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Erschienen in: Journal of Orthopaedic Surgery and Research 1/2015

Open Access 01.12.2015 | Research article

Clinical and radiological outcomes following hybrid surgery in the treatment of multi-level cervical spondylosis: over a 2-year follow-up

verfasst von: Ji-Sheng Shi, Bin Lin, Chao Xue, Hai-Shen Zhang, Zhi-Da Chen, Zhong-Sheng Zhao

Erschienen in: Journal of Orthopaedic Surgery and Research | Ausgabe 1/2015

Abstract

Background

The optimal surgical approach for treatment of multi-level cervical disc disease is currently widely debated. Anterior cervical discectomy and fusion (ACDF) combined with cervical disc arthroplasty (CDA) has been presented as a treatment approach, but to date, there are few reports with adequate clinical and radiological data for this hybrid surgical procedure. The goal of this paper is to assess clinical and radiological outcomes in patients with cervical spondylosis in three contiguous segments after treatment with artificial disc replacement combined with fusion.

Materials and methods

We performed a retrospective review of 36 patients (mean age of 48.6 years) with contiguous three-level cervical spondylosis who were treated with ACDF coupled with CDA (hybrid surgery) between October 2008 and October 2012. Clinical evaluation was based on the Neck Disability Index (NDI), Japanese Orthopaedic Association (JOA) score, and postoperative JOA score improvement rate (IR). Radiographic parameters, angular range of motion (ROM) for C2-C7, and ROM for the superior and inferior adjacent segments were measured before the operation, at 1, 3, 6, and 12 months postoperation, and at the final follow-up evaluation. All cases were followed for at least 28 months (range 28–65 months).

Results

All patients exhibited significant postoperative improvement in NDI and JOA scores compared to preoperative levels (P < 0.05), and these improved scores were maintained during the follow-up period. The JOA score improvement rate was 70.83 % at the final follow-up evaluation. The mean C2-C7 ROM of all cases was significantly decreased immediately after operation but recovered to preoperative levels after 12 months (P = 0.721). The ROM of the superior and inferior adjacent segments was recovered to preoperative levels after 6 months (P > 0.05). One patient required a second surgery for symptomatic adjacent segment degeneration. Neither pseudarthrosis nor other device migration was observed in any patients during the entire follow-up period.

Conclusions

These results indicate that hybrid surgery seems to be a promising, acceptable, and alternative surgical approach for the treatment of multi-level cervical disc disease.
Hinweise

Competing interests

The authors declare that they have no competing interests.

Authors’ contributions

SJS and LB made a contribution to designing the study and providing critical revisions to this article. XC and ZHS were responsible for writing the article and acquiring the data. CZD and ZZS made a contribution to collecting the data and performed the statistical analysis. All authors read and approved the final manuscript.

Introduction

Cervical spondylosis is a common pathological condition that results from cervical spine degeneration and has been shown to cause significant disability and loss of productivity [1]. Research on the surgical treatment of cervical disease has mainly focused on the surgical approach, decompression method, and selection of internal fixation. For the surgical management of cervical degenerative disc disease, spine surgeons have explored anterior surgical approaches, such as anterior cervical discectomy and fusion (ACDF), anterior cervical corpectomy and fusion (ACCF), and cervical disc arthroplasty (CDA), and posterior surgical approaches, such as laminectomy and laminoplasty [2, 3].
Over the past few decades, ACDF has proven to be an effective and acceptable treatment for single- or double-level cervical spondylosis [4]. Nevertheless, ACDF may cause long-term complications, such as activity loss in the surgery segment, which may lead to a higher incidence of adjacent segment degeneration and segmental instability [5]. Furthermore, for patients with multi-level cervical degenerative disc disease, multi-level fusion is more likely to lead to adjacent segmental disease, challenging fusion, and frequent pseudarthrosis [6]. Therefore, CDA was developed to preserve the activity of the surgical segment and to restore the normal biomechanics of the cervical spine [7]. To date, however, there have been few reports on the biomechanical effect of CDA involving three or more levels, and its clinical indications and contraindications are unclear.
Currently, artificial disc replacement combined with fusion (hybrid surgery) has been presented for the treatment of multi-level cervical disease [8]. Unfortunately, there are few clinical data concerning the efficacy of hybrid surgery for the treatment of this disease and the effect of the combined procedure on adjacent segments. There is also a lack of significant data reporting the clinical indications and contraindications of hybrid surgery for multi-level cervical disease, in spite of its significant advantages [9, 10]. We have performed hybrid surgery for the treatment of multi-level cervical disc disease since 2008. This study was conducted to review the clinical efficacy of the surgery and to investigate surgical key points and indications in patients treated with artificial disc replacement combined with fusion.

