{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,11,12]],"date-time":"2026-11-12T12:11:35Z","timestamp":1794485495341,"version":"4.9.1"},"reference-count":39,"publisher":"SAGE Publications","issue":"9","license":[{"start":{"date-parts":[[2024,7,1]],"date-time":"2024-07-01T00:00:00Z","timestamp":1719792000000},"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":[[2024,7]]},"abstract":"<jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>It remains unclear which subset of patients with recurrent patellofemoral instability would benefit from a concomitant bony realignment procedure in addition to a medial patellofemoral ligament (MPFL) reconstruction.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Purpose:<\/jats:title>\n                    <jats:p>To provide midterm results for patients who underwent an isolated MPFL reconstruction as part of an ongoing prospective trial.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Study Design:<\/jats:title>\n                    <jats:p>Case series; Level of evidence, 4.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>Patients with recurrent patellar instability were prospectively enrolled in an institutional registry beginning in March 2014. Exclusion criteria included history of a previous surgery for patellar instability, an off-loadable (inferior\/lateral) chondral defect, anterior knee pain \u226550% of their chief complaint, and a \u201cjumping J\u201d sign. All patients underwent primary, unilateral, isolated MPFL reconstruction regardless of their bony anatomic characteristics. Patient-reported outcome measures (PROMs), episodes of recurrent instability, and ability to return to sport were obtained annually. Radiographic measurements of baseline radiographs and MRI were obtained at baseline.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>A total of 138 patients underwent isolated MPFL reconstruction between March 2014 and December 2019. The mean radiographic measurements were tibial tubercle\u2013trochlear groove, 15.1 \u00b1 4.9 mm; Caton-Deschamps index, 1.14 \u00b1 0.16; patellar trochlear index, 46.9% \u00b1 15.1%; trochlear depth index, 2.5 \u00b1 1.2 mm; tibial tubercle to lateral trochlear ridge, \u22128.4 \u00b1 5.7 mm; and patellar tendon to lateral trochlear ridge, 5.7 \u00b1 6.2 mm. Trochlear dysplasia, defined as a trochlear depth index &lt;3 mm, was present in 79\/125 (63%) patients. A total of 50 patients reached \u22655 years, of whom 40 (80%) completed follow-up PROMs. A total of 119 patients reached \u22652 years, of whom 89 (75%) completed follow-up PROMs. Six patients (5%) reported recurrent instability with a mean time of 2.97 years after surgery. All PROMs improved over time except for the Pediatric Functional Activity Brief Scale (Pedi-FABS), which had no change. At 2 years, the mean changes from baseline for Knee injury and Osteoarthritis Outcome Score (KOOS) Quality of Life subscale (QOL), Pedi-FABS, International Knee Documentation Committee (IKDC) score, KOOS Physical Function Short Form (PS), and Kujala score were 42.1, 0.6, 35.1, \u201323.5, and 32.3, respectively. All changes had P values &lt;.001 except for Pedi-FABS, which showed no change and had P &gt; .999. At 5 years, the mean changes from baseline for KOOS-QOL, Pedi-FABS, IKDC, KOOS-PS, and Kujala score were 42.6, \u20132.8, 32.6, \u201321.5, and 31.6, respectively. All changes had P values &lt;.001 except for Pedi-FABS, which showed no change and had P &gt; .453. In total, 89% of patients returned to sport with a mean of 9.1 months.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>Midterm outcomes for patients who underwent isolated MPFL reconstruction were favorable and were maintained at 5 years. Outcomes for the expanded cohort of patients with a minimum 2-year follow-up support previously published results.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/03635465241260039","type":"journal-article","created":{"date-parts":[[2024,8,5]],"date-time":"2024-08-05T08:50:05Z","timestamp":1722847805000},"page":"2196-2204","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":34,"title":["Isolated Medial Patellofemoral Ligament Reconstruction for Recurrent Patellar Instability Regardless of Tibial Tubercle\u2013Trochlear Groove Distance and Patellar Height: Minimum 5-Year Outcomes"],"prefix":"10.1177","volume":"52","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7214-3460","authenticated-orcid":false,"given":"Elizabeth R.","family":"Dennis","sequence":"first","affiliation":[{"name":"Department of Orthopedics, Icahn School of Medicine at Mount Sinai Hospital, New York, New York, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8434-2088","authenticated-orcid":false,"given":"William A.","family":"Marmor","sequence":"additional","affiliation":[{"name":"Department of Orthopedics, Miller School of Medicine at University of Miami, Miami, Florida, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bennett E.","family":"Propp","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery, Hospital for Special Surgery, New York, New York, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Brandon J.","family":"Erickson","sequence":"additional","affiliation":[{"name":"Rothman Orthopedic Institute, New York, New York, USA"},{"name":"Department of Orthopaedic Surgery, New York University, New York, New York, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Simone","family":"Gruber","sequence":"additional","affiliation":[{"name":"Department of 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