How Center of Rotation Changes and What Affects These After Cervical Arthroplasty: A Systematic Review and Meta-analysis

Sang, Hongpeng; Cui, Wei; Sang, Dacheng; Guo, Ze; Liu, Baoge

doi:10.1016/j.wneu.2019.12.111

Cited by 19 publications

(10 citation statements)

References 24 publications

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“…When a constrained or semiconstrained CAD such as Prestige LP is selected, the COR tends to shift anteriorly and/or superiorly. 60) In contrast, when a non-constrained CAD such as Mobi-C is selected, the COR tends to stay close to the original location. They also concluded that the position of CAD in the intervertebral space can affect the change in COR after ACDR.…”

Section: Cad Designmentioning

confidence: 99%

Safety and Validity of Anterior Cervical Disc Replacement for Single-level Cervical Disc Disease: Initial Two-year Follow-up of the Prospective Observational Post-marketing Surveillance Study for Japanese Patients

Takami

Hara

et al. 2022

Neurol. Med. Chir.(Tokyo)

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Anterior cervical disc replacement (ACDR) using cervical artificial disc (CAD) has the advantage of maintaining the range of motion (ROM) at the surgical level, subsequently reducing the postoperative risk of adjacent disc disease. Following the approval for the clinical use in Japan, a post-marketing surveillance (PMS) study was conducted for two different types of CAD, namely, Mobi-C (metal-onplastic design) and Prestige LP (metal-on-metal design). The objective of this prospective observational multicenter study was to analyze the first 2-year surgical results of the PMS study of 1-level ACDR in Japan. A total of 54 patients were registered (Mobi-C, n = 24, MC group; Prestige LP, n = 30, PLP group). Preoperative neurological assessment revealed radiculopathy in 31 patients (57.4%) and myelopathy in 15 patients (27.8%). Preoperative radiological assessment classified the disease category as disc herniation in 15 patients (27.8%), osteophyte in 6 patients (11.1%), and both in 33 patients (61.1%). The postoperative follow-up rates at 6 weeks, 6 months, 1 year, and 2 years after ACDR were 92.6%, 87.0%, 83.3%, and 79.6%, respectively. In both groups, patients' neurological condition improved significantly after surgery. Radiographic assessment revealed loss of mobility at the surgical level in 9.5% of patients in the MC group and in 9.1% of patients in the PLP group. No secondary surgeries at the initial surgical level and no serious adverse events were observed in either group. The present results suggest that 1-level ACDR is safe, although medium-to long-term follow-up is mandatory to further verify the validity of ACDR for Japanese patients.

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Section: Cad Designmentioning

confidence: 99%

Safety and Validity of Anterior Cervical Disc Replacement for Single-level Cervical Disc Disease: Initial Two-year Follow-up of the Prospective Observational Post-marketing Surveillance Study for Japanese Patients

Takami

Hara

et al. 2022

Neurol. Med. Chir.(Tokyo)

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“…The ability of the Bryan disc to maintain the COR at the operated level has been confirmed by several clinical reports [3,15,31,32] and finite element analyses [14,33]. The maintenance of the COR at the operated level is closely associated with the kinematic characteristics of the artificial cervical disc, which are determined by the design and structure of the prosthesis [6]. The Bryan disc is the first truly non-constrained artificial cervical disc used in clinical applications [34].…”

Section: Discussionmentioning

confidence: 85%

“…A number of publications have already demonstrated the successful preservation of range of motion (ROM) at the operated level, but the purpose of ACDR is to restore the cervical physiological motion after nerve decompression, and the physiological motion patterns may influence the long-term clinical outcomes of ACDR through prolonged viability of the implants, reduction of stress at zygapophyseal joints, and improvement of the kinematics and biomechanics at adjacent levels [3][4][5]. Thus, attention is increasingly shifting to in vivo kinematics analysis of the artificial cervical disc [6].…”

Section: Introductionmentioning

confidence: 99%

Mid-long-term follow-up of operated level kinematics after single-level artificial cervical disc replacement with Bryan disc

