Effect of prosthesis endplate lordosis angles on L5-S1 kinematics after disc arthroplasty

Objective We hypothesized that L5-S1 kinematics will not be affected by the lordosis distribution between the prosthesis endplates. Materials and methods Twelve cadaveric lumbosacral spines (51.3 ± 9.8 years) were implanted with 6° or 11° prostheses (ProDisc-L) with four combinations of superior/inf...

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Bibliographic Details
Published in:European spine journal 2012-06, Vol.21 (Suppl 5), p.585-591
Main Authors: Tsitsopoulos, Parmenion P., Wojewnik, Bartosz, Voronov, Leonard I., Havey, Robert M., Renner, Susan M., Zelenakova, Julia, McIntosh, Braden, Carandang, Gerard, Abjornson, Celeste, Patwardhan, Avinash G.
Format: Article
Language:English
Subjects:
Adult
Biomechanical Phenomena - physiology
Cadaver
Diskectomy - methods
Humans
Intervertebral Disc - physiology
Intervertebral Disc - surgery
Lordosis - etiology
Lordosis - physiopathology
Lordosis - prevention & control
Lumbar Vertebrae - physiology
Lumbar Vertebrae - surgery
Medicine
Medicine & Public Health
Middle Aged
Neurosurgery
Original
Original Article
Postoperative Complications - etiology
Postoperative Complications - physiopathology
Postoperative Complications - prevention & control
Prosthesis Design - methods
Range of Motion, Articular - physiology
Sacrum - physiology
Sacrum - surgery
Surgical Orthopedics
Total Disc Replacement - adverse effects
Total Disc Replacement - instrumentation
Total Disc Replacement - methods
Zygapophyseal Joint - physiology
Zygapophyseal Joint - surgery
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Summary:Objective We hypothesized that L5-S1 kinematics will not be affected by the lordosis distribution between the prosthesis endplates. Materials and methods Twelve cadaveric lumbosacral spines (51.3 ± 9.8 years) were implanted with 6° or 11° prostheses (ProDisc-L) with four combinations of superior/inferior lordosis (6°/0°, 3°/3°, 11°/0°, 3°/8°). Specimens were tested intact and after prostheses implantation with different lordosis distributions. Center of rotation (COR) and range of motion (ROM) were quantified. Results Six-degree lordosis prostheses ( n  = 7) showed no difference in flexion–extension ROM, regardless of design (6°/0° or 3°/3°) ( p  > 0.05). In lateral bending (LB), both designs reduced ROM ( p  
ISSN:0940-6719
1432-0932
DOI:10.1007/s00586-012-2271-6