{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,22]],"date-time":"2026-09-22T20:49:10Z","timestamp":1790110150302,"version":"4.0.1"},"reference-count":26,"publisher":"Springer Science and Business Media LLC","issue":"1","license":[{"start":{"date-parts":[[2023,4,4]],"date-time":"2023-04-04T00:00:00Z","timestamp":1680566400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2023,4,4]],"date-time":"2023-04-04T00:00:00Z","timestamp":1680566400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Sci Rep"],"abstract":"<jats:title>Abstract<\/jats:title><jats:p>To elucidate the changes in coronal lumbar-pelvic-femoral alignment after conversion total hip arthroplasty (THA) in patients with unilateral ankylosed hip. A retrospective radiologic study of 48 patients (48 hips) with unilateral hip arthrodesis who underwent conversion THA was conducted. Cobb\u2019s angle of lumbar scoliosis (LS), the pelvic obliquity (PO) angle, and the hip adduction angle (HAA) on standing anterior\u2013posterior spine-pelvis-hip radiographs were measured before and after THA. The differences of LS, PO, and HAA before and after THA were defined as \u0394LS, \u0394PO, and \u0394HAA, respectively. A paired samples t-test or the Wilcoxon signed-rank test were used to compare the absolute values of the LS, PO, and HAA between preoperative and postoperative groups. The Pearson\u2019s correlation coefficient (r) or Spearman\u2019s correlation coefficient (\u03c1) was calculated to assess the relationship between \u0394LS, \u0394PO, and \u0394HAA and possible associated factors. Significant differences were found in the preoperative LS (mean, 10.8\u00b0 vs. 8.2\u00b0, p\u2009=\u20090.004), PO (median, 6.8\u00b0 vs. 2.0\u00b0, p\u2009&lt;\u20090.001), and HAA (median, 10.0\u00b0 vs. 6.0\u00b0, p\u2009=\u20090.003). \u0394LS was correlated with the preoperative LS (\u03c1\u2009=\u2009\u00a0\u2212\u00a00.621, p\u2009&lt;\u20090.001), PO (\u03c1\u2009=\u2009\u00a0\u2212\u00a00.580, p\u2009&lt;\u20090.001), and HAA (\u03c1\u2009=\u2009\u00a0\u2212\u00a00.467, p\u2009&lt;\u20090.001). \u0394PO was correlated with the preoperative LS (r\u2009=\u2009\u00a0\u2212\u00a00.596, p\u2009&lt;\u20090.001), PO (\u03c1\u2009=\u2009\u00a0\u2212\u00a00.892, p\u2009&lt;\u20090.001), and HAA (\u03c1\u2009=\u2009\u00a0\u2212\u00a00.728, p\u2009&lt;\u20090.001). \u0394HAA was correlated with the preoperative LS (r\u2009=\u2009\u00a0\u2212\u00a00.583, p\u2009&lt;\u20090.001), PO (\u03c1\u2009=\u2009\u00a0\u2212\u00a00.751, p\u2009&lt;\u20090.001), and HAA (\u03c1\u2009=\u2009\u00a0\u2212\u00a00.824, p\u2009&lt;\u20090.001). LS, PO, and HAA were significantly improved after conversion THA. Greater improvement in LS, PO, and HAA can be expected in patients with larger preoperative LS, PO, and HAA values.\n<\/jats:p>","DOI":"10.1038\/s41598-023-32672-8","type":"journal-article","created":{"date-parts":[[2023,4,6]],"date-time":"2023-04-06T00:40:39Z","timestamp":1680741639000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Changes of the coronal lumbar-pelvic-femoral alignment after conversion total hip arthroplasty in patients with unilateral ankylosed