{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,11,3]],"date-time":"2026-11-03T20:44:49Z","timestamp":1793738689725,"version":"4.6.1"},"reference-count":25,"publisher":"SAGE Publications","issue":"5","license":[{"start":{"date-parts":[[2024,3,8]],"date-time":"2024-03-08T00:00:00Z","timestamp":1709856000000},"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":[[2024,4]]},"abstract":"<jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>Little is known about the effect of modern hip arthroscopy on the natural history of femoroacetabular impingement syndrome (FAIS) with respect to joint preservation.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Purpose:<\/jats:title>\n                    <jats:p>To (1) characterize the natural history of FAIS and (2) understand the effect of modern hip arthroscopy by radiographically comparing the hips of patients who underwent only unilateral primary hip arthroscopy with a minimum follow-up of 10 years.<\/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>Between 2010 and 2012, 619 consecutive patients were reviewed from the practice of a single fellowship-trained hip arthroscopic surgeon. Inclusion criteria were FAIS, bilateral radiographic findings of femoroacetabular impingement, primary unilateral hip arthroscopy (labral repair, femoroplasty, or capsular closure), and minimum 10-year follow-up. The preoperative and minimum 10-year postoperative radiographs of patients were evaluated at each time point. Both operative and nonoperative hips were graded using the T\u00f6nnis classification or the presence of hip arthroplasty by 2 independent reviewers. Subgroup analyses were performed.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>A total of 200 hips from 100 patients were evaluated at a mean follow-up of 12.0 years. Preoperatively, 98% and 99% of operative and nonoperative hips were evaluated as T\u00f6nnis grades 0 and 1, respectively; 5% of nonoperative hips had worse T\u00f6nnis grades than operative hips. The nonoperative hip advanced to a worse T\u00f6nnis grade in 48% (48\/100) of cases compared with 28% (28\/100) among operative hips. At follow-up, T\u00f6nnis grades between hips were equal in 70% (70\/100) of the cases, the operative hip had a better grade 25% (25\/100) of the time, and the nonoperative hip had a better grade 5% (5\/100) of the time. Modern hip arthroscopy was associated with a relative risk reduction of 42% in osteoarthritis progression. Impingement with borderline dysplasia, age, preoperative T\u00f6nnis grade, and alpha angle &gt;65\u00b0 were key risk factors in the radiographic progression of osteoarthritis.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>Although the majority of patients (70%) undergoing hip arthroscopy for FAIS did not experience differences between operative and nonoperative hips in terms of the radiographic progression of osteoarthritis, the natural history may be favorably altered for 25% of patients whose T\u00f6nnis grade was better after undergoing arthroscopic correction. Modern hip arthroscopy indications and techniques represent a valid joint-preservation procedure conferring a relative risk reduction of 42% in the progression of osteoarthritis. Arthroscopy for mixed patterns of impingement and instability were the fastest to degenerate.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/03635465241232154","type":"journal-article","created":{"date-parts":[[2024,3,9]],"date-time":"2024-03-09T01:16:25Z","timestamp":1709946985000},"page":"1137-1143","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":41,"title":["Modern Hip Arthroscopy for FAIS May Delay the Natural History of Osteoarthritis in 25% of Patients: A 12-Year Follow-up Analysis"],"prefix":"10.1177","volume":"52","author":[{"given":"Prem N.","family":"Ramkumar","sequence":"first","affiliation":[{"name":"Center for Hip Preservation, Hospital for Special Surgery, New York, New York, USA"},{"name":"Long Beach Orthopaedic Institute, Long Beach, California, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0012-1481","authenticated-orcid":false,"given":"Reena J.","family":"Olsen","sequence":"additional","affiliation":[{"name":"Center for Hip Preservation, Hospital for Special Surgery, New York, New York, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hashim J.F.","family":"Shaikh","sequence":"additional","affiliation":[{"name":"University of Rochester Medical Center, Rochester, New York, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Danyal H.","family":"Nawabi","sequence":"additional","affiliation":[{"name":"Center for Hip Preservation, Hospital for Special Surgery, New York, New York, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bryan T.","family":"Kelly","sequence":"additional","affiliation":[{"name":"Center for Hip Preservation, Hospital for Special Surgery, New York, New York, 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