Basic Pelvic Parameters Associated with Lumbar Degenerative Disease - Review Article -

Youn Suk Joo; Jae Hwan Cho

doi:10.4184/jkss.2016.23.4.239

Journal List > J Korean Soc Spine Surg > v.23(Suppl 1) > 1076111

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Joo and Cho: Basic Pelvic Parameters Associated with Lumbar Degenerative Disease - Review Article -

Review Article

Journal of Korean Spine Surg 2016;23(4):239-245.

Published online: 31 December 2016

DOI: https://doi.org/10.4184/jkss.2016.23.4.239

Basic Pelvic Parameters Associated with Lumbar Degenerative Disease - Review Article -

Youn Suk Joo, M.D., Jae Hwan Cho, M.D.

Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea

Corresponding author: Jae Hwan Cho, M.D. Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan 88, Olympic-ro 43-gil, Songpa-gu, Seoul, Korea TEL: +82-2-3010-3530, FAX: +82-2-488-7877 E-mail: spinecjh@gmail.com

Received 29 April 20168 June 2016 Accepted 23 November 2016

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Study Design

Literature review.

Objectives

The aim of this study was to present updated information on the basic pelvic parameters associated with lumbar degenerative disease.

Summary of Literature Review

Sagittal imbalance has been known to be related to a poor prognosis in almost all adult spine problems, including lumbar degenerative disease.

Materials and Methods

Review of the relevant literature.

Results

Pelvic incidence is a morphologic parameter of the pelvis. It influences lumbar lordosis and thoracic kyphosis, and determines the limitations of pelvic retroversion in sagittal imbalance. Pelvic tilt is a positional parameter of the pelvis, indicating the degree of compensation for sagittal imbalance. A C7-sagittal vertical axis >5 cm, pelvic tilt >20°, and pelvic incidence-lumbar lordosis mismatch are known to be independent factors predictive of poor outcomes.

Conclusions

The C7-sagittal vertical axis, pelvic tilt, and pelvic incidence-lumbar lordosis mismatch should be considered when surgery is planned for a patient with degenerative lumbar disease.

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Keywords: Sagittal imbalance, Sagittal vertical axis, Pelvic incidence, Pelvic tilt

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Fig. 1

시상면상 골반 인자. 골반 입사각(Pelvic incidence), 골반 경사(Pelvic tilt), 천골 경사(Sacral slope).

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Fig. 2

골반 입사각에 따른 골반의 회전(retroversion) 차이. 작은 골반 입사각에 따른 적은 골반 회전 능력(A), 큰 골반 입사각에 따른 많은 골반 회전 능력(B).

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Fig. 3.

시상면상 균형 상태(A). 시상면상 제 7경추에서 내린 수선이 제 1천추 후상방에서 5 cm 이상 전방을 통과할 경우 시상면상 불균형이 있음을 의미(B).

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Fig. 4

3년전 타병원에서 L5-S1 유합술 받고 현재 양 하지 방사통이 심해서 내원한 66세 여자 환자. 전신 측면 기립 방사선 사진상 C7-SVA 4.5 cm, 골반 경사 16도로 비교적 균형이 잘 맞는 상태로(A), MRI 시상면 검사상 제 3-4-5요추간 협착증 소견 확인되었음(B). 제 3-4-5요추체간 유합술 이후 C7-SVA는 3 cm, 요추 전만은 46도로 호전되었으며, 시상면상 균형이 잘 유지되고 증상도 호전되었음(C).

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Fig. 5

12년전 타병원에서 L4-5-S1 유합술 받고, 현재 양쪽 엉치 통증이 심해서 내원한 67세 여자 환자. 전신 측면 기립 방사선 검사상 C7-SVA 13 cm, 골반 경사 28도로 시상면상 불균형 있었던 상태이며(A), 굴곡 측면 방사선 검사상 제 3-4요추간 불안정성 있는 상태이고(B), MRI 시상면 검사상 제 3-4요추간 협착증 소견 있었음(C). 이전 기기를 제거하고, 제 3-4요추체간 유합술을 하였으나, C7-SVA가 12 cm, 골반 경사가 26도로 거의 호전이 없어, 제 3-4요추체간 불안정성은 없지만, 불편한 증상이 계속되었음(D).

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