Feng

Xiong

et al. 2022

J Orthop Surg Res

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Objective Evaluation of the mid-long-term kinematics of single-level Bryan artificial cervical disc replacement (ACDR) in vivo by analyzing the center of rotation (COR) at the operated level. Methods A retrospective analysis was conducted using data collected from 38 patients who underwent single-level Bryan ACDR from January 2010 to March 2013. Radiological parameters including range of motion (ROM), lordosis angle, translation, and COR were obtained. Clinical outcomes were assessed based on Odom Criteria, modified Japanese Orthopedic Association (mJOA), Neck Disability Index (NDI), and Visual Analogue Scale (VAS) scores. Correlations between COR and other follow-up data were discussed at the last follow-up. Results Compared with preoperative values, the last follow-up data showed that 86.84% of cases achieved good-or-excellent outcomes based on Odom criteria; Significant improvements were observed across all scales assessed for clinical outcomes (P < 0.05); Lordosis angle was significantly increased in both the overall cervical spine and the operated level (P < 0.05); ROM of the overall cervical spine, operated level, and adjacent levels was preserved (P > 0.05); There was no significant change in COR at the operated level (P > 0.05). At the last follow-up and at the operated level, COR (Y) showed negative correlations with ROM and translation (P < 0.05), but no follow-up data correlated with COR (X) were found (P > 0.05). Conclusions Satisfactory clinical and radiological outcomes were achieved 7 years or more after single-level Bryan ACDR. At the operated level, preoperative COR was maintained, probably due to replicating the physiological interrelations of COR (Y), translation, and ROM.

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“…We suggest that an inappropriate (≥2 mm more than the normal disc) increase in disc space height could lead to accelerated failure of the artificial disc, while a decrease smaller than the normal disc could cause collapse of the artificial disc device. Sang, et al 38 recently demonstrated that the prosthesis design affected changes in the center of rotation (COR); specifically, constrained or semi-constrained prostheses (two-piece implant, ball-and-socket or ball-in-trough design) tended to shift anteriorly and/or superiorly of the COR location, whereas unconstrained prostheses (three-piece implant, mobile nucleus design) tended to maintain the same COR location as that before surgery. Even if a new design is developed, further study is needed to evaluate the selection of surgical prostheses and the standardization of surgical techniques.…”

Section: Discussionmentioning

confidence: 99%

Radiological Changes in Adjacent and Index Levels after Cervical Disc Arthroplasty

et al. 2022

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Purpose The purpose of this retrospective study was to evaluate radiological and clinical outcomes in patients undergoing cervical disc arthroplasty (CDA) for cervical degenerative disc disease. The results may assist in surgical decision-making and enable more effective and safer implementation of cervical arthroplasty. Materials and Methods A total of 125 patients who were treated with CDA between 2006 and 2019 were assessed. Radiological measurements and clinical outcomes included the visual analogue scale (VAS), the Neck Disability Index (NDI), and the Japanese Orthopaedic Association (JOA) myelopathy score assessment preoperatively and at ≥2 years of follow-up. Results The mean follow-up period was 38 months (range, 25–114 months). Radiographic data demonstrated mobility at both the index and adjacent levels, with no signs of hypermobility at an adjacent level. There was a non-significant loss of cervical global motion and range of motion (ROM) of the functional spinal unit at the operated level, as well as the upper and lower adjacent disc levels, compared to preoperative status. The cervical global and segmental angle significantly increased. Postoperative neck VAS, NDI, and JOA scores showed meaningful improvements after one- and two-level CDA. We experienced a 29.60% incidence of heterotrophic ossification and a 3.20% reoperation rate due to cervical instability, implant subsidence, or osteolysis. Conclusion CDA is an effective surgical technique for optimizing clinical outcomes and radiological results. In particular, the preservation of cervical ROM with an artificial prosthesis at adjacent and index levels and improvement in cervical global alignment could reduce revision rates due to adjacent segment degeneration.

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How Center of Rotation Changes and What Affects These After Cervical Arthroplasty: A Systematic Review and Meta-analysis

Cited by 19 publications

References 24 publications

Safety and Validity of Anterior Cervical Disc Replacement for Single-level Cervical Disc Disease: Initial Two-year Follow-up of the Prospective Observational Post-marketing Surveillance Study for Japanese Patients

Safety and Validity of Anterior Cervical Disc Replacement for Single-level Cervical Disc Disease: Initial Two-year Follow-up of the Prospective Observational Post-marketing Surveillance Study for Japanese Patients

Mid-long-term follow-up of operated level kinematics after single-level artificial cervical disc replacement with Bryan disc

Radiological Changes in Adjacent and Index Levels after Cervical Disc Arthroplasty

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