Spinal canal volume change and clinical significance of cervical minimally
invasive lamionplasty with specimen simulation

doi:10.3969/j.issn.2095-4344.2013.26.014

Abstract

Abstract:

BACKGROUND: Single-door and double-door of cervical laminopalsry are now the main methods for the treatment of multiple segments cervical spondylotic myelopathy, but they all have the same question that with the spinous process ligament complex damaged, even completely resected and affect the curative effect
OBJECTIVE: To observe the canal volume expansion and to analyze the effect of decompression and curative effect after cervical minimally invasive laminoplasty.
METHODS: Twelve dry specimens of the fifth cervical vertebra were selected to simulate cervical minimally invasive lamionplasty. In the concession 1, 2 and 3 mm groups, the bilateral vertebral plate long strip slotted, spinous and vertebral plate retruded by 1 mm, 2 mm and 3 mm respectively, and the specimens before concession were regarded as the control group. The specimens were thin-slice scanned with spiral CT, the volume of bony cervical canal was measured with the tools in CT workstation respectively. Forty-six cervical spondylotic myelopathy patients received cervical minimally invasive laminoplasty from September 2010 to September 2011 in the Department of Orthopedics, the First Affiliated Hospital of Zhengzhou University. According to Japanese Orthopaedic Association scoring system, neurologic function was evaluated before and after surgery through self-control.
RESULTS AND CONCLUSION: The average cervical bony spinal canal volume of the control group was (1 592±331) mm3, the average cervical bony spinal canal volumes of concession 1 mm, 2 mm and 3 mm groups were (1 727±357) mm3, (1 861±386) mm3 and (2 001±416) mm3 respectively; the improvement rates of canal capacity of concession 1 mm, 2 mm and 3 mm groups were (8.53±1.05)%, (16.93±1.78)% and (25.75±2.97)% respectively, and there was significant difference between groups (P < 0.05). The Japanese Orthopaedic Association score of the 36 patients was (7.97±1.73) points before treatment, and (13.14±1.74) in the final follow-up, there was significant difference (P < 0.05); the Japanese Orthopaedic Association score improvement rate was (58.55±13.71)%, the excellent and good rate was 83.3% (9 excellent, 21 good and 6 fair). Specimen simulation can better reflect the spinal canal volume after cervical minimally invasive lamionplasty, and provide a reliable basis for guiding effective decompression.

Key words: bone and joint implants, basic experiment of spinal cord injury, minimal invasion, cervical, fifth cervical vertebra, laminoplasty, computed tomography, spinal canal volume, Japanese Orthopaedic Association score

CLC Number:

R318

Zhang Chun-lin, Zeng Zhao-feng, Tang Heng-tao, Yan Xu, Wang Chuang-jian. Spinal canal volume change and clinical significance of cervical minimally
invasive lamionplasty with specimen simulation[J]. Chinese Journal of Tissue Engineering Research, doi: 10.3969/j.issn.2095-4344.2013.26.014.

Figures/Tables 3

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