hip"],"prefix":"10.1038","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2319-5440","authenticated-orcid":false,"given":"Takaomi","family":"Kobayashi","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3359-9684","authenticated-orcid":false,"given":"Tadatsugu","family":"Morimoto","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3114-1685","authenticated-orcid":false,"given":"Hirohito","family":"Hirata","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tomohito","family":"Yoshihara","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0688-0451","authenticated-orcid":false,"given":"Masatsugu","family":"Tsukamoto","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7786-8957","authenticated-orcid":false,"given":"Motoki","family":"Sonohata","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Masaaki","family":"Mawatari","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2023,4,4]]},"reference":[{"issue":"1","key":"32672_CR1","doi-asserted-by":"publisher","first-page":"37","DOI":"10.22603\/ssrr.2019-0008","volume":"4","author":"T Morimoto","year":"2019","unstructured":"Morimoto, T. et al. Hip-spine syndrome: The coronal alignment of the lumbar spine and pelvis in patients with ankylosed hips. Spine Surg. Relat. Res. 4(1), 37\u201342. https:\/\/doi.org\/10.22603\/ssrr.2019-0008 (2019).","journal-title":"Spine Surg. Relat. Res."},{"issue":"9","key":"32672_CR2","doi-asserted-by":"publisher","first-page":"1596","DOI":"10.1016\/j.arth.2013.01.025","volume":"28","author":"S Jain","year":"2013","unstructured":"Jain, S. & Giannoudis, P. V. Arthrodesis of the hip and conversion to total hip arthroplasty: A systematic review. J. Arthroplast. 28(9), 1596\u20131602. https:\/\/doi.org\/10.1016\/j.arth.2013.01.025 (2013).","journal-title":"J. Arthroplast."},{"issue":"6","key":"32672_CR3","doi-asserted-by":"publisher","first-page":"853","DOI":"10.2106\/00004623-198466060-00005","volume":"66","author":"PD Sponseller","year":"1984","unstructured":"Sponseller, P. D., McBeath, A. A. & Perpich, M. Hip arthrodesis in young patients: A long-term follow-up study. J. Bone Jt. Surg. Am. 66(6), 853\u2013859. https:\/\/doi.org\/10.2106\/00004623-198466060-00005 (1984).","journal-title":"J. Bone Jt. Surg. Am."},{"issue":"2","key":"32672_CR4","doi-asserted-by":"publisher","first-page":"129","DOI":"10.1007\/BF00266374","volume":"13","author":"M Sofue","year":"1989","unstructured":"Sofue, M., Kono, S., Kawaji, W. & Homma, M. Long term results of arthrodesis for severe osteoarthritis of the hip in young adults. Int. Orthop. 13(2), 129\u2013133. https:\/\/doi.org\/10.1007\/BF00266374 (1989).","journal-title":"Int. Orthop."},{"issue":"1","key":"32672_CR5","doi-asserted-by":"publisher","first-page":"89","DOI":"10.1016\/s0883-5403(06)80015-x","volume":"5","author":"CS Roberts","year":"1990","unstructured":"Roberts, C. S. & Fetto, J. F. Functional outcome of hip fusion in the young patient. Follow-up study of 10 patients. J. Arthroplast. 5(1), 89\u201396. https:\/\/doi.org\/10.1016\/s0883-5403(06)80015-x (1990).","journal-title":"J. Arthroplast."},{"issue":"2","key":"32672_CR6","doi-asserted-by":"publisher","first-page":"171","DOI":"10.1016\/0883-5403(94)90066-3","volume":"9","author":"WW Brien","year":"1994","unstructured":"Brien, W. W., Golz, R. J., Kuschner, S. H., Brien, E. W. & Wiss, D. A. Hip joint arthrodesis utilizing anterior compression plate fixation. J. Arthroplast. 9(2), 171\u2013176. https:\/\/doi.org\/10.1016\/0883-5403(94)90066-3 (1994).","journal-title":"J. Arthroplast."