26.7%)
Mandibular canal UCL visibility^c
Visible	54 (50.5%)	50 (54.3%)	4 (26.7%)	0.047^b*
Invisible	53 (49.5%)	42 (45.7%)	11 (73.3%)
Mandibular canal LCL visibility^c
Visible	92 (86.0%)	82 (89.1%)	10 (66.7%)	0.035^a*
Invisible	15 (14.0%)	10 (10.9%)	5 (33.3%)

UCL upper cortical line, LCL lower cortical line
^aFisher’s exact test
^bPearson chi-square test
^cLOWER incisors were not applicable to mandibular canal visibility assessment (N = 107)

ISSN: 1748-717X