DECOMPRESSION LAMINOPLASTY WITH POROUS NICKEL TITANIUM FOR SPINAL CANAL DEGENERATIVE STENOSIS: EXPERIMENTAL AND CLINICAL STUDIES
Abstract
Objectives. Assessment of the effectiveness of decompression laminoplasty with porous nickel titanium for degenerative stenosis of the cervical and lumbar spinal canal.
Materials and methods. Spine specimens after laminectomy (control group), and after laminoplasty with autobone, with porous NiTi and with porous NiTi combined with autobone (experimental groups) were examined. Radiographic, X-ray contrast and microscopic examinations were performed in 3, 6 and 12 months. Decompression laminoplasty with porous NiTi in the cervical and lumbar spine was performed in 54 patients with degeneative stenosis of the cervical and lumbar spinal canal. The neurologic status dynamics, Osvestry score, and pain intensity according to visual-analogue scale were determined, radiography and myelography were performed after surgery alongside with kinematic analysis of the spine shape and orientation in the sagittal plane.
Results. Experimentally it was revealed that plate of porous nickel titanium delimited dura mater from paravertebral soft tissues and autobone. Clinical results of a 4-year-follow up were studied. Pain syndrome regress and positive neurologic dynamics were registered in all patients. The comparisons of the dural sac contour before and after surgery revealed its postoperative enlargement. The correlation of biomechanical characteristics of the spine shape and orientation in a sagittal plane with clinical signs of spinal canal stenosis was revealed. Correction of the spine shape and orientation without development of segmental instability is registered in a postoperative period.
About the Authors
Aleksandr Vladimirovich Krutko
Novisibirsk Research Institute of Traumatology and Orthopaedics
Russian Federation
Russian Federation
Aleksandr Evgenyevich Simonovich
Novisibirsk Research Institute of Traumatology and Orthopaedics
Russian Federation
Russian Federation
Alla Mikhailovna Zaidman
Novisibirsk Research Institute of Traumatology and Orthopaedics
Russian Federation
Russian Federation
Aleksandr Vjacheslavovich Gladkov
Novisibirsk Research Institute of Traumatology and Orthopaedics
Russian Federation
Russian Federation
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Review
For citations:
Krutko A.V., Simonovich A.E., Zaidman A.M., Gladkov A.V. DECOMPRESSION LAMINOPLASTY WITH POROUS NICKEL TITANIUM FOR SPINAL CANAL DEGENERATIVE STENOSIS: EXPERIMENTAL AND CLINICAL STUDIES. Russian Journal of Spine Surgery (Khirurgiya Pozvonochnika). 2004;(4):47-56. (In Russ.)
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