Digital versus Analog Procedures for the Prosthetic Restoration of Single Implants: A Randomized Controlled Trial with 1 Year of Follow-Up

Table 5

Treatment time, in minutes (min), for the two different groups (digital versus analog treatment).

	Treatment procedure		p value
	Digital	Analog
Impression taking	(i) HA removal (1 min); (ii) Intraoral scan (15 min); (iii) Colour determination (3 min); (iv) HA re-insertion (1 min); Total = 20 (± 5) min; Active working time = 20 (± 5) min	(first impression); (i) HA removal (1 min); (ii) Impression taking (20 min); (iii) Colour determination (3 min); (iv) HA re-insertion (1 min); Total = 25 (± 5) min; (second impression); (i) resin crown removal (1 min); (ii) Metal coping placement (1 min); (iii) Impression taking (20 min); (iv) resin crown re-cementation (3 min); Total = 25 (± 4) min; Active working time= 50 min (± 7)	<.0001
Production of the temporary crown	(i) CAD of the individual abutment (30 min); (ii) CAD of the crown (25 min); (iii) Milling of the zirconia abutment (25 min); (iv) Sinterization of the zirconia abutment (480 min); (v) Milling of the PMMA crown (25 min); (vi) Polishing and characterization of the PMMA crown (5 min); (vii) Assembly of the individual hybrid abutment (10 min); Total = 600 min (± 45); Active working time = 70 min (± 15 min)	(i) Preparation of the temporary resin crown (120 min); (ii) Polishing and characterization of the temporary resin crown (20 min); (iii) Preparation of the metal coping (180 min); (iv) polishing of the metal coping (20 min); Total = 340 min (± 37); Active working time = 340 min (± 37)	0.0001
Delivery of the temporary crown	(i) HA removal (1 min); (ii) Insertion and activation of the individual hybrid abutment (5 min); (iii) Delivery and cementation of the temporary crown (5 min); Total = 11 min (± 5); Active working time = 11 min (± 5)	(i) HA removal (1 min); (ii) Insertion and activation of the titanium abutment (3 min); 3. Delivery and cementation of the temporary crown (5 min); Total = 9 min (± 4); Active working time = 9 min (± 4)	0.5
Preparation of the final crown	(i) CAD of the final crown (10 min); (ii) milling of the final translucent zirconia crown (25 min); (iii) sinterization of the final translucent zirconia crown (480 min); (iv)characterization of the final translucent zirconia crown (10 min); Total = 525 min (± 39); Active working time = 25 min (± 9 min)	(i) Preparation of the metal-ceramic crown (240 min); (ii) Polishing of the metal-ceramic crown (20 min); Total = 260 min (± 26); Active working time = 260 min (± 26)	<0.0001
Delivery of the final crown	(i) Removal of the temporary crown (2 min); (ii) Placement, adjustments, and final cementation of the monolithic translucent zirconia crown (12 min); Total = 14 min (± 5); Active working time = 14 min (± 5)	(i) Removal of the temporary crown (2 min); (ii) Placement, adjustments, and final cementation of the metal-ceramic crown (10 min); Total = 12 min (± 5); Active working time = 12 min (± 5)	0.5

= Student’s t-test for independent samples.
for the analog procedure, two impressions are regularly taken, one with the transfer and the other with the metal coping in position.