Spine Surgery and Related Research最新文献

{"title":"Sagittal Balance in Professional Brazilian Football Players.","authors":"Paulo Daniel Sousa Santa Cruz, Michel Kanas, Marcelo Wajchenberg","doi":"10.22603/ssrr.2023-0013","DOIUrl":"10.22603/ssrr.2023-0013","url":null,"abstract":"<p><strong>Introduction: </strong>Football soccer practice involves considerable risks of lesions, making it difficult to strike a balance between adequate preparation and the demand imposed on athletes. A high incidence of postural disorders among adolescents leads to questions about the influence of sports activity on the athletes' posture and sagittal balance.</p><p><strong>Methods: </strong>A cross-sectional study was conducted from panoramic spine radiographs of 110 professional Brazilian football (soccer) players. They were male and aged between 20 and 30 years. Measurements of pelvic incidence, pelvic tilt (PT), sacral slope, sagittal vertical axis (SVA), and lumbar lordosis were obtained by using the Surgimap^Ⓡ software. Measurement values were compared with the Brazilian literature data. Lordosis type was categorized according to the classification of Roussouly et al., and the presence of spondylolysis and spondylolisthesis was analyzed.</p><p><strong>Results: </strong>Findings indicated that (1) among 110 radiographs analyzed, 104 had appropriate measurement quality; (2) values compared with the Brazilian mean demonstrated that PT and SVA were statistically lower in professional players (P=0.013 and P=0.037, respectively); (3) according to Roussouly et al. most participants presented Type 3 lordosis (54.8%), followed by Type 4 (26.9%); (4) eight athletes (7.7%) had spondylolysis, and among them, seven (6.7%) had spondylolisthesis.</p><p><strong>Conclusions: </strong>Significant differences in PT and SVA were found in professional athletes. The most common type of lordosis was the same as that found in the general population (Type 3), and the incidence of spondylolysis and spondylolisthesis was higher than that found in the general population, but lower than that found in football (soccer) players.</p>","PeriodicalId":22253,"journal":{"name":"Spine Surgery and Related Research","volume":"1 1","pages":"504-511"},"PeriodicalIF":1.2,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10710883/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68230015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Objective Assessment of Sleep Disorders in Patients with Lumbar Spinal Stenosis Using Wearable Trackers.","authors":"Masahiro Inoue, Sumihisa Orita, Kazuhide Inage, Miyako Suzuki-Narita, Yasuhiro Shiga, Hideyuki Kinoshita, Masaki Norimoto, Tomotaka Umimura, Yawara Eguchi, Tsutomu Akazawa, Yasuchika Aoki, Yuki Shiko, Masahiko Suzuki, Yohei Kawasaki, Seiji Ohtori","doi":"10.22603/ssrr.2023-0116","DOIUrl":"10.22603/ssrr.2023-0116","url":null,"abstract":"<p><strong>Introduction: </strong>Low-back pain causes sleep disorders, which impairs the quality of life (QOL) of patients. Sleep disorders are associated with lumbar spinal stenosis (LSS); however, the postoperative effects of LSS surgery on sleep disorders are unknown. This study aimed to assess sleep disorders in patients with LSS using wearable activity trackers and determine whether surgery improves sleep quality.</p><p><strong>Methods: </strong>A total of 39 patients scheduled for LSS surgery (mean age 71.1±8.7 years; 22 men and 17 women) were studied. Sleep disorders in the participants were objectively evaluated using a wearable Motionlogger Micro system. Sleep efficiency (SEf), mean active count (MAC), and wake after sleep onset (WASO) were measured before and 6 months following surgery. Furthermore, the patient-based outcomes of pain and QOL-related scores were measured and compared with those of healthy participants. The group with improved SEf following surgery was designated as \"nonpoor sleepers,\" whereas the group that did not exhibit improvements was designated as \"poor sleepers.\" The two groups were compared based on patient factors, patient-based questionnaires, and sleep disorder measurements.</p><p><strong>Results: </strong>The SEf and WASO were significantly worse in patients with LSS compared with healthy participants (<i>P</i><0.05). Furthermore, the SEf in patients with LSS was associated with the Oswestry Disability Index scores. No improvement was observed in the SEf, MAC, and WASO before and after surgery. Evaluation of each case revealed 21 and 12 cases of nonpoor and poor sleepers, respectively. Preoperative low-back pain was significantly associated with improvement in postoperative sleep quality.