Materials and methods

This study protocol was approved by the Research Ethics Board of our institution. Informed consent was obtained from all patients. This study included 36 patients (21 males and 15 females) with age ranging from 39 to 60 years (mean age 48.6 years), who were seen between October 2008 and October 2012 for cervical disc disease involving three contiguous segments. Patients with obvious cervical instability, osteoporosis, significant cervical anatomical deformity, or active infection were excluded. Fusion or CDA was determined preoperatively by anterior-posterior and lateral flexion-extension radiographs, computed tomography (CT) scans, and magnetic resonance imaging (MRI).
Nine operations were performed with one ProDisc-C disc prosthesis (Synthes Spine, West Chester, PA, USA) and two cages (Stryker, Kalamazoo, MI, USA); 18 operations with two disc prostheses and one ZERO-P (Synthes Spine, West Chester, PA, USA); and nine operations with two disc prostheses and one cage. In one case, the ProDisc-C arthroplasty was performed at C4/C5 and C6/C7, and the ZERO-P was implanted at C5/C6 (Fig. 1).
Data collected included patient demographics and pre- and postoperative information (age, sex, levels, symptoms, follow-up duration, operation time, blood loss, and hospital stay). Clinical evaluation was based on the Neck Disability Index (NDI), Japanese Orthopaedic Association (JOA) score, postoperative improvement rate, radiographic parameters, and angular range of motion (ROM) for C2-C7 and for the superior and inferior adjacent segments. The postoperative improvement rate (IR) was defined as (b − a)/(17 − a) × 100 %, where a indicates the preoperative score, b indicates the postoperative score, and 17 indicates a normal score [11]. The ROM was measured by the difference in pre- and postoperative Cobb angles as measured at the 1-, 3-, 6-, 12-month, and final follow-up examinations.

Operative technique

All surgical operations were performed with patients placed in a supine position with the head extended. Controlled general anesthesia was administered, and endotracheal intubation was performed for all patients. First, ACDF was used for the fusion segment through a standard right-sided anterior approach, as described in previous report [12]. Extensive decompression was performed, with removal of the disc tissue, hyperplastic posterior longitudinal ligament, and posterior osteophytes. A cervical interbody fusion cage or ZERO-P was used. Subsequently, replacement segments were operated upon to implant the ProDisc-C artificial disc prosthesis. After the operation, all patients were allowed to wear a neck collar for 4 weeks and to undergo proper functional exercise.

Statistical analyses

Statistical analyses were conducted using SPSS software, version 19.0 (SPSS Inc, Chicago, IL, USA). Continuous variables are presented as means ± standard deviation (SD). JOA, NDI, and ROM scores were analyzed by Student’s t test. Statistical significance was set at P value <0.05.

Results

We operated on a total of 108 levels, including 63 replacement segments and 45 fusion segments. All operations were successful. All cases were followed postoperatively for at least 28 months (range 28–65 months). The demographics and pre- and postoperative data of the 36 patients are presented in Table 1.
Table 1
Summary of the demographics and surgery details
Variable
Details
No. of patients, n a
36
Mean age at surgery (range), yearsb
48.64 ± 5.28 (39–60)
Sex (M/F, cases)a
21/15
Symptoma
 
 Myelopathy
19
 Radiculopathy
14
 Both
3
Levelsa
 
 C3-C4, C5-C6 CDA; C4-C5 ACDF
8
 C4-C5, C5-C6 CDA; C6-C7 ACDF
8
 C4-C5, C6-C7 CDA; 5-C6 ACDF
16
 C4-C5 CDA; C5-C6, C6-C7 ACDF
4
Mean operation time (range), minb
121.17 ± 16.74 (95–160)
Mean blood loss (range), mlb
299.58 ± 66.82 (210–500)
Mean follow-up (range), monthsb
41.11 ± 8.82 (28–65)
Hospital stay (range), daysb
10.00 ± 2.70 (6–15)
ACDF anterior cervical discectomy and fusion, CDA cervical disc arthroplasty
aData are displayed as a number
bData are displayed as means ± standard deviation
The mean NDI and JOA scores for all cases improved significantly after surgery (P < 0.05) and were maintained at favorable levels within the follow-up period. The JOA score improvement rate was 70.83 % at the final follow-up examination. The data trends show a rapid decrease in the NDI scores and a rapid increase in the JOA scores immediately after surgery and a slow change in these scores during the follow-up period (Table 2).
Table 2
Pre- and postoperative NDI, JOA scores, and JOA scores IR (means ± standard deviation)
 
