Fabio Galbusera1, Frank Niemeyer2, Youping Tao2, Andrea Cina3, Luca Maria Sconfienza3,4, Annette Kienle5, Hans-Joachim Wilke2. 1. Laboratory of Biological Structures Mechanics, IRCCS Istituto Ortopedico Galeazzi, viale Galeazzi 4, 20161, Milan, Italy. fabio.galbusera@grupposandonato.it. 2. Institute of Orthopaedic Research and Biomechanics, Center for Trauma Research Ulm, Ulm University, Ulm, Germany. 3. Laboratory of Biological Structures Mechanics, IRCCS Istituto Ortopedico Galeazzi, viale Galeazzi 4, 20161, Milan, Italy. 4. Department of Biomedical Sciences for Health, Università Degli Studi di Milano, Milan, Italy. 5. SpineServ GmbH, Ulm, Germany.
Abstract
PURPOSE: We investigated the flexion-extension range of motion and centre of rotation of lumbar motion segments in a large population of 602 patients (3612 levels), and the associations between lumbar motion and other parameters such as sex, age and intervertebral disc degeneration. METHODS: Lumbar radiographs in flexion-extension of 602 patients suffering from low back pain and/or suspect instability were collected; magnetic resonance images were retrieved and used to score the degree of disc degeneration for a subgroup of 354 patients. Range of motion and centre of rotation were calculated for all lumbosacral levels with in-house software allowing for high degree of automation. Associations between motion parameters and age, sex, spinal level and disc degeneration were then assessed. RESULTS: The median range of motion was 6.6° (range 0.1-28.9°). Associations between range of motion and age as well as spinal level, but not sex, were found. Disc degeneration determined a consistent reduction in the range of motion. The centre of rotation was most commonly located at the centre of the lower endplate or slightly lower. With progressive degeneration, centres of rotation were increasingly dispersed with no preferential directions. CONCLUSION: This study constitutes the largest analysis of the in vivo lumbar motion currently available and covers a wide range of clinical scenarios in terms of age and degeneration. Findings confirmed that ageing determines a reduction in the mobility independently of degeneration and that in degenerative levels, centres of rotation are dispersed around the centre of the intervertebral space.
PURPOSE: We investigated the flexion-extension range of motion and centre of rotation of lumbar motion segments in a large population of 602 patients (3612 levels), and the associations between lumbar motion and other parameters such as sex, age and intervertebral disc degeneration. METHODS: Lumbar radiographs in flexion-extension of 602 patients suffering from low back pain and/or suspect instability were collected; magnetic resonance images were retrieved and used to score the degree of disc degeneration for a subgroup of 354 patients. Range of motion and centre of rotation were calculated for all lumbosacral levels with in-house software allowing for high degree of automation. Associations between motion parameters and age, sex, spinal level and disc degeneration were then assessed. RESULTS: The median range of motion was 6.6° (range 0.1-28.9°). Associations between range of motion and age as well as spinal level, but not sex, were found. Disc degeneration determined a consistent reduction in the range of motion. The centre of rotation was most commonly located at the centre of the lower endplate or slightly lower. With progressive degeneration, centres of rotation were increasingly dispersed with no preferential directions. CONCLUSION: This study constitutes the largest analysis of the in vivo lumbar motion currently available and covers a wide range of clinical scenarios in terms of age and degeneration. Findings confirmed that ageing determines a reduction in the mobility independently of degeneration and that in degenerative levels, centres of rotation are dispersed around the centre of the intervertebral space.
Entities:
Keywords:
Centre of rotation; Flexion–extension; Image registration; Instability; Range of motion
Authors: Sai-wing Lee; Kris W N Wong; Man-kwong Chan; Hon-ming Yeung; Jeffrey L F Chiu; John C Y Leong Journal: Spine (Phila Pa 1976) Date: 2002-04-15 Impact factor: 3.468
Authors: Marcel Dreischarf; Laia Albiol; Antonius Rohlmann; Esther Pries; Maxim Bashkuev; Thomas Zander; Georg Duda; Claudia Druschel; Patrick Strube; Michael Putzier; Hendrik Schmidt Journal: PLoS One Date: 2014-12-30 Impact factor: 3.240
Authors: Arjan C Y Loenen; Jérôme Noailly; Keita Ito; Paul C Willems; Jacobus J Arts; Bert van Rietbergen Journal: Front Bioeng Biotechnol Date: 2022-01-11