Table 3.

Clinical outcomes at last follow-up of the included studies

Study	Type of prosthesis	VAS improvement rate (%)	ODI score improvement	Clinical success rate (%)	Satisfaction rate (%)
Guyer et al. [17]	Charité	55.7	− 21.5	57.8	78.0
Zigler and Delamarter [50]	ProDisc	51.1	− 44.4	53.7	NA
Van De Kelft and Verguts. [43]	Maverick	61.0	− 28.55	63.0	77.0
Meir et al. [27]	AcroFlex	NA	− 15.6	NA	NA
Sköld et al. [41]	Charité, ProDisc, Maverick	63.6	− 24.6	72.5	79.0
Siepe et al. [39]	ProDisc	54.9	NA	NA	86.3
Tohmeh and Smith [42]	XL TDR	NA	NA	NA	93.3
Laugesen et al. [20]	ProDisc	52.9	NA	NA	NA
Putzier et al. [34]	Charité	NA	NA	NA	75.5
David [7]	Charité	NA	NA	NA	NA
Park et al. [29]	ProDisc	70.5	− 25.1	71.4	88.6
Lu et al. [23]	Charité	82.8	− 28.2	87.5	NA
Park et al. [31]	ProDisc	57.0	− 19.1	66.7	87.2

VAS improvement rate = (postoperative mean VAS score − preoperative mean VAS score)/(0 − preoperative mean VAS score) × 100%

ODI improvement score = postoperative mean ODI − preoperative mean ODI