Spine Model for Disc Replacement

2014 ◽  
pp. 213-223
Author(s):  
Qi Li ◽  
Lizhen Wang ◽  
Zhongjun Mo ◽  
Yubo Fan
Keyword(s):  
Disc Replacement ◽  
Spine Model

scholarly journals Multidirectional flexibility analysis of cervical artificial disc reconstruction: in vitro human cadaveric spine model

2005 ◽  
Vol 2 (2) ◽  
pp. 188-194 ◽  
Author(s):  
Yoshihisa Kotani ◽  
Bryan W. Cunningham ◽  
Kuniyoshi Abumi ◽  
Anton E. Dmitriev ◽  
Manabu Ito ◽  
...  
Keyword(s):  
Bone Graft ◽  
Iliac Bone ◽  
Disc Replacement ◽  
Artificial Disc ◽  
Content Type ◽  
Iliac Bone Graft ◽  
Spine Model ◽  
Spinal Segments ◽  
Fine Print

Object. This in vitro experimental study was conducted to investigate the initial biomechanical effect of artificial intervertebral disc replacement in the cervical spine. The multidirectional flexibility of replaced and adjacent spinal segments were analyzed using a cadaveric cervical spine model. Methods. The following three cervical reconstructions were sequentially performed at the C5–6 level after anterior discectomy in seven human cadaveric occipitocervical spines: anterior artificial disc replacement with a bioactive three-dimensional (3D) fabric disc (FD); anterior iliac bone graft; and anterior plate fixation with iliac bone graft. Six unconstrained pure moments were applied with a 6-df spine simulator, and 3D segmental motions at the operative and adjacent segments were measured with an optoelectronic motion measurement system. The 3D FD group demonstrated statistically equivalent ranges of motion (ROMs) when compared with intact values in axial rotation and lateral bending. The 45% increase in flexion—extension ROM was demonstrated in 3D FD group; however, neutral zone analysis did not reach statistical significance between the intact spine and 3D FD. The anterior iliac bone graft and iliac bone graft reconstructions demonstrated statistically lower ROMs when compared with 3D FD in all loading modes (p < 0.05). The adjacent-level ROMs of the 3D FD group demonstrated nearly physiological characteristics at upper and lower adjacent levels. Excellent stability at the interface was maintained during the whole testing without any device displacement and dislodgment. Conclusions. The stand-alone cervical 3D FD demonstrated nearly physiological biomechanical characteristics at both operative and adjacent spinal segments in vitro, indicating an excellent clinical potential for cervical artificial disc replacement.

The Feasibility of Optimal Surgical Result Prediction according to the Centre of Rotation Shift after Multilevel Cervical Total Disc Replacement

2018 ◽  
Vol 1 (2) ◽  
pp. 6
Author(s):  
Jun Ho Lee
Keyword(s):  
Rating Scale ◽  
Clinical Success ◽  
Total Disc Replacement ◽  
Numeric Rating Scale ◽  
Disc Replacement ◽  
Cervical Disc ◽  
Consecutive Series ◽  
Cervical Total Disc Replacement ◽  
Successful Group ◽  
Centre Of Rotation

Objective: This study investigates the relation between shifted locations of centre of rotation (COR) at each cervical level and subsequent surgical outcomes after multilevel cervical total disc replacement (MCTDR) and identifies radiological parameter that corresponded to change of COR after MCTDR. Methods: The study included a consecutive series of 24 patients who were treated with MCTDR following diagnosis of multilevel cervical disc herniation or stenosis. Numeric rating scale (NRS), range of motion (ROM) at both C2-7 segment and TDR implanted levels, and the location of COR at TDR implanted level were evaluated at pre- and post-MCTDR. These parameters were compared between patients who experienced successful and unsuccessful pain relief.Results: The inherent CORs relatively at ventro-cranial coordinates have demonstrated significant migrations to dorso-caudal locations at each cervical levels, more prominent shifts for the successful group, after MCTDR switch. The unsuccessful group showed markedly reduced C2-7 ROM and reduced angular improvement at C2-7 as well as MCTDR level after surgery in comparison with the successful group. Postoperative C2-7 ROM was related to postoperative COR along the X-axis.Conclusions: The crucial determinants for clinical success after MCTDR, other than mere preservation of the ROM both at C2-7 and TDR implanted levels, was the restoration of COR from ventro-cranial location at degenerated cervical motion segment close to normal coordinates by posterior and inferior shifts after MCTDR. The position of COR along the X-axis after MCTDR was an important factor to determine maintenance of C2-7 RO.

Mechanical failure of the Mobi-C implant for artificial cervical disc replacement: report of 4 cases

2020 ◽  
Vol 33 (6) ◽  
pp. 727-733
Author(s):  
Jasmine A. T. DiCesare ◽  
Alexander M. Tucker ◽  
Irene Say ◽  
Kunal Patel ◽  
Todd H. Lanman ◽  
...  
Keyword(s):  
Cervical Spondylosis ◽  
Case Series ◽  
Dynamic Imaging ◽  
Disc Replacement ◽  
Cervical Disc ◽  
Artificial Disc ◽  
Younger Patients ◽  
Cervical Disc Replacement ◽  
Short And Long Term

Cervical spondylosis is one of the most commonly treated conditions in neurosurgery. Increasingly, cervical disc replacement (CDR) has become an alternative to traditional arthrodesis, particularly when treating younger patients. Thus, surgeons continue to gain a greater understanding of short- and long-term complications of arthroplasty. Here, the authors present a series of 4 patients initially treated with Mobi-C artificial disc implants who developed postoperative neck pain. Dynamic imaging revealed segmental kyphosis at the level of the implant. All implants were locked in the flexion position, and all patients required reoperation. This is the first reported case series of symptomatic segmental kyphosis after CDR.

Clinical and Radiological Mid-Term Outcomes of Lumbar Single-Level Total Disc Replacement

Spine ◽  
2018 ◽  
Vol 43 (2) ◽  
pp. 105-113 ◽  
Author(s):  
Matthew N. Scott-Young ◽  
Matthew J. Lee ◽  
David E. A. Nielsen ◽  
Carly L. Magno ◽  
Kristy R. Kimlin ◽  
...  
Keyword(s):  
Total Disc Replacement ◽  
Disc Replacement ◽  
Single Level
Sign in / Sign up

Export Citation Format

Share Document