Clinical and radiological outcomes of dynamic cervical implant arthroplasty: A 5-year follow-up

doi:10.12998/wjcc.v9.i16.3869

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World Journal of Clinical Cases

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Baishideng Publishing Group Inc, 7041 Koll Center Parkway, Suite 160, Pleasanton, CA 94566, USA

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World J Clin Cases. Jun 6, 2021; 9(16): 3869-3879
Published online Jun 6, 2021. doi: 10.12998/wjcc.v9.i16.3869

Table 1 Demographic data

Demographic
Gender (male:female)	22:18
Age (years)	45.6 (26-66)
Symptoms
Radiculopathy	18
Myelopathy	12
Both	10
Implanted level
C3/4	4
C4/5	9
C5/6	23
C6/7	10
Blood loss (mL)
Single-level	97 ± 18
Double-level	120 ± 26
Operation time (min)
Single-level	93 ± 15
Double-level	131 ± 27
Hospital day (d)	10
Ambulation after operation	2^th day
Alcohol (%)	15 (37.5)
Smoking (%)	10 (25)

Table 2 Summary of SF-36 subscores preoperatively and at five follow-up intervals

	Preop	1-mo	6-mo	12-mo	24-mo	60-mo
Physical function	54.1 ± 22.0	74.3 ± 21.2^a	77.5 ± 18.4^a	85.0 ± 24.2^a	84.4 ± 20.1^a	83.3 ± 22.1^a
Role-physical	47.5 ± 18.2	60.5 ± 20.3^a	66.3 ± 19.9^a	64.1 ± 21.0^a	64.8 ± 17.4^a	65.2 ± 18.4^a
Bodily pain	38.5 ± 12.6	70.0 ± 19.8^a	72.5 ± 21.3^a	67.5 ± 18.2^a	68.3 ± 16.4^a	67.3 ± 19.7^a
General health	41.1 ± 14.2	66.6 ± 18.4^a	72.5 ± 21.4^a	70.8 ± 15.1^a	69.3 ± 22.5^a	68.3 ± 23.4^a
Vitality	48.1 ± 19.3	68.6 ± 22.9^a	80.0 ± 16.3^a	67.5 ± 23.6^a	72.4 ± 21.4^a	70.4 ± 22.5^a
Social function	58.4 ± 21.0	77.1 ± 26.7^a	75.2 ± 19.8^a	81.3 ± 24.3^a	80.2 ± 20.7^a	81.2 ± 23.7^a
Role-emotional	37.2 ± 12.9	71.4 ± 14.3^a	73.5 ± 24.6^a	83.3 ± 23.1^a	79.3 ± 18.7^a	78.3 ± 15.7^a
Mental health	61.8 ± 18.6	75.1 ± 22.3^a	78.0 ± 19.4^a	82.2 ± 23.6^a	83.5 ± 19.2^a	84.5 ± 20.1^a

^aP < 0.05, compared with preoperative value.

Table 3 Radiographic range of motion (°), alignment (°), and intervertebral height (mm) preoperatively and at five follow-up intervals

	Preop	1-mo	6-mo	12-mo	24-mo	60-mo
C2-C7 ROM	50.2 ± 14.6	44.8 ± 12.6^a	48.2 ± 13.6	48.9 ± 13.8	49.4 ± 14.4	49.2 ± 13.7
FSU ROM	8.7 ± 3.1	6.2 ± 2.8^a	8.0 ± 2.6	8.5 ± 2.7	8.3 ± 2.5	8.0 ± 2.5
Upper adjacent level ROM	9.3 ± 4.0	7.4 ± 3.8^a	9.5 ± 3.4	9.4 ± 3.2	9.1 ± 3.0	9.0 ± 3.1
Lower adjacent level ROM	8.5 ± 3.2	7.1 ± 2.5^a	7.9 ± 2.6	8.1 ± 2.7	8.4 ± 2.9	8.8 ± 2.7
C2-C7 left lateral bending	27.9 ± 9.6	21.4 ± 5.9^a	27.3 ± 7.8	25.6 ± 8.1	26.7 ± 7.8	26.3 ± 8.1
C2-C7 right lateral bending	30.3 ± 10.2	22.6 ± 6.5^a	28.8 ± 7.6	27.3 ± 8.5	27.5 ± 7.9	26.8 ± 7.7
FSU left lateral bending	3.5 ± 1.6	1.5 ± 0.4^a	1.4 ± 0.4^a	1.2 ± 0.3^a	1.2 ± 0.5^a	1.1 ± 0.3^a
FSU right lateral bending	3.4 ± 1.6	1.6 ± 0.5^a	1.6 ± 0.6^a	1.3 ± 0.4^a	1.2 ± 0.3^a	1.0 ± 0.2^a
C2-C7 alignment	10.3 ± 9.0	13.5 ± 7.6^a	14.5 ± 8.9^a	16.3 ± 9.4^a	15.9 ± 7.8^a	16.5 ± 7.9^a
FSU angle	2.2 ± 1.6	3.4 ± 1.2^a	4.5 ± 1.9^a	5.4 ± 1.7^a	5.3 ± 1.6^a	5.5 ± 1.5^a
Intervertebral height	4.2 ± 1.2	6.0 ± 1.3^a	5.8 ± 1.6^a	5.7 ± 1.4^a	5.5 ± 1.3^a	5.2 ± 1.1^a

^aP < 0.05, compared with preoperative value. ROM: Range of motion; FSU: Functional spinal unit; FSU angle: The alignment of the operated segment.

Citation: Zou L, Rong X, Liu XJ, Liu H. Clinical and radiological outcomes of dynamic cervical implant arthroplasty: A 5-year follow-up. World J Clin Cases 2021; 9(16): 3869-3879
URL: https://www.wjgnet.com/2307-8960/full/v9/i16/3869.htm
DOI: https://dx.doi.org/10.12998/wjcc.v9.i16.3869