},{"issue":"6","key":"32672_CR7","first-page":"779","volume":"74","author":"JM Kirkos","year":"2008","unstructured":"Kirkos, J. M., Papavasiliou, K. A., Kyrkos, M. J., Sayegh, F. E. & Kapetanos, G. A. The long-term effects of hip fusion on the adjacent joints. Acta Orthop. Belg. 74(6), 779\u2013787 (2008).","journal-title":"Acta Orthop. Belg."},{"issue":"6","key":"32672_CR8","doi-asserted-by":"publisher","first-page":"727","DOI":"10.1007\/s00776-009-1390-3","volume":"14","author":"E Rutz","year":"2009","unstructured":"Rutz, E., Sch\u00e4fer, D. & Valderrabano, V. Total hip arthroplasty after hip joint ankylosis. J. Orthop. Sci. 14(6), 727\u2013731. https:\/\/doi.org\/10.1007\/s00776-009-1390-3 (2009).","journal-title":"J. Orthop. Sci."},{"issue":"11","key":"32672_CR9","doi-asserted-by":"publisher","first-page":"2880","DOI":"10.1007\/s11999-009-1027-z","volume":"467","author":"ED Peterson","year":"2009","unstructured":"Peterson, E. D., Nemanich, J. P., Altenburg, A. & Cabanela, M. E. Hip arthroplasty after previous arthrodesis. Clin. Orthop. Relat. Res. 467(11), 2880\u20132885. https:\/\/doi.org\/10.1007\/s11999-009-1027-z (2009).","journal-title":"Clin. Orthop. Relat. Res."},{"issue":"7","key":"32672_CR10","doi-asserted-by":"publisher","first-page":"1971","DOI":"10.1007\/s11999-010-1704-y","volume":"469","author":"M Fernandez-Fairen","year":"2011","unstructured":"Fernandez-Fairen, M., Murcia-Maz\u00f3n, A., Torres, A., Querales, V. & Murcia, A. Jr. Is total hip arthroplasty after hip arthrodesis as good as primary arthroplasty?. Clin. Orthop. Relat. Res. 469(7), 1971\u20131983. https:\/\/doi.org\/10.1007\/s11999-010-1704-y (2011).","journal-title":"Clin. Orthop. Relat. Res."},{"issue":"3","key":"32672_CR11","doi-asserted-by":"publisher","first-page":"409","DOI":"10.1016\/j.arth.2010.02.005","volume":"26","author":"CJ Richards","year":"2011","unstructured":"Richards, C. J. & Duncan, C. P. Conversion of hip arthrodesis to total hip arthroplasty: Survivorship and clinical outcome. J. Arthroplast. 26(3), 409\u2013413. https:\/\/doi.org\/10.1016\/j.arth.2010.02.005 (2011).","journal-title":"J. Arthroplast."},{"key":"32672_CR12","doi-asserted-by":"publisher","first-page":"36","DOI":"10.1302\/0301-620X.94B11.30615","volume":"94","author":"J Aderinto","year":"2012","unstructured":"Aderinto, J., Lulu, O. B., Backstein, D. J., Safir, O. & Gross, A. E. Functional results and complications following conversion of hip fusion to total hip replacement. J. Bone Jt. Surg. Br. 94, 36\u201341. https:\/\/doi.org\/10.1302\/0301-620X.94B11.30615 (2012).","journal-title":"J. Bone Jt. Surg. Br."},{"issue":"Suppl 2","key":"32672_CR13","doi-asserted-by":"publisher","first-page":"S4","DOI":"10.1186\/1748-7161-10-S2-S4","volume":"10","author":"Y Abe","year":"2015","unstructured":"Abe, Y., Sato, S., Abe, S., Masuda, T. & Yamada, K. The impact of the leg-lengthening total hip arthroplasty on the coronal alignment of the spine. Scoliosis 10(Suppl 2), S4. https:\/\/doi.org\/10.1186\/1748-7161-10-S2-S4 (2015).","journal-title":"Scoliosis"},{"issue":"1","key":"32672_CR14","doi-asserted-by":"publisher","first-page":"3","DOI":"10.1186\/1748-7161-1-3","volume":"1","author":"MC Hawes","year":"2006","unstructured":"Hawes, M. C. & O\u2019brien JP,. The transformation of spinal curvature into spinal