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Microendoscopic Discectomy for Lumbar Disc Herniation. Does the Instability Affect the Low-back Pain? Takato Aihara 1 , Jyuntarou Oouchi 1 , Masashi Kimoto 2 , Tomonori Sodeyama 2 , Yasuhumi Saitou 1 , Takahiro Sanada 1 , Kenji Hatakeyama 1 1Funabashi Orthopedic Hospital 2Nishifuna Clinic of Funabashi Orthopedic Hospital Keyword: lumbar disc herniation , 腰椎椎間板ヘルニア , microendoscopic discectomy , 内視鏡下椎間板ヘルニア切除術 , low-back pain , 腰痛 pp.909-913
Published Date 2008/9/25
DOI https://doi.org/10.11477/mf.1408101363

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  • Abstract
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 Microendoscopic discectomy was used to treat lumbar disc herniation in 42 patients, and the intensity of their leg pain, numbness, and low back pain (LBP) measured on a visual analogue scale was recorded before and after surgery. Degree of improvement (DOI) was calculated by the following formula:preoperative score-postoperative score, and the patients were classified into two groups based on the DOI of LBP:a group whose DOI was more than twenty (M group) and a group whose DOI was less than twenty (L group). Lateral radiographs in maximal flexion and extension were obtained before and after microendoscopic discectomy to measure the angle and horizontal displacement (translation) in flexion and extension. There were no statistically significant differences between the two groups in DOI in leg pain or numbness. Preoperative and postoperative translation in flexion and extension in the L group had slipped significantly posteriorly comparison with the M group. These findings suggest that posterior translation in flexion and extension may be a cause of LBP in lumbar disc herniation.


Copyright © 2008, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1286 印刷版ISSN 0557-0433 医学書院

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