Comparison of Radiographic Reconstruction and Clinical Improvement between Artificial Cervical Disc Replacement and Anterior Cervical Discectomy and Fusion

Table 4

Cervical sagittal alignment parameters^a.

ACDR	Preoperative	Postoperative	Follow-up	value (preop vs. postop)	value (preop vs. follow-up)	value (postop vs. follow-up)
cSVA (mm)	10.37 ± 3.816	7.906 ± 3.197	8.558 ± 3.312	0.0058^b	0.0084^b	0.0062^b
CL (°)	15.97 ± 11.55	20.58 ± 12.31	19.00 ± 11.62	0.0014^b	0.0056^b	0.0062^b
T1s (°)	20.44 ± 6.057	26.52 ± 4.954	24.79 ± 4.937	0.0022^b	0.0055^b	0.0051^b
ISH (mm)	4.200 ± 0.7466	6.726 ± 1.071	6.100 ± 0.9377	0.0078^b	0.0040^b	0.0044^b
ROM (°)	4.745 ± 2.253	10.29 ± 3.335	9.151 ± 3.133	0.0037^b	0.0053^b	0.0027^b
ACDF	Preoperative	Postoperative	Follow-up	value (preop vs. postop)	value (preop vs. follow-up)	value (postop vs. follow-up)
cSVA (mm)	12.59 ± 6.798	9.509 ± 6.582	10.40 ± 6.613	0.0085^b	0.0090^b	0.0018^b
CL (°)	15.56 ± 8.636	21.92 ± 9.998	19.96 ± 9.166	0.0046^b	0.0038^b	0.0049^b
T1s (°)	21.13 ± 5.696	27.72 ± 5.777	25.82 ± 5.477	0.0097^b	0.0036^b	0.0025^b
ISH (mm)	4.229 ± 1.177	6.408 ± 1.344	5.770 ± 1.186	0.0056^b	0.0015^b	0.0086^b
ROM (°)	5.467 ± 3.952	7.457 ± 3.797	6.846 ± 3.482	0.0157^b	0.0793	0.4234
					0.0002^c	0.0011^c

^aValues are presented as mean ± standard deviation. ^bSignificant difference between preoperative, postoperative, or follow-up values. ^cSignificant difference between ACDR and ACDF. Abbreviations: cSVA, cervical sagittal vertical axis; CL, C2-7 lordosis; T1s, T1 slope; ISH, intervertebral space height; ROM, range of motion.