Table 1.

Clinical and radiographic findings of teeth receiving RET with BC or PRF as scaffold at 1-year Follow-up

Procedure performed	Preoperative variables				Postoperative variables at 1-year follow-up
					Radiographic findings				Sign and symptom	Sensitivity test
	Tooth# (age/sex)	Aetiology	Pulp/periapical conditions	Foramina development (Nolla’s stage)	Periapical healing	Apex closure	Root elongation	Dentinal wall thickening	Resolution	EPT/Cold test (time)
RET with a BC (average age = 11.6 y)	45 (10 y/F)	DE	AP	8	Yes	Yes	Yes	Yes	Yes	+(6 m)
	45 (12 y/M)	DE	AP	8	Yes	Yes	Yes	Yes	Yes	–
	45 (12 y/F)	DE	AP	8	Yes	Yes	Yes	Yes	Yes	–
	45 (12 y/F)	DE	AP	8	Yes	Yes	Yes	Yes	Yes	–
	11 (12 y/M)	Tooth fracture	AP	8	Yes	No	No	No	Yes	–
RET with PRF (average age = 11.4 y)	35 (10 y/M)	DE	AP	8	Yes	Yes	Yes	Yes	Yes	–
	45 (12 y/F)	DE	AP	8	Yes	Yes	Yes	Yes	Yes	+ (6 m)
	35 (12 y/M)	DE	AP	8	Yes	Yes	Yes	Yes	Yes	+ (9 m)
	45 (14 y/F)	DE	AP	8	Yes	No	No	No	Yes	–
	21 (9 y/M)	Tooth fracture	AP	8	Yes	Yes	Yes	Yes	Yes	+ (9 m)

RET regenerative endodontic treatment, BC blood clot, PRF platelet-rich fibrin, F female, M male, DE dens evaginatus, AP apical periodontitis; +, positive; −, negative