</p><p><strong>Conclusions: </strong>Sleep disorders in patients with LSS were evaluated, and improvement in sleep disorders following surgery was associated with the intensity of preoperative low-back pain. Sleep disorders are associated with QOL disorders, suggesting that focusing on the treatment of sleep disorders is important in the management of patients with LSS.</p>","PeriodicalId":22253,"journal":{"name":"Spine Surgery and Related Research","volume":"1 1","pages":"533-539"},"PeriodicalIF":1.2,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10710893/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68230439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Case of Neurofibromatosis 1 with Myelopathy Due to Intracanal Rib Head and Kyphoscoliosis in an Adult.","authors":"Takuji Yamamoto, Yohshiro Nitobe, Kanichiro Wada, Gentaro Kumagai, Toru Asari, Kotaro Aburakawa, Yasuyuki Ishibashi","doi":"10.22603/ssrr.2023-0087","DOIUrl":"10.22603/ssrr.2023-0087","url":null,"abstract":"","PeriodicalId":22253,"journal":{"name":"Spine Surgery and Related Research","volume":"1 1","pages":"106-109"},"PeriodicalIF":1.2,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10853620/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68230619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of the COVID-19 Pandemic on Outcomes and Perioperative Factors Associated with Posterior Cervical Fusion.","authors":"Austen D Katz, Junho Song, Priya Duvvuri, Alex Ngan, Terence Ng, Sayyida Hasan, Sohrab Virk, Jeff Silber, David Essig","doi":"10.22603/ssrr.2023-0094","DOIUrl":"10.22603/ssrr.2023-0094","url":null,"abstract":"<p><strong>Introduction: </strong>While there is anecdotal evidence that the coronavirus disease 2019 (COVID-19) pandemic altered perioperative decision-making in patients requiring posterior cervical fusion (PCF), a national-level analysis to examine the significance of this hypothesis has not yet been conducted. This study aimed to determine the potential differences in perioperative variables and surgical outcomes of PCF performed before vs. during the COVID-19 pandemic.</p><p><strong>Methods: </strong>Adults who underwent PCF were identified in the 2019 (prepandemic) and 2020 (intrapandemic) NSQIP datasets. Differences in 30-day readmission, reoperation, and morbidity were evaluated using multivariate logistic regression. On the other hand, differences in operative time and relative value units (RVUs) were estimated using quantile regression. Furthermore, the odds ratios (OR) for length of stay (LOS) were estimated using negative binomial regression. Secondary outcomes included rates of nonhome discharge and outpatient surgery.</p><p><strong>Results: </strong>A total of 3,444 patients were included in this study (50.7% from 2020). Readmission, reoperation, morbidity, operative time, and RVUs per minute were similar between cohorts (<i>p</i>>0.05). The LOS (OR 1.086, <i>p</i><0.001) and RVUs-per-case (coefficient +0.360, <i>p</i>=0.037) were significantly greater in 2020 compared to 2019. Operation year 2020 was also associated with lower rates of nonhome discharge (22.3% vs. 25.8%, <i>p</i>=0.017) and higher rates of outpatient surgery (4.8% vs. 3.0%, <i>p</i>=0.006).</p><p><strong>Conclusions: </strong>During the COVID-19 pandemic, a 28% decreased odds of nonhome discharge following PCF and a 72% increased odds of PCF being performed in an outpatient setting were observed. The readmission, reoperation, and morbidity rates remained unchanged during this period. This is notable given that patients in the 2020 group were more frail. This suggests that patients were shifted to outpatient centers possibly to make up for potentially reduced case volume, highlighting the potential to evaluate rehabilitation-discharge criteria. Further research should evaluate these findings in more detail and on a regional basis.