Table 2.

Procedural errors: deviation from the original GE: guided endodontic post removal by a general dentist, CG: conventional post removal by a general dentist; CS: conventional post removal by a specialist canal without perforation (deviation) and perforation in the three groups

Treatment  group	Deviation  n (%)	Perforation  n (%)	Cavities prepared without procedural error  n (%)	Total n (%)
GE	4 (13.3)	-	26 (86.7)	30 (100)
CG	6 (20.0)	4 (13.3)	20 (66.7)	30 (100)
CS	11 (36.7)	6 (20.0)	13 (43.3)	30 (100)