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We also evaluated the hips clinically using the Harris hip score and assessed acetabular orientation by radiography before surgery and after one year. The mean overall magnitude of acceleration was significantly reduced from 2.30 m\/s <jats:sup>2<\/jats:sup> (sd 0.57) before operation to 1.55 m\/s <jats:sup>2<\/jats:sup> (sd 0.31) afterwards. The mean Harris hip score improved from 78.08 (47 to 96) to 95.36 points (88 to 100). The radiographic parameters all showed significant improvements. <\/jats:p><jats:p> This study suggests that periacetabular osteotomy provides pain relief, improves acetabular cover and reduces the dynamic instability in patients with dysplastic hips. <\/jats:p>","DOI":"10.1302\/0301-620x.91b11.21796","type":"journal-article","created":{"date-parts":[[2009,10,31]],"date-time":"2009-10-31T21:17:52Z","timestamp":1257023872000},"page":"1438-1442","source":"Crossref","is-referenced-by-count":25,"title":["Periacetabular osteotomy reduces the dynamic instability of dysplastic hips"],"prefix":"10.1302","volume":"91-B","author":[{"given":"A.","family":"Maeyama","sequence":"first","affiliation":[{"name":"Department of Orthopaedic Surgery, School of Medicine Fukuoka University 7-45-1 Nanakuma, Jonan-ku, Fukuoka 814-0180, Japan."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M.","family":"Naito","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, School of Medicine Fukuoka University 7-45-1 Nanakuma, Jonan-ku, Fukuoka 814-0180, Japan."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"S.","family":"Moriyama","sequence":"additional","affiliation":[{"name":"Department of Engineering, Faculty of Engineering Fukuoka University, 8-19-1 Nanakuma, Jonan-ku, Fukuoka 814-0180, Japan."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"I.","family":"Yoshimura","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, School of Medicine Fukuoka University 7-45-1 Nanakuma, Jonan-ku, Fukuoka 814-0180, Japan."}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"42","reference":[{"key":"R1","unstructured":"Aronson J. 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