</p>","PeriodicalId":22253,"journal":{"name":"Spine Surgery and Related Research","volume":"1 1","pages":"29-34"},"PeriodicalIF":1.2,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10853610/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68230660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Regenerative Medicine for Spinal Cord Injury Using Induced Pluripotent Stem Cells.","authors":"Narihito Nagoshi, Keiko Sugai, Hideyuki Okano, Masaya Nakamura","doi":"10.22603/ssrr.2023-0135","DOIUrl":"10.22603/ssrr.2023-0135","url":null,"abstract":"<p><p>Spinal cord injury (SCI) is a devastating injury that causes permanent neurological dysfunction. To develop a new treatment strategy for SCI, a clinical trial of transplantation of human-induced pluripotent stem cell-derived neural precursor cells (NPCs) in patients in the subacute phase of SCI was recently initiated. The formation of synaptic connections with host neural tissues is one of the therapeutic mechanisms of cell transplantation, and this beneficial efficacy has been directly demonstrated using a chemogenetic tool. This research focuses on the establishment of cell therapy for chronic SCI, which is more challenging owing to cavity and scar formation. Thus, neurogenic NPC transplantation is more effective in forming functional synapses with the host neurons. Furthermore, combinatory rehabilitation therapy is useful to enhance the efficacy of this strategy, and a valid rehabilitative training program has been established for SCI animal models that received NPC transplantation in the chronic phase. Therefore, the use of regenerative medicine for chronic SCI is expected to increase.</p>","PeriodicalId":22253,"journal":{"name":"Spine Surgery and Related Research","volume":"1 1","pages":"22-28"},"PeriodicalIF":1.2,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10853617/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68231072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Postoperative Epidural Fibrosis: Challenges and Opportunities - A Review.","authors":"Guido Lewik, Gerrit Lewik, Lena S Müller, Alexander von Glinski, Tobias L Schulte, Tobias Lange","doi":"10.22603/ssrr.2023-0106","DOIUrl":"10.22603/ssrr.2023-0106","url":null,"abstract":"<p><p>Postoperative epidural fibrosis (EF) is still a major limitation to the success of spine surgery. Fibrotic adhesions in the epidural space, initiated via local trauma and inflammation, can induce difficult-to-treat pain and constitute the main cause of failed back surgery syndrome, which not uncommonly requires operative revision. Manifold agents and methods have been tested for EF relief in order to mitigate this longstanding health burden and its socioeconomic consequences. Although several promising strategies could be identified, few have thus far overcome the high translational hurdle, and there has been little change in standard clinical practice. Nonetheless, notable research progress in the field has put new exciting avenues on the horizon. In this review, we outline the etiology and pathogenesis of EF, portray its clinical and surgical presentation, and critically appraise current efforts and novel approaches toward enhanced prevention and treatment.</p>","PeriodicalId":22253,"journal":{"name":"Spine Surgery and Related Research","volume":"1 1","pages":"133-142"},"PeriodicalIF":1.2,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11007250/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68230369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rates and Characteristics of Patients Leaving against Medical Advice after Spine Surgery.","authors":"Abdullah Ghali, David Momtaz, Travis Kotzur, Rishi Gonuguntla, Rebecca Wang, Alan C Santiago-Rodriquez, Eileen N Phan, Ali Seifi, Darrell Hanson","doi":"10.22603/ssrr.2023-0113","DOIUrl":"10.22603/ssrr.2023-0113","url":null,"abstract":"<p><strong>Introduction: </strong>Leaving against medical advice (AMA) has been associated with higher rates of readmission and worse postoperative outcomes in various surgical fields. Patients who have undergone spine surgery often require careful postoperative follow-up to ensure an uncomplicated recovery. In this study, we aim to investigate the demographic and hospital variables that may have contributed to patients leaving the hospital AMA following spine surgery.</p><p><strong>Methods: </strong>We performed a retrospective analysis of patients receiving spine surgery; we used the data from the Healthcare Cost and Utilization Project (HCUP) database for the years 2011-2020. Demographics, household income status, insurance status, time from admission to operation, length of stay, length of recovery, and discharge disposition were collected and analyzed. Multivariate linear regression was used to determine the odds ratios of each factor and their association to patient decision of leaving AMA.