deformity: Pathological processes and implications for treatment. Scoliosis 1(1), 3. https:\/\/doi.org\/10.1186\/1748-7161-1-3 (2006).","journal-title":"Scoliosis"},{"key":"32672_CR15","doi-asserted-by":"publisher","first-page":"108","DOI":"10.1016\/j.gaitpost.2016.06.020","volume":"49","author":"K Allison","year":"2016","unstructured":"Allison, K. et al. Single leg stance control in individuals with symptomatic gluteal tendinopathy. Gait Posture 49, 108\u2013113. https:\/\/doi.org\/10.1016\/j.gaitpost.2016.06.020 (2016).","journal-title":"Gait Posture"},{"issue":"2","key":"32672_CR16","doi-asserted-by":"publisher","first-page":"299","DOI":"10.1016\/j.arth.2011.09.022","volume":"27","author":"X Zhou","year":"2012","unstructured":"Zhou, X. et al. Effect of pelvic obliquity on the orientation of the acetabular component in total hip arthroplasty. J. Arthroplasty. 27(2), 299\u2013304. https:\/\/doi.org\/10.1016\/j.arth.2011.09.022 (2012).","journal-title":"J. Arthroplasty."},{"issue":"4","key":"32672_CR17","doi-asserted-by":"publisher","first-page":"452","DOI":"10.1007\/s00776-010-1490-0","volume":"15","author":"M Kuribayashi","year":"2010","unstructured":"Kuribayashi, M. et al. Reliability and validity of the Japanese Orthopaedic Association hip score. J. Orthop Sci. 15(4), 452\u2013458. https:\/\/doi.org\/10.1007\/s00776-010-1490-0 (2010).","journal-title":"J. Orthop Sci."},{"issue":"1","key":"32672_CR18","doi-asserted-by":"publisher","first-page":"231","DOI":"10.1519\/15184.1","volume":"19","author":"JP Weir","year":"2005","unstructured":"Weir, J. P. Quantifying test-retest reliability using the intraclass correlation coefficient and the SEM. J. Strength Cond. Res. 19(1), 231\u2013240. https:\/\/doi.org\/10.1519\/15184.1 (2005).","journal-title":"J. Strength Cond. Res."},{"issue":"5","key":"32672_CR19","doi-asserted-by":"publisher","first-page":"1763","DOI":"10.1213\/ANE.0000000000002864","volume":"126","author":"P Schober","year":"2018","unstructured":"Schober, P., Boer, C. & Schwarte, L. A. Correlation coefficients: Appropriate use and interpretation. Anesth. Analg. 126(5), 1763\u20131768. https:\/\/doi.org\/10.1213\/ANE.0000000000002864 (2018).","journal-title":"Anesth. Analg."},{"issue":"10","key":"32672_CR20","doi-asserted-by":"publisher","first-page":"925","DOI":"10.1007\/s00586-005-1053-9","volume":"14","author":"M Aebi","year":"2005","unstructured":"Aebi, M. The adult scoliosis. Eur. Spine. J. 14(10), 925\u2013948. https:\/\/doi.org\/10.1007\/s00586-005-1053-9 (2005).","journal-title":"Eur. Spine. J."},{"issue":"14","key":"32672_CR21","doi-asserted-by":"publisher","first-page":"1650","DOI":"10.1097\/01.brs.0000169446.69758.fa","volume":"30","author":"H Yoshimoto","year":"2005","unstructured":"Yoshimoto, H. et al. Spinopelvic alignment in patients with osteoarthrosis of the hip: A radiographic comparison to patients with low back pain. Spine (Phila Pa 1976) 30(14), 1650\u20131657. https:\/\/doi.org\/10.1097\/01.brs.0000169446.69758.fa (2005).","journal-title":"Spine (Phila Pa 1976)"},{"issue":"2","key":"32672_CR22","doi-asserted-by":"publisher","first-page":"190","DOI":"10.1302\/0301-620x.79b2.7052","volume":"79","author":"DY Lee","year":"1997","unstructured":"Lee, D. Y., Choi, I. H., Chung, C. Y., Cho, T. J. & Lee, J. C. Fixed pelvic obliquity after poliomyelitis: Classification and management. J. Bone Jt. Surg. Br. 79(2), 190\u2013196. https:\/\/doi.org\/10.1302\/0301-620x.79b2.7052 (1997).","journal-title":"J. Bone Jt. Surg. Br."