Article
Clinical Neurology
Priya Duvvuri, Renaud Lafage, Mathieu Bannwarth, Peter Passias, Shay Bess, Justin S. Smith, Eric Klineberg, Han Jo Kim, Christopher Shaffrey, Douglas Burton, Munish Gupta, Themistocles Protopsaltis, Christopher Ames, Frank Schwab, Virginie Lafage
Summary: This study investigates the shape of the fused spine after T10-pelvis fusion in patients with adult spinal deformity and explores its association with proximal junctional kyphosis. The results show that VPAs are reliable in reproducing the true, post-operative spine shape and can be used for pre- and intra-operative planning to ensure optimal alignment.
GLOBAL SPINE JOURNAL
(2023)
Article
Medicine, General & Internal
Chahyun Oh, Minwook Lee, Boohwi Hong, Byong-Sop Song, Sangwon Yun, Sanghun Kwon, Youngkwon Ko, Sun Yeul Lee, Chan Noh
Summary: Prolonged neck flexion is believed to cause harmful loading on the cervical spine. This study found a significant association between C2-7 absolute rotational angle (ARA) and degenerative cervical spondylosis (DCS) score. The correlation between increased DCS score and older age was more pronounced in patients with kyphotic cervical alignment.
JOURNAL OF CLINICAL MEDICINE
(2022)
Article
Biology
Brittany Stott, Mark Driscoll
Summary: The geometric alignment of the spine affects stability, biomechanical loading, and pain. Variations in sagittal curvature can lead to different load distributions and range of motion. Finite element modeling reveals that excessive curvatures result in greater stress and reduced disc height, while straighter spines reduce stress. Considering patient-specific sagittal profiles in biomechanical analyses and treatments can provide valuable insights.
COMPUTERS IN BIOLOGY AND MEDICINE
(2023)
Article
Clinical Neurology
Changyu Pan, Guodong Wang, Yunchao Li, Lei Kuang, Jianmin Sun, Guohua Lv
Summary: This study aimed to establish multiple linear regressions of global tilt (GT) based on individual thoracic kyphosis (TK), lumbar lordosis (LL) and pelvic incidence (PI) in patients with degenerative spines. The results showed that GT was correlated with TK, LL and PI, and these factors were significant predictors for the models of GT, pelvic tilt (PT) and sagittal vertical axis (SVA), allowing for a more precise correction strategy in degenerative spine conditions.
EUROPEAN SPINE JOURNAL
(2021)
Article
Clinical Neurology
Tanvir Johanning Bari, Martin Heegaard, Rachid Bech-Azeddine, Benny Dahl, Martin Gehrchen
Summary: The study found that hypolordotic lordosis maldistribution (LDI < 50) in instrumented lumbar fusion surgery was associated with an increased risk of revision surgery, increased postoperative pelvic tilt and pelvic incidence minus lumbar lordosis mismatch. Lordosis distribution should be carefully considered prior to spinal fusion, especially in patients with high pelvic incidence.
Article
Computer Science, Interdisciplinary Applications
Robert Rockenfeller, Andreas Mueller
Summary: This study presents a method to enhance and standardize the analysis of spinal shapes in three dimensions. By representing the whole spine using a Bezier curve and employing differential-geometric methods, curvature and torsion information at each spinal level and in between can be obtained. The results show that these quantities vary with individual posture and during motion, emphasizing the need for individualizable identification and classification of spinal deformities.
COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE
(2022)
Article
Clinical Neurology
Zeeshan M. Sardar, Meghan Cerpa, Fthimnir Hassan, Michael Kelly, Jean-Charles Le Huec, Stephane Bourret, Kazuhiro Hasegawa, Hee-Kit Wong, Gabriel Liu, Hwee Weng Dennis Hey, Hend Riahi, Lawrence Lenke
Summary: This study aims to assess normative values of sagittal spinal and lower extremity alignment in asymptomatic volunteers stratified by age and gender. The results showed slow and steady changes in sagittal alignment parameters with age, and volunteers used compensatory mechanisms to maintain an aligned posture.
Article
Clinical Neurology
Bailey O'Connor, Caroline E. Drolet, Jean-Christophe A. Leveque, Venu Nemani, Katie L. Krause, Michael Dorsi, Samuel Schroerlucke, Jesse Shen, Philip K. Louie
Summary: This retrospective study compared the 6-month postoperative radiographic outcomes of lumbar spine in patients undergoing transforaminal (TLIF), posterior (PLIF), anterior (ALIF), and lateral (LLIF) interbody fusions. The results showed that ALIF/LLIF procedures resulted in improved segmental lordosis and reduced pelvic incidence to lumbar lordosis (PI-LL) mismatch compared to TLIF/PLIF procedures. Additionally, ALIF/LLIF procedures decreased lordosis at adjacent levels, leading to a more neutral position.
