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Two-year observation of artificial intervertebral disc replacement: results after supplemental ultra-high strength bioresorbable spinal stabilization.

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Title: Two-year observation of artificial intervertebral disc replacement: results after supplemental ultra-high strength bioresorbable spinal stabilization.
Authors: Kotani, Yoshihisa Browse this author →KAKEN DB
Abumi, Kuniyoshi Browse this author
Shikinami, Yasuo Browse this author
Takahata, Masahiko Browse this author
Kadoya, Ken Browse this author
Kadosawa, Tsuyoshi Browse this author
Minami, Akio Browse this author →KAKEN DB
Kaneda, Kiyoshi Browse this author
Keywords: artificial intervertebral disc
bioresorbable device
lumbar spine
Issue Date: Apr-2004
Publisher: American Association of Neurological Surgeons
Journal Title: Journal of Neurosurgery : Spine
Volume: 100
Issue: 4 Supplement
Start Page: 337
End Page: 342
PMID: 15070141
Abstract: OBJECT: This 2-year experimental study was conducted to investigate the efficacy of a bioactive three-dimensional (3D) fabric disc for lumbar intervertebral disc replacement. The authors used a bioresorbable spinal fixation rod consisting of a forged composite of particulate unsintered hydroxyapatite/poly-L-lactide acid (HA/PLLA) for stability augmentation. The biomechanical and histological alterations as well as possible device-related loosening were examined at 2 years postoperatively. METHODS: Two lumbar intervertebral discs (L2-3 and L4-5) were replaced with the 3D fabric discs, which were augmented by two titanium screws and a spanning bioresorbable rod (HA/PLLA). The segmental biomechanics and interface bone ingrowth were investigated at 6, 15, and 24 months postoperatively, and results were compared with the other two surgical groups (3D fabric disc alone; 3D fabric disc with additional anterior instrumentation stabilization). The 3D fabric disc and HA/PLLA-spinal segments demonstrated segmental mobility at 15 and 24 months; however, the range of motion (ROM) in flexion-extension decreased to 49 and 40%, respectively, despite statistically equivalent preserved torsional ROM. Histologically there was excellent osseous fusion at the 3D fabric disc surface-vertebral body interface. At 2 years posttreatment, no adverse tissue reaction nor aseptic loosening of the device was observed. CONCLUSIONS: Intervertebral disc replacement with the 3D fabric disc was viable and when used in conjunction with the bioresorbable HA/PLLA spinal augmentation. Further refinements of device design to create a stand-alone type are necessary to obviate the need for additional spinal stabilization.
Rights: The final version of the paper was published in Journal of Neurosurgery:Spine, vol. 100-4 Supplement. For reuse of any of the materials, including editorial copy, figures, or tables please contact the Journal of Neurosurgery at
Type: article (author version)
Appears in Collections:医学院・医学研究院 (Graduate School of Medicine / Faculty of Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 小谷 善久

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