</p><p><strong>Results: </strong>As per our findings, patients aged 30-49 had 1.666 times greater odds of leaving AMA following spine surgery (P<0.001), patients aged 50-64 had 1.222 times greater odds of leaving AMA (P=0.001), and patients older than 65 had 0.490 times lesser odds of leaving AMA (P<0.001). Additionally, black patients were 1.612 times more likely to leave AMA (P<0.001), whereas white patients were 0.675 times less likely to do so (<0.001). Women were 0.555 times less likely to leave AMA than the rest of the population (P<0.001). Moreover, patients with private insurance were 0.268 times less likely to leave AMA (P<0.001), while patients on Medicare and Medicaid were 1.692 times (P<0.001) and 3.958 times more likely to leave AMA (P<0.001) following spine surgery, respectively. Finally, patients in the lowest quartile of income were 1.691 times more likely to leave AMA (P<0.001), while patients in the higher quartile of income were 0.521 times less likely to do so (P<0.001).</p><p><strong>Conclusions: </strong>It is critical that spine surgeons are aware of the factors that predispose patients to leave AMA in order to mitigate postoperative complications.</p>","PeriodicalId":22253,"journal":{"name":"Spine Surgery and Related Research","volume":"1 1","pages":"43-50"},"PeriodicalIF":1.2,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10853619/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68230424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Managing Disease-Modifying Antirheumatic Drugs (DMARDs) for Patients Undergoing Elective Spine Surgery: A Pilot Survey.","authors":"James C Mamaril-Davis, Pedro Aguilar-Salinas, Salvador Fabián Gutiérrez Aguirre, Mauricio J Avila, Michel Villatoro-Villar, Katherine Riordan, Travis M Dumont","doi":"10.22603/ssrr.2023-0099","DOIUrl":"10.22603/ssrr.2023-0099","url":null,"abstract":"<p><strong>Introduction: </strong>Patients affected by autoimmune pathologies such as rheumatoid arthritis require surgery for various reasons. However, the systemic inflammatory nature of these disease processes often necessitates therapy with disease-modifying antirheumatic drugs (DMARDs). Alteration of these agents in the perioperative period for surgery requires a careful risk-benefit analysis to limit disease flares, infection rates, and secondary revisions. We therefore queried North and South American practices for perioperative management of DMARDs in patients undergoing elective spine surgery.</p><p><strong>Methods: </strong>An institutional review board-approved pilot survey was disseminated to spine surgeons regarding how they managed DMARDs before, during, and after spine surgery.</p><p><strong>Results: </strong>A total of 47 spine surgeons responded to the survey, 37 of whom were neurosurgeons (78.7%) and 10 orthopedic surgeons (21.3%). Of the respondents, 80.9% were from North America, 72.3% were board-certified, 51.1% practiced in academic institutions, and 66.0% performed 50-150 spine surgeries per year. Most respondents consulted a rheumatologist before continuing or withholding a DMARD in the perioperative period (70.2%). As such, a majority of the spine surgeons in this survey withheld DMARDs at an average of 13.8 days before and 19.6 days after spine surgery. Of the spine surgeons who withheld DMARDs before and after spine surgery, the responses were variable with a trend toward no increased risk of postoperative complications.</p><p><strong>Conclusions: </strong>Based on the results of this pilot survey, we found a consensus among spine surgeons to withhold DMARDs before and after elective spine surgery.</p>","PeriodicalId":22253,"journal":{"name":"Spine Surgery and Related Research","volume":"1 1","pages":"35-42"},"PeriodicalIF":1.2,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10853614/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68230703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Association of Pars Defect Type with Clinical Outcome after Smiley Face Rod Methods for Terminal-Stage Spondylolysis.","authors":"Shun Okuwaki, Masaki Tatsumura, Hisanori Gamada, Reo Asai, Katsuya Nagashima, Yosuke Takeuchi, Toru Funayama, Masashi Yamazaki","doi":"10.22603/ssrr.2023-0084","DOIUrl":"10.22603/ssrr.2023-0084","url":null,"abstract":"<p><strong>Introduction: </strong>The smiley face rod method is an effective treatment for symptomatic terminal-stage spondylolysis. However, the risk factors for treatment failure are unknown. We investigated the association of pars defect type with the treatment outcomes of this method.