Article
Clinical Neurology
Austin Q. Nguyen, Jackson P. Harvey, Vincent P. Federico, Michael T. Nolte, Krishn Khanna, Sapan D. Gandhi, Evan D. Sheha, Matthew W. Colman, Frank M. Phillips
Summary: This study aimed to examine the effects of L5-S1 anterior lumbar interbody fusion on segmental, adjacent-level, and global lordosis. The results showed that an increase in segmental lordosis following the fusion procedure significantly increased global lordosis, but also caused a decrease in adjacent-level lordosis. This suggests that an increase in segmental lordosis may lead to a compensatory loss of lordosis at the adjacent level.
GLOBAL SPINE JOURNAL
(2023)
Article
Clinical Neurology
Changyu Pan, Bourghli Anouar, Yunchao Li, Lei Li, Lei Kuang, Bing Wang, Jianmin Sun, Guohua Lv, Ibrahim Obeid
Summary: This study investigates the correlations between thoracic kyphosis (TK) and lumbar lordosis (LL) parameters in asymptomatic adults and proposes corresponding linear regression models. The results show statistically significant correlations between TK and LL, and TK morphology can be predicted based on LL parameters. These findings are important for guiding adult spinal deformity surgery.
EUROPEAN SPINE JOURNAL
(2023)
Article
Orthopedics
Samir Smajic, Aleksandar Vujadinovic, Adnan Kasapovic, Dakheel A. Aldakheel, Yann Philippe Charles, Axel Walter, Jean-Paul Steib, Nicola Maffulli, Filippo Migliorini, Alice Baroncini
Summary: The study showed that Mobidisc implantation led to improvement in lumbar lordosis (LL) and segmental lordosis (SL) at the treated level, with an increase in both anterior and posterior disc height. However, disc height at the adjacent level decreased.
JOURNAL OF ORTHOPAEDIC SURGERY AND RESEARCH
(2022)
Article
Medicine, General & Internal
Sang-Kyu Im, Ki Young Lee, Hae Seong Lim, Dong Uk Suh, Jung-Hee Lee
Summary: In surgical correction of adult spinal deformity, pelvic incidence-lumbar lordosis plays a key role in restoring normal sagittal alignment, with postoperative lordosis morphology being an important factor in preventing mechanical complications. Optimal alignment was achieved in 85.5% of patients, with postoperative PI-LL significantly associated with last follow-up sagittal vertical axis, emphasizing the importance of proportional lordosis correction based on individual spinopelvic alignment.
JOURNAL OF CLINICAL MEDICINE
(2021)
Article
Clinical Neurology
Mustafa Tekeli, Huseyin Erdem, Nazire Kilic, Neslihan Boyan, Ozkan Oguz, Roger W. Soames
Summary: The purpose of this study was to evaluate lumbar lordosis (LL) in symptomatic individuals using six different techniques and compare the techniques. The results showed that the mean lumbar lordosis values of symptomatic participants were lower than those of asymptomatic individuals in previous studies, and there was no significant difference in lumbar lordosis values in terms of gender and age in symptomatic individuals. Based on statistical findings, the Risser Ferguson technique can be used to assess LL.
EUROPEAN SPINE JOURNAL
(2023)
Article
Orthopedics
Jiwoon Lim, Dajeong Lee, Sangyoung Kim, Seungeun Lee, Ju Seok Ryu
Summary: This study aimed to detect the differences in cervical muscle activation patterns in people with versus without cervical lordosis and explore the possible mechanism of cervical pain originating therein. The study found that in patients with loss of normal cervical alignment, the upper trapezius muscle and rhomboid muscles showed reduced muscle activation, while the upper trapezius muscle exhibited over-firing, possibly increasing the risk of neck musculoskeletal pain.
BMC MUSCULOSKELETAL DISORDERS
(2023)
Article
Clinical Neurology
Hai Le, Ryan Anderson, Eileen Phan, Joseph Wick, Joshua Barber, Rolando Roberto, Eric Klineberg, Yashar Javidan
Summary: The study compared outcomes of open versus minimally invasive transforaminal lumbar interbody fusion (MIS-TLIF) with bilateral facetectomies in age- and sex-matched cohort. The MIS-TLIF group had reduced estimated blood loss and lack of subfascial drain use, but longer operative time compared to the open-TLIF group. Both groups showed improvements in Visual Analog Scale and Oswestry Disability Index, with MIS-TLIF providing slightly better restoration of lumbar lordosis.
GLOBAL SPINE JOURNAL
(2021)