},{"issue":"2","key":"32672_CR23","doi-asserted-by":"publisher","first-page":"217","DOI":"10.2106\/00004623-197860020-00014","volume":"60","author":"G Lewinnek","year":"1978","unstructured":"Lewinnek, G. & Lewis, J. Dislocations after total hip replacement arthroplasties. J. Bone Jt. Surg. Am. 60(2), 217 (1978).","journal-title":"J. Bone Jt. Surg. Am."},{"issue":"5","key":"32672_CR24","doi-asserted-by":"publisher","first-page":"221","DOI":"10.2519\/jospt.2003.33.5.221","volume":"33","author":"RJ Brady","year":"2003","unstructured":"Brady, R. J., Dean, J. B., Gross, S. T. M. & MT,. Lint length inequality: Clinical implications for assessment and intervention. J. Orthop. Sports Pkys. Thor. 33(5), 221\u2013234. https:\/\/doi.org\/10.2519\/jospt.2003.33.5.221 (2003).","journal-title":"J. Orthop. Sports Pkys. Thor."},{"issue":"4","key":"32672_CR25","doi-asserted-by":"publisher","first-page":"697","DOI":"10.1007\/s00264-011-1313-8","volume":"36","author":"H Bangjian","year":"2012","unstructured":"Bangjian, H., Peijian, T. & Ju, L. Bilateral synchronous total hip arthroplasty for ankylosed hips. Int. Orthop. 36(4), 697\u2013701. https:\/\/doi.org\/10.1007\/s00264-011-1313-8 (2012).","journal-title":"Int. Orthop."},{"issue":"10","key":"32672_CR26","doi-asserted-by":"publisher","first-page":"1346","DOI":"10.4103\/0366-6999.156780","volume":"128","author":"Y Zhang","year":"2015","unstructured":"Zhang, Y., Cheng, T. & Zhang, X. L. Changes in Intra-pelvic obliquity angle 0\u20132 years after total hip arthroplasty and its effects on leg length discrepancy: A retrospective study. Chin. Med. J. (Engl.) 128(10), 1346\u20131350. https:\/\/doi.org\/10.4103\/0366-6999.156780 (2015).","journal-title":"Chin. Med. J. (Engl.)"}],"container-title":["Scientific Reports"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.nature.com\/articles\/s41598-023-32672-8.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/www.nature.com\/articles\/s41598-023-32672-8","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/www.nature.com\/articles\/s41598-023-32672-8.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,4,6]],"date-time":"2023-04-06T00:42:34Z","timestamp":1680741754000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.nature.com\/articles\/s41598-023-32672-8"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,4,4]]},"references-count":26,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2023,12]]}},"alternative-id":["32672"],"URL":"https:\/\/doi.org\/10.1038\/s41598-023-32672-8","relation":{},"ISSN":["2045-2322"],"issn-type":[{"value":"2045-2322","type":"electronic"}],"subject":[],"published":{"date-parts":[[2023,4,4]]},"assertion":[{"value":"5 August 2022","order":1,"name":"received","label":"Received","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"31 March 2023","order":2,"name":"accepted","label":"Accepted","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"4 April 2023","order":3,"name":"first_online","label":"First Online","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"The authors declare no competing interests.","order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}],"article-number":"5541"}}