{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,3]],"date-time":"2026-08-03T23:38:37Z","timestamp":1785800317898,"version":"3.56.0"},"reference-count":21,"publisher":"SAGE Publications","issue":"3","license":[{"start":{"date-parts":[[2015,12,28]],"date-time":"2015-12-28T00:00:00Z","timestamp":1451260800000},"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":[[2016,3]]},"abstract":"<jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>There is a paucity of data on the results of reverse (anteverting) periacetabular osteotomy (RPAO) for treatment of femoroacetabular impingement (FAI) secondary to acetabular retroversion.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Purpose:<\/jats:title>\n                    <jats:p>To evaluate the midterm outcomes of RPAO for FAI secondary to acetabular retroversion in those with and without hip dysplasia.<\/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>A retrospective review identified RPAOs performed on patients with acetabular retroversion in isolation or in the setting of dysplasia (lateral center-edge angle [LCEA] \u226419\u00b0). Acetabular retroversion with FAI was diagnosed clinically and radiographically, with a positive crossover and posterior wall signs on pelvic radiographs. Twenty-three patients (30 hips) met the inclusion criteria; 20 hips with isolated retroversion and 10 hips with retroversion and hip dysplasia. The average age at the time of the procedure was 26 years (range, 13-45 years). The average length of follow-up was 5 years (range, 2-19 years). Harris Hip Score (HHS) and radiographs were evaluated preoperatively and at last follow-up.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>The mean preoperative LCEA was 31\u00b0 (range, 22\u00b0-49\u00b0) in the isolated retroversion group and 9\u00b0 (range, \u20134\u00b0 to 17\u00b0) in the dysplastic group. Postoperatively, the LCEA in the dysplastic group increased to 35\u00b0 (range, 15\u00b0-46\u00b0) ( P = .0001). The crossover sign corrected in 55% (11\/20) of the isolated retroversion group and 80% (8\/10) of the dysplastic group. The acetabular index (mean \u00b1 SD) improved from 1.3 \u00b1 0.3 to 1.7 \u00b1 0.6 ( P = .0001), indicating improved anteversion. At the latest follow-up, the average HHS in the isolated retroversion group increased from 58 preoperatively (range, 23-77) to 93 (range, 68-100) ( P = .0001); the HHS in the dysplastic group improved from 49 (range, 20-74) to 92 (range, 77-100) ( P &lt; .0001). Complication rates were similar in both groups. Excluding hardware removal, additional surgeries were performed in 13% (4\/30).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>RPAO performed for FAI in the young patient with isolated acetabular retroversion or retroversion in the setting of dysplasia successfully improved clinical and radiographic results at mid- to long-term follow-up.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/0363546515620382","type":"journal-article","created":{"date-parts":[[2015,12,28]],"date-time":"2015-12-28T22:23:59Z","timestamp":1451341439000},"page":"672-676","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":49,"title":["Midterm Outcomes of Reverse (Anteverting) Periacetabular Osteotomy in Patients With Hip Impingement Secondary to Acetabular Retroversion"],"prefix":"10.1177","volume":"44","author":[{"given":"Joshua A.","family":"Parry","sequence":"first","affiliation":[{"name":"Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Russell P.","family":"Swann","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jill A.","family":"Erickson","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery, University of Utah, Salt Lake City, Utah, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christopher L.","family":"Peters","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery, University of Utah, Salt Lake City, Utah, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Robert T.","family":"Trousdale","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rafael J.","family":"Sierra","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2015,12,28]]},"reference":[{"key":"bibr1-0363546515620382","doi-asserted-by":"publisher","DOI":"10.1302\/0301-620X.91B2.21137"},{"key":"bibr2-0363546515620382","doi-asserted-by":"publisher","DOI":"10.2106\/JBJS.H.00756"},{"key":"bibr3-0363546515620382","doi-asserted-by":"publisher","DOI":"10.1007\/s11999-009-1138-6"},{"key":"bibr4-0363546515620382","doi-asserted-by":"publisher","DOI":"10.2106\/JBJS.D.02385"},{"key":"bibr5-0363546515620382","doi-asserted-by":"publisher","DOI":"10.2106\/JBJS.I.00046"},{"key":"bibr6-0363546515620382","doi-asserted-by":"publisher","DOI":"10.1097\/00003086-198807000-00006"},{"key":"bibr7-0363546515620382","doi-asserted-by":"publisher","DOI":"10.1007\/s11999-007-0060-z"},{"key":"bibr8-0363546515620382","doi-asserted-by":"publisher","DOI":"10.1097\/01.blo.0000096804.78689.c2"},{"key":"bibr9-0363546515620382","doi-asserted-by":"publisher","DOI":"10.1097\/01.blo.0000093014.90435.64"},{"key":"bibr10-0363546515620382","doi-asserted-by":"publisher","DOI":"10.3810\/psm.2014.09.2082"},{"key":"bibr11-0363546515620382","doi-asserted-by":"publisher","DOI":"10.1002\/jor.20380"},{"key":"bibr12-0363546515620382","doi-asserted-by":"publisher","DOI":"10.1007\/s00264-010-1035-3"},{"key":"bibr13-0363546515620382","doi-asserted-by":"publisher","DOI":"10.1007\/s11999-012-2760-2"},{"key":"bibr14-0363546515620382","doi-asserted-by":"publisher","DOI":"10.1097\/00003086-200401000-00009"},{"key":"bibr15-0363546515620382","doi-asserted-by":"publisher","DOI":"10.1007\/s002560100402"},{"key":"bibr16-0363546515620382","doi-asserted-by":"publisher","DOI":"10.3928\/01477447-20101123-07"},{"key":"bibr17-0363546515620382","doi-asserted-by":"publisher","DOI":"10.1007\/s11420-010-9192-x"},{"key":"bibr18-0363546515620382","doi-asserted-by":"publisher","DOI":"10.1302\/0301-620X.81B2.0810281"},{"key":"bibr19-0363546515620382","doi-asserted-by":"publisher","DOI":"10.2106\/JBJS.M.00842"},{"key":"bibr20-0363546515620382","doi-asserted-by":"publisher","DOI":"10.2106\/00004623-200302000-00015"},{"key":"bibr21-0363546515620382","doi-asserted-by":"publisher","DOI":"10.1007\/s11999-012-2689-5"}],"container-title":["The 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