Preoperative
Postoperative follow-up
1 month
3 months
6 months
12 months
Last follow-up
NDI (%)a
61.17 ± 3.54
33.61 ± 3.17
30.53 ± 2.91
23.86 ± 2.54
21.08 ± 2.30
18.64 ± 2.73
JOAa
9.39 ± 0.84
12.14 ± 1.36
12.44 ± 1.36
13.47 ± 1.08
14.19 ± 1.19
14.78 ± 1.27
JOA IRb
 
36.14
40.08
53.61
63.07
70.83
NDI Neck Disability Index, JOA Japanese Orthopaedic Association, IR improvement rate
aData are displayed as means ± standard deviation
bData are displayed as a percentage
Radiological evaluation was conducted by a senior spine surgeon who was not familiar with the patients’ situations to avoid information bias and reduce errors. An average ROM was calculated from three repeated measurements. The mean preoperative C2-C7 ROM of all cases was 46.39 ± 2.41°, and the postoperative mean values were 27.58 ± 5.82°, 31.78 ± 5.82°, 36.03 ± 4.93°, 46.03 ± 4.64°, and 47.50 ± 4.59° at the 1-, 3-, 6-, 12-month, and final follow-up examinations, respectively (Table 3). As shown in Table 3, cervical motion was significantly limited immediately after operation and was subsequently recovered to preoperative levels after 12 months (P = 0.721).
Table 3
Pre- and postoperative ROMs of C2-C7 and the superior and inferior adjacent segments
 
Preoperative
Postoperative follow-up
1 month
3 months
6 months
12 months
Last follow-up
C2-C7 ROM (°C)
46.39 ± 2.41
27.58 ± 4.27*
31.78 ± 5.82*
36.03 ± 4.93*
46.03 ± 4.64
47.50 ± 4.59
SAS ROM (°C)
14.25 ± 1.81
6.56 ± 1.86*
9.67 ± 2.74*
14.03 ± 1.46
14.58 ± 1.34
15.00 ± 1.15
IAS ROM (°C)
10.89 ± 1.65
6.75 ± 1.70*
8.81 ± 2.16*
10.75 ± 2.37
11.06 ± 1.91
11.47 ± 1.84
Data are displayed as means ± standard deviation
ROM range of motion, SAS superior adjacent segment, IAS inferior adjacent segment
*Comparison between pre- and postoperative: P < 0.05
The ROMs of the superior and inferior adjacent segments were significantly decreased 1 month postoperation (P < 0.05). By contrast, the ROMs at 6, 12, and 24 months postoperation did not differ significantly from the preoperative ROMs, indicating that the ROMs returned to preoperative levels after 6 months (P > 0.05) (Table 3).
During the follow-up period, heterotopic ossification occurred in three patients without the need for further intervention. Symptomatic adjacent segment degeneration was encountered in two cases, and one of these required a second surgical treatment. Lateral radiographs showed a mild disc prosthesis migration (<3 mm) in two patients without obvious symptoms at the 6-month follow-up examination. No pseudarthrosis or other device migration was seen during the follow-up period. Vertebral stability and implant fusion were satisfactory in all cases at the last follow-up examination.

