Cervical Disc Arthroplasty
The London Spine Unit : most advanced spine centre on Harley Street UK
Published article
CONCLUSIONS: Immediate postoperative SA has no significant effects on clinical outcomes and complications after CDA with Prestige-LP. However, it has a positive correlation with postoperative FSU angle and a negative correlation with ISH maintenance.
Cervical Disc Arthroplasty Expert. Best Spinal Surgeon UK
The London Spine Unit is a specialist clinic for Cervical Disc Arthoplasty as Day Surgery.
Abstract
Background: Cervical disc arthroplasty (CDA) using Prestige LP disc has been widely used for cervical degenerative disease. Postoperative shell angle (SA) is the angle between the upper and lower prosthesis endplate and previous studies have reported a significant correlation between prosthesis SA with postoperative biomechanical stress. Due to the lack of reference range in SA, a larger discrepancy exists in postoperative SA among the patients after CDA with Prestige LP disc.
Methods: A total of 160 patients who had been subjected to single level CDA with Prestige-LP were enrolled. SA was defined the angle between the upper and lower prosthesis endplate and patients were assigned into parallel (SA 0°-3°) and lordotic (SA > 3°) groups according to the immediate postoperative SA. Patients were followed up for a mean duration of 27.78 ± 5.13 months. Clinical, radiographic and complication data were compared among groups.
Results: 90 patients were assigned in the parallel group while 70 patients were included in the lordotic group. The mean immediate postoperative SA in the parallel and lordotic groups were 1.64 ± 0.08° and 4.88 ± 1.20°, respectively (p < 0.05). FSU angle in the parallel group at 1 year and last follow-up were 2.6 ± 2.1° and 2.1 ± 2.0°, respectively, with a change value of - 0.68 ± 2.28°. In the lordotic group, FSU angle at 1 year and last follow-up were 3.3 ± 2.5° and 3.1 ± 2.2°, respectively, with a change value of 0.70 ± 1.43°. At 1 year, the FSU angle in the parallel group was significantly low than in the lordotic group (p < 0.05). Besides, average intervertebral space heights (ISH) at 6 months, 1 year and last follow-up were 6.81 ± 0.38 mm, 6.79 ± 0.3 7 mm, 6.78 ± 0.36 mm in the parallel group and 6.64 ± 0.24 mm, 6.32 ± 0.19 mm, 6.30 ± 0.19 mm in the lordotic group, respectively (all p < 0.05). There were no significant differences in clinical outcomes and complications between the groups (p > 0.05).
Conclusions: Immediate postoperative SA has no significant effects on clinical outcomes and complications after CDA with Prestige-LP. However, it has a positive correlation with postoperative FSU angle and a negative correlation with ISH maintenance.
Keywords: Cervical; Disc replacement; FSU angle; Prosthesis; Shell angle.
The London Spine Unit : most advanced spine centre on Harley Street UK
Read the original publication from Pubmed :