Biomechanical study on the effect of five different lumbar reconstruction techniques on adjacent-level intradiscal pressure and lamina strain.

Sudo, Hideki; Oda, Itaru; Abumi, Kuniyoshi; Ito, Manabu; Kotani, Yoshihisa; Minami, Akio

Biomechanical study on the effect of five different lumbar reconstruction techniques on adjacent-level intradiscal pressure and lamina strain.

Sudo, Hideki; Oda, Itaru; Abumi, Kuniyoshi et al.

Journal Of Neurosurgery:Spine, 2006, 5(2), 150-155

Permalink : https://hdl.handle.net/2115/14612

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アクセス権	open access
URI	https://hdl.handle.net/2115/14612
タイトル	Biomechanical study on the effect of five different lumbar reconstruction techniques on adjacent-level intradiscal pressure and lamina strain.
著者	Sudo, Hideki ; Oda, Itaru ; Abumi, Kuniyoshi ; Ito, Manabu ; Kotani, Yoshihisa ; Minami, Akio
著者名 Sudo, Hideki
著者名 Oda, Itaru
著者名 Abumi, Kuniyoshi
著者名 Ito, Manabu
著者名 Kotani, Yoshihisa
e-Rad_Researcher 20133738 著者名 Minami, Akio
言語	英語
キーワード	biomechanical testing
	lumbar spine
	posterior lumbar interbody fusion
	intradiscal pressure
	lamina strain
	kyphosis
発行日	2006-08
出版者	American Association of Neurological Surgeons
収録物名	Journal Of Neurosurgery:Spine
巻(号)	5(2)
ページ	150-155
抄録	OBJECT: The objectives of this study were to compare the biomechanical effects of five lumbar reconstruction models on the adjacent segment and to analyze the effects of three factors: construct stiffness, sagittal alignment, and the number of fused segments. METHODS: Nondestructive flexion-extension tests were performed by applying pure moments to 10 calf spinal (L3-S1) specimens. One-segment (L5-6) or two-segment (L5-S1) posterior fusion methods were simulated: 1) one-segment posterolateral fusion (PLF); 2) one-segment PLF with interbody fusion cages (one-segment PLIF/PLF); 3) two-segment PLF; 4) two-segment PLIF/PLF; and 5) two-segment PLF in kyphosis (two-segment kyphotic PLF). The range of motion (ROM) of the reconstructed segments, intradiscal pressure (IDP), and lamina strain in the upper (L4-5) adjacent segment were analyzed. The ROM was significantly decreased in the PLIF/PLF models compared with that in the PLF alone models after both the one- and two-segment fusions. If the number of fused segments was increased, the pressure and strains were also increased in specimens subjected to the PLIF/PLF procedure, more so than the PLF-alone procedure. In the one-segment PLIF/PLF model the authors observed a reduced IDP and lamina strain compared with those in the kyphotic two-segment PLF model despite the latter's higher levels of initial stiffness. CONCLUSIONS: If the number of fused levels can be reduced by using PLIF to correct local kyphosis, then this procedure may be valuable for reducing adjacent-segment degenerative changes.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	The final version of the paper was published in Journal Of Neurosurgery:Spine, 2006, volume5-2. For reuse of any of the materials, including editorial copy, figures, or tables please contact the Journal of Neurosurgery at jneuro@virginia.edu
PISSN	1547-5654
関連情報	PMID 16925082