Root canal therapy combined with endoscopic sinus surgery for odontogenic sinusitis: Efficacy comparison in a cohort study

Table 4 Comparison of rates of complications and recurrence between two groups

Group	n	Maxillary tooth ache	Facial numbness	Facial swelling	Dry and scabbed nasal cavity	Nasal mucosa thickening	Rate of complications	Recurrence rate
Control	63	4	0	1	1	0	9.52%	12.69%
Observation	137	3	1	4	0	1	6.56%	2.91%
χ2							0.592	6.650
P value							0.441	0.009