{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,31]],"date-time":"2026-10-31T02:27:35Z","timestamp":1793413655734,"version":"4.5.0"},"reference-count":34,"publisher":"SAGE Publications","issue":"1","license":[{"start":{"date-parts":[[2024,1,1]],"date-time":"2024-01-01T00:00:00Z","timestamp":1704067200000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2024,1,1]],"date-time":"2024-01-01T00:00:00Z","timestamp":1704067200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Am J Sports Med"],"published-print":{"date-parts":[[2024,1]]},"abstract":"<jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>Impaired quadriceps muscle strength after anterior cruciate ligament reconstruction (ACLR) is associated with worse clinical outcomes and a risk of reinjuries. Yet, we know little about quadriceps muscle strength in patients reconstructed with a quadriceps tendon (QT) graft, which is increasing in popularity worldwide.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Purpose:<\/jats:title>\n                    <jats:p>To describe and compare isokinetic quadriceps strength in patients undergoing ACLR with a QT, hamstring tendon (HT), or bone\u2013patellar tendon\u2013bone (BPTB) autograft.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Study Design:<\/jats:title>\n                    <jats:p>Cross-sectional study; Level of evidence, 3.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>We included patients with QT grafts (n = 104) and matched them to patients with HT (n = 104) and BPTB (n = 104) grafts based on age, sex, and associated meniscal surgery. Data were collected through clinical strength testing at a mean of 7 \u00b1 1 months postoperatively. Isokinetic strength was measured at 90 deg\/s, and quadriceps strength was expressed as the limb symmetry index (LSI) for peak torque, total work, torque at 30\u00b0 of knee flexion, and time to peak torque.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>\n                      Patients with QT grafts had the most impaired isokinetic quadriceps strength, with the LSI ranging between 67.5% and 75.1%, followed by those with BPTB grafts (74.4%-81.5%) and HT grafts (84.0%-89.0%). Patients with QT grafts had a significantly lower LSI for all variables compared with patients with HT grafts (mean difference: peak torque: \u221217.4% [95% CI, \u221221.7 to \u221213.2],\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      &lt; .001; total work: \u221215.9% [95% CI, \u221220.6 to \u221211.1],\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      &lt; .001; torque at 30\u00b0 of knee flexion: \u22128.8% [95% CI, \u221214.7 to \u22122.9],\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      = .001; time to peak torque: \u221217.7% [95% CI, \u221225.8 to \u22129.6],\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      &lt; .001). Compared with patients with BPTB grafts, patients with QT grafts had a significantly lower LSI for all variables (mean difference: peak torque: \u22126.9% [95% CI, \u221211.2 to \u22122.7],\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      &lt; .001; total work: \u22127.7% [95% CI, \u221212.4 to \u22122.9],\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      &lt; .001; torque at 30\u00b0 of knee flexion: \u22126.3% [95% CI, \u221212.2 to \u22120.5],\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      = .03; time to peak torque: \u22128.8% [95% CI, \u221216.9 to \u22120.7],\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      = .03). None of the graft groups reached a mean LSI of &gt;90% for peak torque (QT: 67.5% [95% CI, 64.8-70.1]; HT: 84.9% [95% CI, 82.4-87.4]; BPTB: 74.4% [95% CI, 72.0-76.9]).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>At 7 months after ACLR, patients with QT grafts had significantly worse isokinetic quadriceps strength than patients with HT and BPTB grafts. None of the 3 graft groups reached a mean LSI of &gt;90% in quadriceps strength.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/03635465231209442","type":"journal-article","created":{"date-parts":[[2024,1,2]],"date-time":"2024-01-02T04:03:43Z","timestamp":1704168223000},"page":"69-76","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":53,"title":["Weaker Quadriceps Muscle Strength With a Quadriceps Tendon Graft Compared With a Patellar or Hamstring Tendon Graft at 7 Months After Anterior Cruciate Ligament Reconstruction"],"prefix":"10.1177","volume":"52","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3626-9680","authenticated-orcid":false,"given":"David","family":"Holmgren","sequence":"first","affiliation":[{"name":"Department of Molecular Medicine and Surgery, Stockholm Sports Trauma Research Center, Karolinska Institutet, Stockholm, Sweden"},{"name":"Capio Artro Clinic, FIFA Medical Centre of 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