{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,5]],"date-time":"2026-01-05T22:30:24Z","timestamp":1767652224340,"version":"build-2065373602"},"reference-count":17,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2021,10,6]],"date-time":"2021-10-06T00:00:00Z","timestamp":1633478400000},"content-version":"vor","delay-in-days":278,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2021,1,1]],"date-time":"2021-01-01T00:00:00Z","timestamp":1609459200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2021,10,6]],"date-time":"2021-10-06T00:00:00Z","timestamp":1633478400000},"content-version":"vor","delay-in-days":278,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["J. exp. orthop."],"published-print":{"date-parts":[[2021,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Purpose<\/jats:title><jats:p>The anterior cruciate ligament (ACL) reconstruction via a contralateral bone\u2010tendon\u2010bone (C\u2010BTB) autograft was introduced to encourage early return to sports. The purpose of this study is to evaluate whether primary contralateral BTB ACL reconstruction can be adapted for early return\u2010to\u2010sports modification by investigating the chronological changes of muscle strength after surgery.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Fifteen patients who had underwent C\u2010BTB ACL reconstruction were compared with a matched group of 15 patients of ipsilateral BTB (I\u2010BTB) ACL reconstruction. The clinical outcomes of the time of return\u2010to\u2010sports, Tegner activity scale and the rate of second ACL injuries, the tibial anterior translation measurement, and knee extension and flexion muscle strength were assessed.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Within 12\u2009months after surgery, 14 of 15 patients from both groups returned to preinjury sports. The median time to return to sports after surgery was 6.5\u2009months in the C\u2010BTB group and 8.0\u2009months in the I\u2010BTB group (<jats:italic>p<\/jats:italic>\u2009=\u20090.021). No significant difference was noted with regard to the Tegner activity scale, reinjury rate or mean instrumental anterior tibial translation. The quadriceps muscle strength in the ACL\u2010reconstructed knee compared with the opposite knee in both groups at 5\u2009months after surgery was 120.6% in the C\u2010BTB group and 70.0% in the I\u2010BTB group (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001). However, the quadriceps muscle strength of the non\u2010reconstructed limb, which instructed the graft harvested knee in the C\u2010BTB and the intact knee in the I\u2010BTB group, compared with that of the preoperative uninjured limb, was 74.5% in the C\u2010BTB group and 118.7% in the I\u2010BTB group (<jats:italic>p<\/jats:italic>\u2009=\u20090.0021) 5\u2009months after surgery. Moreover, the quadriceps muscle strength of the reconstructed knee compared with the preoperative normal limb was 88.8% and 81.5% in the C\u2010BTB and I\u2010BTB groups, respectively (<jats:italic>p<\/jats:italic>\u2009=\u20090.38).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>ACL reconstruction via the C\u2010BTB autograft indicated better quadriceps muscle strength from early stage after surgery compared with I\u2010BTB ACL reconstruction. However, the ostensible rapid symmetrical muscle strength recovery was attributed to strength deficits compared to the preoperative condition at the donor site limb and ACL\u2010reconstructed limb.<\/jats:p><\/jats:sec><jats:sec><jats:title>Level of evidence<\/jats:title><jats:p>Level: Level: 4.<\/jats:p><\/jats:sec>","DOI":"10.1186\/s40634-021-00399-y","type":"journal-article","created":{"date-parts":[[2021,10,7]],"date-time":"2021-10-07T01:38:02Z","timestamp":1633570682000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Muscle strength after the anterior cruciate ligament reconstruction via contralateral bone\u2010tendon\u2010bone autograft"],"prefix":"10.1002","volume":"8","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5423-0387","authenticated-orcid":false,"given":"Takaki","family":"Sanada","sequence":"first","affiliation":[{"name":"Department of Sports Orthopaedic Surgery Kanto Rosai Hospital Kanto Rosai Hospital, 1\u20101\u00a0Kizuki Sumiyoshicho, Nakahara\u2010Ku 211\u20108510 Kawasaki Kanagawa Prefecture Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Eiji","family":"Uchiyama","sequence":"additional","affiliation":[{"name":"Inanami