Discussion

While ACDF continues to be the gold standard for the treatment of single- or double-level cervical spondylosis [4], it has been shown to alter spinal biomechanics, restrict intervertebral activity of the segment at the surgical level, and increase the rate of adjacent segment degeneration in a large number of cases [1315]. Furthermore, several studies [16, 17] have indicated that challenging fusion and pseudarthrosis are more likely to occur when multiple segments undergo operative fusion, especially for three or four levels. Hence, there is a need for alternative surgical methods that can preserve segmental flexibility of the operative levels and reduce adjacent segment degeneration. Many researchers have reported that CDA is an effective alternative procedure that achieves equivalent or superior clinical and radiographic results compared to ACDF [9, 18]. Coric et al. [19] reported that CDA-treated patients (136 cases) had a lower incidence of adjacent segment degeneration compared to ACDF-treated patients (133 cases) in a randomized controlled trial with a minimum 2-year follow-up. Unfortunately, higher surgical requirements and increased prosthesis-related complications precluded its use in patients with multi-level CDA.
Currently, there is debate over the optimal surgical protocol for the treatment of cervical spondylosis involving three or more levels. CDA coupled with ACDF (hybrid surgery) considerably reduced the incidence of complications from multi-level fusion and largely preserved the physiological curvature of the cervical spine [8]. Sasso et al. [20] suggested that hybrid surgery not only maintains cervical activity after ACDF and avoids segment degeneration but also makes up for a lack of use of CDA. One study [9] indicated that hybrid surgery was comparable to ACDF and CDA in terms of safety and feasibility after conducting follow-up patient evaluations for a minimum of 2 years.
In the present study, 36 patients showed obvious improvements in postoperative NDI and JOA scores compared to preoperative scores. JOA score IRs were particularly high at the last follow-up evaluation (70.83 %). Neurological recovery during the follow-up period varied among patients but was satisfactory overall. The outcomes of this current study are very similar to those of a study by Shin et al. [21], who reported that hybrid surgery involving two segments resulted in a favorable recovery of NDI scores and eased neck and shoulder pain. Accordingly, we may reasonably conclude that the hybrid constructs offered favorable nerve root decompression and relieved neural symptoms.
Radiographic examinations showed that surgical segments were stabilized postoperatively and that the height of the intervertebral space of the replacement segments was basically consistent with the adjacent segments. Moreover, cervical spine motor function, C2-C7 ROM, and ROM of the superior and inferior adjacent segments were maintained at acceptable levels. The mean C2-C7 ROM, which was 46.39 ± 2.41° before the operation, was recovered after 12 months (46.03 ± 4.64°) and was maintained at the last follow-up evaluation (47.50 ± 4.59°). We noted that the ROM of the superior and inferior adjacent segments, which was 14.25 ± 1.81° and 10.89 ± 1.65° before the operation, respectively, was recovered after 6 months (14.03 ± 1.46° and 10.75 ± 2.37°, respectively) and increased at the last follow-up evaluation (15.00 ± 1.15° and 11.47 ± 1.84°, respectively). Although disc prosthesis migration was observed in two patients (<3 mm), there were no corresponding clinical signs or symptoms. In our study, one patient required a secondary operation for adjacent segment degeneration, possibly caused by an increased load of adjacent segment intervertebral activity after two-cage fusion.
Based on previous research and surgeons’ clinical experience with ACDF and CDA, clinical indications and contraindications have been drafted for these treatments [8]. CDA is considered a reasonable option for patients with a simple herniated disc without significant joint instability or facet joint degeneration, in particular young and middle-aged patients (less than 60 years old). On the contrary, ACDF or ACCF is preferable when the degree of intervertebral joint activity is restricted to 3°, with or without joint degeneration, to avoid heterotopic ossification. Other contraindications for CDA include obvious degeneration in segments adjacent to the surgical level, disc calcification, extensive spinal stenosis with osteophyte formation in the posterior of the vertebral body, and ossification of the posterior longitudinal ligament.
In this study, patients demonstrated satisfactory recovery of neurological function and favorable imaging results. This study had a large sample size of 36 patients with cervical spondylosis involving three contiguous segments, who were treated with hybrid surgery with a minimum follow-up period of 28 months. The major limitations of this study were its retrospective nature and the lack of a control group. Therefore, future studies with long-term follow-up and a control group with ACDF or CDA are necessary.

Conclusions

Hybrid constructs can achieve thorough decompression of lesion segments, preserve the activity of non-fusion segments, and reestablish spinal stability. These results indicate that hybrid reconstructive techniques seem to be a promising, acceptable, and alternative approach for the treatment of multi-level cervical disc disease.

Role of the funding source

There are no sources of funding involved in this paper.
Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://​creativecommons.​org/​licenses/​by/​4.​0/​), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://​creativecommons.​org/​publicdomain/​zero/​1.​0/​) applies to the data made available in this article, unless otherwise stated.

Competing interests

The authors declare that they have no competing interests.

