{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,29]],"date-time":"2026-05-29T23:35:49Z","timestamp":1780097749352,"version":"3.54.0"},"reference-count":27,"publisher":"Wiley","issue":"8","license":[{"start":{"date-parts":[[2021,5,5]],"date-time":"2021-05-05T00:00:00Z","timestamp":1620172800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2021,5,5]],"date-time":"2021-05-05T00:00:00Z","timestamp":1620172800000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"},{"start":{"date-parts":[[2021,5,5]],"date-time":"2021-05-05T00:00:00Z","timestamp":1620172800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2021,5,5]],"date-time":"2021-05-05T00:00:00Z","timestamp":1620172800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"funder":[{"DOI":"10.13039\/501100002839","name":"Charit\u00e9 - Universit\u00e4tsmedizin Berlin","doi-asserted-by":"crossref","id":[{"id":"10.13039\/501100002839","id-type":"DOI","asserted-by":"crossref"}]},{"DOI":"10.13039\/501100002839","name":"Charit\u00e9 \u2013 Universit\u00e4tsmedizin Berlin","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100002839","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Knee surg. sports traumatol. arthrosc."],"published-print":{"date-parts":[[2021,8]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>The ischiofemoral distance (IFD), defined as the distance between the ischial tuberosity and the lesser trochanter of the femur, is gaining recognition as an extra\u2010articular cause of hip pain. It is unknown whether the IFD is influenced by the frontal knee alignment. The aim of this study was to determine the influence of realignment surgery around the knee on the IFD. It was hypothesized that valgisation osteotomy around the knee is associated with reduction of the IFD.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>A consecutive series of 154 patients undergoing frontal realignment procedures around the knee in 2017 were included in this study. Long\u2010leg standing radiographs were obtained before surgery and postoperatively. The IFD was measured between the ischium and the lesser trochanter at three different levels (proximal, middle and distal margins of the lesser trochanter parallel to the horizontal orientation of the pelvis) on standardized long\u2010leg radiographs with the patient in upright standing position. The knee alignment was determined by measuring the hip knee ankle angle, mechanical lateral distal femur angle and the medial mechanical proximal tibia angle. Linear regression was performed to determine the influence of the change of frontal knee alignment on the IFD.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Linear regression showed a direct influence of the overall change in frontal knee alignment on the IFD of the hip, regardless of the site of the osteotomy (\u03b2\u20100.4, confidence\u2010interval \u2212 0.5 to \u2212 0.3,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.001). Valgisation osteotomy around the knee induced a significant reduction of the ipsilateral IFD (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.001), while varisation osteotomy induced a significant increase (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.001). The amount of ISD change was 0.4\u00a0mm per corresponding degree of change in frontal knee alignment.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>These findings are relevant to both the hip and knee surgeons when planning an osteotomy or arthroplasty procedure. Correction of a malalignment of the knee may resolve an ischiofemoral conflict in the hip. The concept deserves inclusion in the diagnostic workup of both the hip and knee joints.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Level of evidence<\/jats:title>\n                    <jats:p>IV.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1007\/s00167-021-06589-6","type":"journal-article","created":{"date-parts":[[2021,5,5]],"date-time":"2021-05-05T04:03:05Z","timestamp":1620187385000},"page":"2446-2452","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["The ischiofemoral space of the hip is influenced by the frontal knee alignment"],"prefix":"10.1002","volume":"29","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9763-092X","authenticated-orcid":false,"given":"Sufian S.","family":"Ahmad","sequence":"first","affiliation":[{"name":"<!--<label>1<\/label>--> BG Center for Trauma and Reconstructive Surgery Eberhard\u2010Karls University of T\u00fcbingen T\u00fcbingen Germany"},{"name":"<!--<label>2<\/label>--> Center for Musculoskeletal Surgery Charit\u00e9 \u2010 Universit\u00e4tsmedizin Berlin Berlin Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vincent","family":"Kerber","sequence":"additional","affiliation":[{"name":"<!--<label>1<\/label>--> BG Center for Trauma and Reconstructive Surgery Eberhard\u2010Karls University of T\u00fcbingen T\u00fcbingen Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christian","family":"Konrads","sequence":"additional","affiliation":[{"name":"<!--<label>1<\/label>--> BG Center for Trauma and Reconstructive Surgery Eberhard\u2010Karls University of T\u00fcbingen T\u00fcbingen Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Atesch","family":"Ateschrang","sequence":"additional","affiliation":[{"name":"<!--<label>3<\/label>--> Evangelisches Stift St. Martin Gemeinschaftsklinikum Mittelrhein Koblenz Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael T.","family":"Hirschmann","sequence":"additional","affiliation":[{"name":"<!--<label>4<\/label>--> Department of Orthopaedic Surgery and Traumatology Kantonsspital Baselland (Bruderholz, Liestal, Laufen) 4101 Bruderholz Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ulrich","family":"St\u00f6ckle","sequence":"additional","affiliation":[{"name":"<!--<label>2<\/label>--> Center for Musculoskeletal Surgery Charit\u00e9 \u2010 Universit\u00e4tsmedizin Berlin Berlin Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marc D.","family":"Ahrend","sequence":"additional","affiliation":[{"name":"<!--<label>1<\/label>--> BG Center for Trauma and Reconstructive Surgery Eberhard\u2010Karls University of T\u00fcbingen T\u00fcbingen Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2021,5,5]]},"reference":[{"key":"e_1_2_8_2_2","doi-asserted-by":"crossref","unstructured":"AkamatsuY NejimaS TsujiM KobayashiH MuramatsuSJoint line obliquity was maintained after double\u2010level osteotomy but was increased after open\u2010wedge high tibial osteotomy.Knee Surg Sports Traumatol Arthrosc(2021)10.1007\/s00167\u2010020\u201006430\u20106","DOI":"10.1007\/s00167-020-06430-6"},{"key":"e_1_2_8_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.arthro.2014.02.042"},{"key":"e_1_2_8_4_2","first-page":"249","article-title":"Pelvic morphology in ischiofemoral impingement","volume":"44","author":"Bredella 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November 2020","order":1,"name":"received","label":"Received","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"21 April 2021","order":2,"name":"accepted","label":"Accepted","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"5 May 2021","order":3,"name":"first_online","label":"First Online","group":{"name":"ArticleHistory","label":"Article History"}},{"order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"The authors declare no conflict of interest.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interest"}},{"value":"The study was approved by the ethics committee of the University of T\u00fcbingen (Study ID: 421\/2020BO).","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethical approval"}}]}}