Spine and Joint Hospital Tokyo Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hiroshi","family":"Iwaso","sequence":"additional","affiliation":[{"name":"Department of Sports Orthopaedic Surgery Kanto Rosai Hospital Kanto Rosai Hospital, 1\u20101\u00a0Kizuki Sumiyoshicho, Nakahara\u2010Ku 211\u20108510 Kawasaki Kanagawa Prefecture Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Atsushi","family":"Fukai","sequence":"additional","affiliation":[{"name":"Faculty of Medical Technology Teikyo University Tokyo Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2021,10,6]]},"reference":[{"key":"e_1_2_10_2_2","doi-asserted-by":"publisher","DOI":"10.1136\/bjsm.2010.076364"},{"key":"e_1_2_10_3_2","doi-asserted-by":"publisher","DOI":"10.2519\/jospt.2020.9071"},{"key":"e_1_2_10_4_2","doi-asserted-by":"publisher","DOI":"10.1177\/0363546510388163"},{"key":"e_1_2_10_5_2","doi-asserted-by":"publisher","DOI":"10.1136\/bjsports\u20102018\u2010099982"},{"key":"e_1_2_10_6_2","doi-asserted-by":"publisher","DOI":"10.1177\/0363546511422349"},{"key":"e_1_2_10_7_2","unstructured":"FukudaH OguraT AsaiS OmodaniT et al (2021) Bone\u2011patellar tendon\u2013bone autograft maturation is superior to double\u2011bundle hamstring tendon autograft maturation following anatomical anterior cruciate ligament reconstruction. Knee Surg Sports Traumatol Arthrosc23.https:\/\/doi.org\/10.1007\/s00167\u2010021\u201006653\u20101."},{"key":"e_1_2_10_8_2","doi-asserted-by":"publisher","DOI":"10.5435\/JAAOS\u2010D\u201013\u201000183"},{"key":"e_1_2_10_9_2","doi-asserted-by":"publisher","DOI":"10.5792\/ksrr.18.048"},{"key":"e_1_2_10_10_2","doi-asserted-by":"publisher","DOI":"10.1136\/bjsports\u20102016\u2010096836"},{"key":"e_1_2_10_11_2","doi-asserted-by":"publisher","DOI":"10.1177\/0363546504265926"},{"key":"e_1_2_10_12_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00264\u2010016\u20103246\u20108"},{"key":"e_1_2_10_13_2","doi-asserted-by":"publisher","DOI":"10.2519\/jospt.2012.4194"},{"key":"e_1_2_10_14_2","doi-asserted-by":"publisher","DOI":"10.1177\/0363546514560877"},{"key":"e_1_2_10_15_2","doi-asserted-by":"publisher","DOI":"10.1177\/036354659001800313"},{"key":"e_1_2_10_16_2","doi-asserted-by":"publisher","DOI":"10.1177\/036354659702500108"},{"key":"e_1_2_10_17_2","doi-asserted-by":"publisher","DOI":"10.1177\/03635465000280050501"},{"key":"e_1_2_10_18_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.csm.2007.06.008"}],"container-title":["Journal of Experimental Orthopaedics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1186\/s40634-021-00399-y.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/article\/10.1186\/s40634-021-00399-y\/fulltext.html","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1186\/s40634-021-00399-y.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"similarity-checking"},{"URL":"https:\/\/esskajournals.onlinelibrary.wiley.com\/doi\/pdf\/10.1186\/s40634-021-00399-y","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,16]],"date-time":"2025-10-16T18:02:35Z","timestamp":1760637755000},"score":1,"resource":{"primary":{"URL":"https:\/\/esskajournals.onlinelibrary.wiley.com\/doi\/10.1186\/s40634-021-00399-y"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,1]]},"references-count":17,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2021,1]]}},"alternative-id":["10.1186\/s40634-021-00399-y"],"URL":"https:\/\/doi.org\/10.1186\/s40634-021-00399-y","archive":["Portico"],"relation":{},"ISSN":["2197-1153","2197-1153"],"issn-type":[{"type":"print","value":"2197-1153"},{"type":"electronic","value":"2197-1153"}],"subject":[],"published":{"date-parts":[[2021,1]]},"assertion":[{"value":"15 June 2021","order":1,"name":"received","label":"Received","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"27 August 2021","order":2,"name":"accepted","label":"Accepted","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"6 October 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":"Institutional review board approval was received for this study.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval and consent to participate"}},{"value":"Informed consent of treatment and participation in the investigation were obtains from every patients.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}},{"value":"The all authors declare that they have no conflict of interest. This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}],"article-number":"86"}}