Authors’ contributions

SJS and LB made a contribution to designing the study and providing critical revisions to this article. XC and ZHS were responsible for writing the article and acquiring the data. CZD and ZZS made a contribution to collecting the data and performed the statistical analysis. All authors read and approved the final manuscript.
Literatur
1.
Zurück zum Zitat Schoenfeld AJ, George AA, Bader JO, Caram Jr PM. Incidence and epidemiology of cervical radiculopathy in the United States military: 2000 to 2009. J Spinal Disord Tech. 2012;25(1):17–22.PubMedCrossRef Schoenfeld AJ, George AA, Bader JO, Caram Jr PM. Incidence and epidemiology of cervical radiculopathy in the United States military: 2000 to 2009. J Spinal Disord Tech. 2012;25(1):17–22.PubMedCrossRef
2.
Zurück zum Zitat Witwer BP, Trost GR. Cervical spondylosis: ventral or dorsal surgery. Neurosurgery. 2007;60(1 Supp1 1):S130–6.PubMed Witwer BP, Trost GR. Cervical spondylosis: ventral or dorsal surgery. Neurosurgery. 2007;60(1 Supp1 1):S130–6.PubMed
3.
Zurück zum Zitat Pereira EA, Chari A, Hempenstall J, Leach JC, Chandran H, Cadoux-Hudson TA. Anterior cervical discectomy plus intervertebral polyetheretherketone cage fusion over three and four levels without plating is safe and effective long-term. J Clin Neurosci. 2013;20(9):1250–5.PubMedCrossRef Pereira EA, Chari A, Hempenstall J, Leach JC, Chandran H, Cadoux-Hudson TA. Anterior cervical discectomy plus intervertebral polyetheretherketone cage fusion over three and four levels without plating is safe and effective long-term. J Clin Neurosci. 2013;20(9):1250–5.PubMedCrossRef
4.
Zurück zum Zitat Mummaneni PV, Burkus JK, Haid RW, Traynelis VC, Zdeblick TA. Clinical and radiographic analysis of cervical disc arthroplasty compared with allograft fusion: a randomized controlled clinical trial. J Neurosurg Spine. 2007;6(3):198–209.PubMedCrossRef Mummaneni PV, Burkus JK, Haid RW, Traynelis VC, Zdeblick TA. Clinical and radiographic analysis of cervical disc arthroplasty compared with allograft fusion: a randomized controlled clinical trial. J Neurosurg Spine. 2007;6(3):198–209.PubMedCrossRef
5.
Zurück zum Zitat Patwardhan AG, Tzermiadianos MN, Tsitsopoulos PP, Voronov LI, Renner SM, Reo ML, et al. Primary and coupled motions after cervical total disc replacement using a compressible six-degree-of-freedom prosthesis. Eur Spine J. 2012;21 Suppl 5:S618–29.PubMedCrossRef Patwardhan AG, Tzermiadianos MN, Tsitsopoulos PP, Voronov LI, Renner SM, Reo ML, et al. Primary and coupled motions after cervical total disc replacement using a compressible six-degree-of-freedom prosthesis. Eur Spine J. 2012;21 Suppl 5:S618–29.PubMedCrossRef
6.
Zurück zum Zitat Kang L, Lin D, Ding Z, Liang B, Lian K. Artificial disk replacement combined with midlevel ACDF versus multilevel fusion for cervical disk disease involving 3 levels. Orthopedics. 2013;36(1):e88–94.PubMedCrossRef Kang L, Lin D, Ding Z, Liang B, Lian K. Artificial disk replacement combined with midlevel ACDF versus multilevel fusion for cervical disk disease involving 3 levels. Orthopedics. 2013;36(1):e88–94.PubMedCrossRef
7.
Zurück zum Zitat Tian W, Han X, Li ZY, Mao JP, Sun YQ, James Albert T. Reversal of anterior cervical discectomy and fusion with cervical artificial disc replacement: regain motion after 9 years fusion. J Spinal Disord Tech. 2013;26(1):55–9.PubMedCrossRef Tian W, Han X, Li ZY, Mao JP, Sun YQ, James Albert T. Reversal of anterior cervical discectomy and fusion with cervical artificial disc replacement: regain motion after 9 years fusion. J Spinal Disord Tech. 2013;26(1):55–9.PubMedCrossRef
8.
