Table 3.

Clinical studies with monolithic zirconia restorations on implants.

Authors	Zirconia System	Number/Teeth	Mean Follow-Up	Survival Rate	Complications
Cheng et al., 2017 [136]	Ceramil zi or Ceramill Zolid	Posterior single crowns: 44	2 years	2-year:	Porcelain fracture	1
				91.7% for FDPs
				100% for single crowns
		3-unit FDPs: 12			Loss of retention	1
					Screw loosening	2
					Framework fracture	1
					Opposing tooth fracture	1
Cheng et al., 2018 [137]	Ceramil zi or Ceramill Zolid	Posterior single crowns (MZ): 36	2 years	2-year:	MZ:
				97.2% for MZ	Screw loosening	1
				100% for MC	Loss of retention	0
				Complication free:	Ceramic fracture	0
		Posterior metal-ceramic (MC) crowns: 34
				97.1% for MZ	MC:
				79.4% for MC	Screw loosening	5
					Loss of retention	2
					Ceramic fracture	1
Rojas Vizcaya et al., 2018 [139]	Prettau	Double full arch fixed prosthesis: 20	2–7 years	2–7 years: 100%	Chipping of pink ceramic	1
					Screw loosening	2
Bidra et al., 2018 [140]	Pretau	Full arch fixed prosthesis: 2039	5 years	5 years: 99.3%	Prosthesis fracture	6
					Debonding of Ti cylinder	6
					Fracture of Ti cylinder	3
Degidi et al., 2018 [138]	Pretau	3-unit FDPs: 76	5 years	5 years: 97.4%	Prosthesis fracture	1
					Antagonist fracture	3
					Detachment of resin veneer of antagonist	1
					Minor chipping of antagonist	6
					Detachment of resin on screw hole	1
Worni et al., 2017 [127]	Ceramill Zolid	Single crowns: 18	12–36 months	3 year: 98.4%	Implant loss with single crown	1
		Fixed dental prostheses: 20
Levartovsky et al., 2019 [132]	Prettau (veneered and non-veneered)	Single crowns: 63	28.2 (± 16.8) months	100%	Open proximal contacts	5
Mangano et al., 2019 [141]	Not specified	Single crowns: 40	1 year	1 year: 97.5%	Implant loss	1
					hybrid abutment loss of connection	1
					zirconia abutment decementation	1
					zirconia crown decementation	1