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논문 기본 정보

자료유형
학술저널
저자정보
Aoyama Ryoma (Tokyo Dental College Ichikawa General Hospital Ichikawa Japan) Yamane Junichi (Murayama Medical Center Musashimurayama Japan) Ninomiya Ken (Shizuoka City Shimizu Hospital Shizuoka Japan) Takahashi Yuichiro (okyo Dental College Ichikawa General Hospital Ichikawa Japan) Kitamura Kazuya (National Defense Medical College Tokorozawa Japan) Nori Satoshi (Keio University School of Medicine Tokyo Japan) Suzuki Satoshi (Keio University School of Medicine Tokyo Japan) Shiraishi Tateru (Tokyo Dental College Ichikawa General Hospital Ichikawa Japan)
저널정보
대한척추외과학회 Asian Spine Journal Asian Spine Journal Vol.16 No.5
발행연도
2022.10
수록면
666 - 676 (11page)
DOI
10.31616/asj.2021.0186

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초록· 키워드

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Study Design: A retrospective study conducted at a single academic institution.Purpose: This study compared the postoperative alignment of consecutive double laminectomies according to their decompression levels and investigated the influence of the extension unit of the spinous process and its attached muscles on postoperative alignment.Overview of Literature: Many reports have investigated bony and soft tissue factors as the causes of postoperative cervical alignment disorders. To-this-date, no other article has clarified the importance of the attached muscles between the spinous processes of C3 and C6 to maintain local cervical alignment.Methods: In total, 155 consecutive patients who underwent muscle-preserving consecutive double laminectomies for cervical spondylotic myelopathy from 2005 to 2013 were included in this study. The imaging parameters included the C2–C7 angle, range of motion, C2–C7 sagittal vertical axis (SVA), C7 slope, C2–C5 angle, C5-C7 angle, local disk angle caudal to the decompression level, and the disk height between C2/C3 and C7/Th1.Results: The caudal disk angle of the decompression level decreased after consecutive double laminectomies, thus suggesting that the extension unit maintained the local lordosis at the lower disk of the decompression level. Postoperatively, in the C3–4 decompression cases, the C2–C7 angle decreased by 7.3°, and the C2–C7 SVA increased by 8.6 mm, thus indicating the appearance of an alignment disorder. Multivariate logistic regression analysis showed that cephalad laminectomy was a risk factor for C2–C7 angle decreases >10°. However, the postoperative recovery rate of Japanese Orthopedic Association scores after consecutive double laminectomies was reasonable, and the overall cervical alignment was well maintained in all decompression levels except C3–C4.Conclusions: The cervical extension unit maintained lordosis at the disk caudal to it. The extension unit was found to contribute more to the maintenance of lordosis of the entire cervical spine at the cephalad side.

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