Zurück zum Zitat Barbagallo GM, Assietti R, Corbino L, Olindo G, Foti PV, Russo V, et al. Early results and review of the literature of a novel hybrid surgical technique combining cervical arthrodesis and disc arthroplasty for treating multilevel degenerative disc disease: opposite or complementary techniques? Eur Spine J. 2009;18 Suppl 1:29–39.PubMedCentralPubMedCrossRef Barbagallo GM, Assietti R, Corbino L, Olindo G, Foti PV, Russo V, et al. Early results and review of the literature of a novel hybrid surgical technique combining cervical arthrodesis and disc arthroplasty for treating multilevel degenerative disc disease: opposite or complementary techniques? Eur Spine J. 2009;18 Suppl 1:29–39.PubMedCentralPubMedCrossRef
9.
Zurück zum Zitat Hey HW, Hong CC, Long AS, Hee HT. Is hybrid surgery of the cervical spine a good balance between fusion and arthroplasty? Pilot results from a single surgeon series. Eur Spine J. 2013;22(1):116–22.PubMedCentralPubMedCrossRef Hey HW, Hong CC, Long AS, Hee HT. Is hybrid surgery of the cervical spine a good balance between fusion and arthroplasty? Pilot results from a single surgeon series. Eur Spine J. 2013;22(1):116–22.PubMedCentralPubMedCrossRef
10.
Zurück zum Zitat Blumenthal SL, Ohnmeiss DD, Guyer RD, Zigler JE. Reoperations in cervical total disc replacement compared with anterior cervical fusion: results compiled from multiple prospective food and drug administration investigational device exemption trials conducted at a single site. Spine (Phila Pa 1976). 2013;38(14):1177–82.CrossRef Blumenthal SL, Ohnmeiss DD, Guyer RD, Zigler JE. Reoperations in cervical total disc replacement compared with anterior cervical fusion: results compiled from multiple prospective food and drug administration investigational device exemption trials conducted at a single site. Spine (Phila Pa 1976). 2013;38(14):1177–82.CrossRef
11.
Zurück zum Zitat Hirabayashi K, Miyakawa J, Satomi K, Maruyama T, Wakano K. Operative results and postoperative progression of ossification among patients with ossification of cervical posterior longitudinal ligament. Spine (Phila Pa 1976). 1981;6(4):354–64.CrossRef Hirabayashi K, Miyakawa J, Satomi K, Maruyama T, Wakano K. Operative results and postoperative progression of ossification among patients with ossification of cervical posterior longitudinal ligament. Spine (Phila Pa 1976). 1981;6(4):354–64.CrossRef
12.
Zurück zum Zitat Brodke DS, Zdeblick TA. Modified Smith-Robinson procedure for anterior cervical discectomy and fusion. Spine (Phila Pa 1976). 1992;17(10 Suppl):S427–30.CrossRef Brodke DS, Zdeblick TA. Modified Smith-Robinson procedure for anterior cervical discectomy and fusion. Spine (Phila Pa 1976). 1992;17(10 Suppl):S427–30.CrossRef
13.
Zurück zum Zitat Hilibrand AS, Robbins M. Adjacent segment degeneration and adjacent segment disease: the consequences of spinal fusion. Spine J. 2004;4(6 Suppl):190S–4.PubMedCrossRef Hilibrand AS, Robbins M. Adjacent segment degeneration and adjacent segment disease: the consequences of spinal fusion. Spine J. 2004;4(6 Suppl):190S–4.PubMedCrossRef
14.
Zurück zum Zitat Sun Y, Zhao YB, Pan SF, Zhou FF, Chen ZQ, Liu ZJ. Comparison of adjacent segment degeneration five years after single level cervical fusion and cervical arthroplasty: a retrospective controlled study. Chin Med J (Engl). 2012;125(22):3939–41. Sun Y, Zhao YB, Pan SF, Zhou FF, Chen ZQ, Liu ZJ. Comparison of adjacent segment degeneration five years after single level cervical fusion and cervical arthroplasty: a retrospective controlled study. Chin Med J (Engl). 2012;125(22):3939–41.
15.
Zurück zum Zitat Goffin J, Geusens E, Vantomme N, Quintens E, Waerzeggers Y, Depreitere B, et al. Long-term follow-up after interbody fusion of the cervical spine. J Spinal Disord Tech. 2004;17(2):79–85.PubMedCrossRef Goffin J, Geusens E, Vantomme N, Quintens E, Waerzeggers Y, Depreitere B, et al. Long-term follow-up after interbody fusion of the cervical spine. J Spinal Disord Tech. 2004;17(2):79–85.PubMedCrossRef
