{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,26]],"date-time":"2026-09-26T17:31:23Z","timestamp":1790443883846,"version":"4.1.0"},"reference-count":26,"publisher":"SAGE Publications","license":[{"start":{"date-parts":[[2021,1,1]],"date-time":"2021-01-01T00:00:00Z","timestamp":1609459200000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Geriatr Orthop Surg Rehabil"],"published-print":{"date-parts":[[2021,1,1]]},"abstract":"<jats:sec>\n                    <jats:title>Introduction:<\/jats:title>\n                    <jats:p>The failure rate of operations involving the cephalomedullary nail technique for unstable femoral trochanteric fractures is 3-12%. Changing the reduction strategy may improve the stability. This study aimed to confirm whether reducing the proximal fragment with the medial calcar contact, as opposed to utilizing an intramedullary reduction, would improve the stability of such fractures.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Materials and Methods:<\/jats:title>\n                    <jats:p>The unstable femoral trochanteric fracture model was created with fixation by cephalomedullary nails in 22 imitation bones. The 2 reduction patterns were as follows: one was with the proximal head-neck fragment external to the distal bone in the frontal plane and anterior in the sagittal plane as \u201cExtramedullary,\u201d while the other was the opposite reduction position, that is, bone in the frontal plane and sagittal plane as \u201cIntramedullary.\u201d We evaluated the tip-apex distance, compression stiffness, change in femoral neck-shaft angle, amount of blade telescoping, and diameter of the distal screw hole after the compression test. Statistical analysis was conducted using the Mann-Whitney U test.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>No significant differences were seen in compression stiffness ( p = 0.804) and femoral neck-shaft angle change ( p = 0.644). Although the \u201cExtramedullary\u201d tip-apex distance was larger than the \u201cIntramedullary\u201d distance ( p = 0.001), it indicated clinically acceptable lengths. The amount of blade telescoping and the distal screw hole diameter were significantly larger in \u201cIntramedullary\u201d than in \u201cExtramedullary\u201d ( p &lt; 0.001, p = 0.019, respectively). Our results showed that \u201cIntramedullary\u201d had significantly larger blade telescoping and distal screw hole diameters than \u201cExtramedullary,\u201d and contrary to our hypothesis, no significant differences were seen in compression stiffness and femoral neck-shaft angle change.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions:<\/jats:title>\n                    <jats:p>As opposed to the \u201cIntramedullary\u201d reduction pattern, the biomechanical properties of the \u201cExtramedullary\u201d reduction pattern improved stability during testing and decreased sliding.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/2151459321998611","type":"journal-article","created":{"date-parts":[[2021,2,25]],"date-time":"2021-02-25T22:48:28Z","timestamp":1614293308000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":16,"title":["Biomechanical Evaluation of Extramedullary Versus Intramedullary Reduction in Unstable Femoral Trochanteric Fractures"],"prefix":"10.1177","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2163-1461","authenticated-orcid":false,"given":"Tadashi","family":"Kawamura","sequence":"first","affiliation":[{"name":"Department of Orthopaedic Surgery, Kitasato University School of Medicine, Minami-ku, Sagamihara, Kanagawa, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hiroaki","family":"Minehara","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Kitasato University School of Medicine, Minami-ku, Sagamihara, Kanagawa, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ryo","family":"Tazawa","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Kitasato University School of Medicine, Minami-ku, Sagamihara, Kanagawa, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Terumasa","family":"Matsuura","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Kitasato University School of Medicine, Minami-ku, Sagamihara, Kanagawa, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rina","family":"Sakai","sequence":"additional","affiliation":[{"name":"Department of Medical Engineering and Technology, Kitasato University, Minami-ku, Sagamihara, Kanagawa, Japan."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Masashi","family":"Takaso","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Kitasato University School of Medicine, Minami-ku, Sagamihara, Kanagawa, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2021,2,25]]},"reference":[{"key":"bibr1-2151459321998611","doi-asserted-by":"publisher","DOI":"10.1186\/s12891-018-2276-3"},{"key":"bibr2-2151459321998611","doi-asserted-by":"publisher","DOI":"10.1016\/S0020-1383(11)70008-0"},{"key":"bibr3-2151459321998611","doi-asserted-by":"publisher","DOI":"10.1097\/00005131-200501000-00014"},{"key":"bibr4-2151459321998611","doi-asserted-by":"publisher","DOI":"10.1007\/s00590-016-1757-z"},{"key":"bibr5-2151459321998611","doi-asserted-by":"publisher","DOI":"10.1016\/j.jcot.2019.04.018"},{"key":"bibr6-2151459321998611","doi-asserted-by":"publisher","DOI":"10.1016\/S0020-1383(02)00008-6"},{"key":"bibr7-2151459321998611","doi-asserted-by":"publisher","DOI":"10.1097\/BOT.0b013e31821e3f8c"},{"key":"bibr8-2151459321998611","doi-asserted-by":"publisher","DOI":"10.1615\/JLongTermEffMedImplants.2017019151"},{"key":"bibr9-2151459321998611","doi-asserted-by":"publisher","DOI":"10.1016\/S0020-1383(03)00287-0"},{"key":"bibr10-2151459321998611","doi-asserted-by":"publisher","DOI":"10.1186\/1471-2474-14-1"},{"key":"bibr11-2151459321998611","doi-asserted-by":"publisher","DOI":"10.1007\/s00402-015-2206-x"},{"key":"bibr12-2151459321998611","doi-asserted-by":"publisher","DOI":"10.1007\/s00402-014-2089-2"},{"key":"bibr13-2151459321998611","doi-asserted-by":"publisher","DOI":"10.1007\/s00402-012-1484-9"},{"key":"bibr14-2151459321998611","doi-asserted-by":"publisher","DOI":"10.2106\/00004623-199507000-00012"},{"key":"bibr15-2151459321998611","doi-asserted-by":"publisher","DOI":"10.1016\/0021-9290(72)90056-5"},{"key":"bibr16-2151459321998611","doi-asserted-by":"publisher","DOI":"10.2106\/JBJS.F.01561"},{"key":"bibr17-2151459321998611","first-page":"30073","volume":"0949","author":"Tazawa 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