{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,18]],"date-time":"2026-08-18T02:07:19Z","timestamp":1787018839755,"version":"build-2736575974"},"reference-count":31,"publisher":"SAGE Publications","issue":"5","license":[{"start":{"date-parts":[[2023,3,16]],"date-time":"2023-03-16T00:00:00Z","timestamp":1678924800000},"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":[[2023,4]]},"abstract":"<jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>Recent biomechanical studies have reported that stress on the posterior cruciate ligament (PCL) graft increases as the posterior tibial slope (PTS) decreases (flattened) in knees with single-bundle (SB) and double-bundle PCL reconstruction. Clinical studies of SB PCL reconstruction have shown that a flattened PTS is associated with a lesser reduction in posterior tibial translation. There is no long-term study on the clinical outcomes and graft survival rates of SB PCL reconstruction based on the medial and lateral PTSs measured on magnetic resonance imaging.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Hypothesis:<\/jats:title>\n                    <jats:p>Flattened medial and lateral PTSs are associated with poor clinical outcomes and graft survival rates at a minimum 10-year follow-up after SB PCL reconstruction.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Study Design:<\/jats:title>\n                    <jats:p>Cohort study; Level of evidence, 3.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>In this cohort study, we retrospectively reviewed 46 patients (mean age, 28.8 \u00b1 9.9 years) who underwent primary SB PCL reconstruction between 2000 and 2009. They were followed up for a minimum of 10 years. The medial and lateral PTSs were measured on preoperative magnetic resonance imaging. As a previous study reported that a steeper medial or lateral PTS showed a higher risk of anterior tibial translation at thresholds of 5.6\u00b0 and 3.8\u00b0, respectively, the patients were divided into 2 groups based on the cutoff values of both the medial (\u22645.6\u00b0 vs &gt;5.6\u00b0) and lateral (\u22643.8\u00b0 vs &gt;3.8\u00b0) PTSs. Clinical scores (International Knee Documentation Committee subjective score, Lysholm score, and Tegner activity score), radiological outcomes (side-to-side difference [SSD] on stress radiography and osteoarthritis progression), and graft survival rates were compared between the groups at the last follow-up.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>\n                      All clinical scores and the progression of osteoarthritis demonstrated no significant difference between the 2 subgroups of both the medial and lateral PTS groups. The mean SSD on stress radiography after SB PCL reconstruction was significantly greater in patients with a medial PTS \u22645.6\u00b0 than in patients with a medial PTS &gt;5.6\u00b0 (8.4 \u00b1 3.9 vs 5.1 \u00b1 2.9 mm, respectively;\n                      <jats:italic>P<\/jats:italic>\n                      = .030), while the lateral PTS subgroups after SB PCL reconstruction demonstrated no significant difference. The minimum 10-year graft survival rate was significantly lower in patients with a medial PTS \u22645.6\u00b0 (68.4% vs 92.6%, respectively;\n                      <jats:italic>P<\/jats:italic>\n                      = .029) and a lateral PTS \u22643.8\u00b0 (50.0% vs 91.7%, respectively;\n                      <jats:italic>P<\/jats:italic>\n                      = .001).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>A flattened medial PTS (\u22645.6\u00b0) was associated with an increased SSD on stress radiography, and both flattened medial (\u22645.6\u00b0) and lateral (\u22643.8\u00b0) PTSs resulted in lower graft survival rates at a minimum 10-year follow-up after primary SB PCL reconstruction.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/03635465231156621","type":"journal-article","created":{"date-parts":[[2023,3,16]],"date-time":"2023-03-16T12:05:30Z","timestamp":1678968330000},"page":"1194-1201","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":26,"title":["Effect of Posterior Tibial Slopes on Graft Survival Rates at 10 Years After Primary Single-Bundle Posterior Cruciate Ligament Reconstruction"],"prefix":"10.1177","volume":"51","author":[{"given":"Kyoung Ho","family":"Yoon","sequence":"first","affiliation":[{"name":"Department of Orthopedic Surgery, Kyung Hee University Hospital, Seoul, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jong-Hwan","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery, Kyung Hee University Hospital, Seoul, Republic of 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