16.
Zurück zum Zitat Park DH, Ramakrishnan P, Cho TH, Lorenz E, Eck JC, Humphreys SC, et al. Effect of lower two-level anterior cervical fusion on the superior adjacent level. J Neurosurg Spine. 2007;7(3):336–40.PubMedCrossRef Park DH, Ramakrishnan P, Cho TH, Lorenz E, Eck JC, Humphreys SC, et al. Effect of lower two-level anterior cervical fusion on the superior adjacent level. J Neurosurg Spine. 2007;7(3):336–40.PubMedCrossRef
17.
Zurück zum Zitat Swank ML, Lowery GL, Bhat AL, McDonough RF. Anterior cervical allograft arthrodesis and instrumentation: multilevel interbody grafting or strut graft reconstruction. Eur Spine J. 1997;6(2):138–43.PubMedCentralPubMedCrossRef Swank ML, Lowery GL, Bhat AL, McDonough RF. Anterior cervical allograft arthrodesis and instrumentation: multilevel interbody grafting or strut graft reconstruction. Eur Spine J. 1997;6(2):138–43.PubMedCentralPubMedCrossRef
18.
Zurück zum Zitat Heller JG, Sasso RC, Papadopoulos SM, Anderson PA, Fessler RG, Hacker RJ, et al. Comparison of BRYAN cervical disc arthroplasty with anterior cervical decompression and fusion: clinical and radiographic results of a randomized, controlled, clinical trial. Spine (Phila Pa 1976). 2009;34(2):101–7.CrossRef Heller JG, Sasso RC, Papadopoulos SM, Anderson PA, Fessler RG, Hacker RJ, et al. Comparison of BRYAN cervical disc arthroplasty with anterior cervical decompression and fusion: clinical and radiographic results of a randomized, controlled, clinical trial. Spine (Phila Pa 1976). 2009;34(2):101–7.CrossRef
19.
Zurück zum Zitat Coric D, Nunley PD, Guyer RD, Musante D, Carmody CN, Gordon CR, et al. Prospective, randomized, multicenter study of cervical arthroplasty: 269 patients from the Kineflex|C artificial disc investigational device exemption study with a minimum 2-year follow-up. J Neurosurg Spine. 2011;15(4):348–58.PubMedCrossRef Coric D, Nunley PD, Guyer RD, Musante D, Carmody CN, Gordon CR, et al. Prospective, randomized, multicenter study of cervical arthroplasty: 269 patients from the Kineflex|C artificial disc investigational device exemption study with a minimum 2-year follow-up. J Neurosurg Spine. 2011;15(4):348–58.PubMedCrossRef
20.
Zurück zum Zitat Sasso RC, Smucker JD, Hacker RJ, Heller JG. Artificial disc versus fusion: a prospective, randomized study with 2-year follow-up on 99 patients. Spine (Phila Pa 1976). 2007;32(26):2933–40.CrossRef Sasso RC, Smucker JD, Hacker RJ, Heller JG. Artificial disc versus fusion: a prospective, randomized study with 2-year follow-up on 99 patients. Spine (Phila Pa 1976). 2007;32(26):2933–40.CrossRef
21.
Zurück zum Zitat Shin DA, Yi S, Yoon DH, Kim KN, Shin HC. Artificial disc replacement combined with fusion versus two-level fusion in cervical two-level disc disease. Spine (Phila Pa 1976). 2009;34(11):1153–9. discussion 1160–1161.CrossRef Shin DA, Yi S, Yoon DH, Kim KN, Shin HC. Artificial disc replacement combined with fusion versus two-level fusion in cervical two-level disc disease. Spine (Phila Pa 1976). 2009;34(11):1153–9. discussion 1160–1161.CrossRef
Metadaten
Titel
Clinical and radiological outcomes following hybrid surgery in the treatment of multi-level cervical spondylosis: over a 2-year follow-up
verfasst von
Ji-Sheng Shi
Bin Lin
Chao Xue
Hai-Shen Zhang
Zhi-Da Chen
Zhong-Sheng Zhao
Publikationsdatum
01.12.2015
Verlag
BioMed Central
Erschienen in
Journal of Orthopaedic Surgery and Research / Ausgabe 1/2015
Elektronische ISSN: 1749-799X
DOI
https://doi.org/10.1186/s13018-015-0330-5

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