Results of cervical recapping laminoplasty: gross anatomical changes, biomechanical evaluation at different time points and degrees of level involvement

Autor: Guo zhong Lin, Tao Yu, Jia Zhang, Yuan chao Li, Kuo Zhang, Zhenyu Wang, Yu Si, Hua Zhang
Rok vydání: 2013
Předmět:
Decompression
medicine.medical_treatment
lcsh:Medicine
Nervous System
Mechanical Treatment of Specimens
Laminoplasty
Nervous System Procedures
Medicine and Health Sciences
Biomechanics
lcsh:Science
Musculoskeletal System
Neurological Tumors
Orthodontics
Multidisciplinary
Goats
Laminectomy
Animal Models
Decompression
Surgical
medicine.anatomical_structure
Vertebral canal
Electroporation
Spinal Cord
Neurology
Oncology
Specimen Disruption
Cervical Vertebrae
Anatomy
Cervical vertebrae
Research Article
Spinal Cord Tumors
medicine.medical_specialty
Neurosurgery
Surgical and Invasive Medical Procedures
Research and Analysis Methods
Model Organisms
medicine
Animals
Humans
Spinal canal
business.industry
Joints anatomy
lcsh:R
Biology and Life Sciences
Cancers and Neoplasms
Surgery
Disease Models
Animal
Neuroanatomy
Specimen Preparation and Treatment
lcsh:Q
sense organs
business
Neuroscience
Zdroj: PLoS ONE
PLoS ONE, Vol 9, Iss 6, p e100689 (2014)
ISSN: 1932-6203
Popis: BACKGROUND: Recapping laminoplasty has become the frequently-used approach to the spinal canal when bone decompression of the vertebral canal is not the goal. However, what changes will occur after surgery, and whether recapping laminoplasty can actually reduce the risk of delayed deformities remains unknown. METHODOLOGY: We designed an animal experiment using a caprine model, and partitioned the animals into in vitro and in vivo surgical groups. We performed recapping laminoplasty on one group and laminectomy on another group. These animals were sacrificed six months after operating, cervical spines removed, biomechanically tested, and these data were compared to determine whether the recapping laminoplasty technique leads to subsequent differences in range of motion. Image data were also obtained before the surgery and when the animals were killed. Besides, we investigated the initial differences in kinetics between recapping laminoplasty and laminectomy. We did this by comparing data obtained from biomechanical testing of in vitro-performed recapping laminoplasty and laminectomy. Finally, we investigated the effect that longitudinal distance has on cervical mechanics. This was determined by performing a two-level recapping laminoplasty, and then extending the laminoplasty to the next level and repeating the mechanical testing at each step. PRINCIPAL FINDINGS: There were three mainly morphological changes at the six months after laminoplasty: volume reduction and bone nonunion of the recapping laminae, irregular fibrosis formation around the facet joints and re-implanted lamina-ligamentous complex. In the biomechanical test, comparing with laminectomy, recapping laminoplasty didn't show significant differences in the immediate postoperative comparison, while recapping laminoplasty demonstrated significantly decreased motion in flexion/extension six months later. Inclusion of additional levels in the laminotomy procedure didn't lead to changes in immediate biomechanics. CONCLUSIONS: Recapping laminoplasty can't fully restore the posterior structure, but still reduced the risk of delayed cervical instability in a caprine model.
Databáze: OpenAIRE
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