</p><p><strong>Methods: </strong>We retrospectively examined data from 34 patients (18.0±6.7 years) with terminal-stage spondylolysis who underwent surgery using the smiley face rod method. The mean follow-up period was 44.9±21.4 months. The patients were divided into 2 groups: pars defect without bone atrophy or sclerosis (group A; 18 patients), and with bone atrophy and sclerosis (group B; 16 patients). We evaluated and compared the visual analog scale (VAS) score for back pain, bone union rate, and time to return to preinjury athletics level between the groups. Fisher exact and paired <i>t</i> tests were used to compare the variables between groups. The VAS score between the groups was compared using a 2-factor repeated-measures analysis of variance.</p><p><strong>Results: </strong>Within groups, the VAS score was significantly different over time (<i>p</i><0.001). The VAS scores between groups were not significantly different. Patients in group A had a significantly higher bone union rate per pars at 6 months (group A, 65.7%; and group B, 37.5%, <i>p</i>=0.028) and 24 months after surgery (group A, 97.1%; and group B, 75.0%, <i>p</i>=0.011). All patients returned to their respective sports, and no significant differences were observed in the time to return to preinjury athletics level between the groups (<i>p</i>=0.055).</p><p><strong>Conclusions: </strong>The type of pars defect are associated with bone union after the smiley face rod method, but have little effect on postoperative symptoms.</p>","PeriodicalId":22253,"journal":{"name":"Spine Surgery and Related Research","volume":"1 1","pages":"58-65"},"PeriodicalIF":1.2,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10853615/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68230606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Wedge-Shaped Deformity of the First Sacral Vertebra Associated with Adolescent Idiopathic Scoliosis: A Comparison of Cases with and without Scoliosis.","authors":"Ippei Yamauchi, Hiroaki Nakashima, Sadayuki Ito, Naoki Segi, Jun Ouchida, Ryoji Tauchi, Tetsuya Ohara, Noriaki Kawakami, Shiro Imagama","doi":"10.22603/ssrr.2023-0134","DOIUrl":"10.22603/ssrr.2023-0134","url":null,"abstract":"<p><strong>Introduction: </strong>Scoliosis is the three-dimensional (3D) deformity of the spine. Scoliosis curvatures, such as the lower lumbar curve and the angle of the upper endplate of the sacrum observable on radiographs, are associated with postoperative outcomes; however, the relationship between postoperative outcomes and sacral morphology remains unknown. This study aimed to investigate sacral morphology in patients with adolescent idiopathic scoliosis (AIS) and to clarify its relationship with wedge-shaped deformity of the first sacral vertebra and radiographic parameters.</p><p><strong>Methods: </strong>This study included 94 patients who underwent fusion surgery for AIS (scoliosis group). As the control group, 25 patients without scoliosis (<10°) under 50 years of age were also investigated. S1 wedging angle (S1WA) using 3D Computed tomography (CT) and Cobb angle, L4 tilt, and sacral slanting using radiography were measured. The relationship between S1WA and other radiographic parameters was analyzed using correlation coefficients. Differences in sacral morphology between the Lenke lumbar modifier types A and C were also investigated.</p><p><strong>Results: </strong>S1WA was significantly larger in the scoliosis group than the control group (scoliosis: 1.7°±2.5°, control: 0.1°±1.5°, p=0.002). Furthermore, the number of patients with S1WA >3° or >5° was significantly higher in the scoliosis group (>3°: 33%, 8%, p=0.012; >5°: 16%, 0%, p=0.039). S1WA correlated with sacral slanting (r=0.45, p<0.001) and L4 tilt (r=0.35, p<0.001) and was significantly greater with Lenke lumbar modifier C than A (2.4°±2.6°, 0.8°±2.0°; p<0.001).</p><p><strong>Conclusions: </strong>The S1 vertebra was deformed and wedge-shaped in AIS, especially in cases with a large lumbar curve. Additionally, S1WA is associated with sacral slanting and L4 tilt on radiography in AIS.</p>","PeriodicalId":22253,"journal":{"name":"Spine Surgery and Related Research","volume":"1 1","pages":"540-546"},"PeriodicalIF":1.2,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10710889/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68231059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}