Table 3.

Complication frequency according to the group.

Teeth		Event	No event (Intact)
Group I	RCT prior to surgery	0	2
	Vital	4 new RCT (2 subsequent extraction), 1 intentional replantation after RCT	3
	Total	5	5
Group II	RCT prior to surgery	0	2
	Vital	1 new RCT	7
	Total	1	9
Group III	RCT prior to surgery	0	1 (+ 1 apical radiolucency)
	Vital	1 new RCT (1 subsequent extraction)	9
	Total	1	11

RCT (root canal treatment), Prior RCT (RCT prior to implant surgery), New RCT (RCT after surgery due to apical lesion or symptoms onset).