{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,2]],"date-time":"2026-05-02T08:18:47Z","timestamp":1777709927171,"version":"3.51.4"},"reference-count":25,"publisher":"Springer Science and Business Media LLC","issue":"6","license":[{"start":{"date-parts":[[2020,4,28]],"date-time":"2020-04-28T00:00:00Z","timestamp":1588032000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2020,4,28]],"date-time":"2020-04-28T00:00:00Z","timestamp":1588032000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["International Orthopaedics (SICOT)"],"published-print":{"date-parts":[[2020,6]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Aim of the study<\/jats:title><jats:p>To compare the outcomes after computer-assisted peri-acetabular osteotomy (PAO) and conventional PAO performed for hip dysplasia (DDH).<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Ninety-one patients (98 hips) were enrolled in this study. In each case, DDH was treated with either conventional PAO, in which the angle and direction of the osteotomy was determined by intra-operative X-ray examination, or with computer-assisted PAO, which used the 3D navigation system. Forty hips underwent conventional PAO and 58 hips underwent computer-assisted PAO.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Japanese Orthopaedic Association hip scores improved significantly from 70.0 points pre-operatively to 90.7 points post-operatively in patients with conventional PAO, and from 74.5 points pre-operatively to 94.2 points post-operatively in patients with computer-assisted PAO. In all patients with computer-assisted PAO, the post-operative AHI and VCA angle were within the radiographic target zone. Some patients with conventional PAO had post-operative AHI and VCA angle outside of the target zone. We performed total hip arthroplasty (THA) on five of the 98 PAO hips (5.1%) after an average follow-up period of 5.4\u00a0years. None of 58 hips (0%) with computer-assisted PAO was revised.<\/jats:p><\/jats:sec><jats:sec><jats:title>Discussion<\/jats:title><jats:p>Computer-assisted PAO enabled intra-operative confirmation of osteotomy sites, and the position of the osteotomized bone fragment could be confirmed in real time. Adequate anterior and lateral coverage of the femoral head in patients with computer-assisted PAO resulted in no need for early conversion to THA, in contrast to conventional PAO.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Computer-assisted PAO not only improved accuracy and safety but also achieved sufficient anterior and lateral displacement to prevent the progression of DDH.<\/jats:p><\/jats:sec>","DOI":"10.1007\/s00264-020-04578-x","type":"journal-article","created":{"date-parts":[[2020,4,28]],"date-time":"2020-04-28T00:02:36Z","timestamp":1588032156000},"page":"1055-1061","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":21,"title":["Outcomes of computer-assisted peri-acetabular osteotomy compared with conventional osteotomy in hip dysplasia"],"prefix":"10.1007","volume":"44","author":[{"given":"Hiroshi","family":"Imai","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tomomi","family":"Kamada","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Joji","family":"Miyawaki","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Akira","family":"Maruishi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Naohiko","family":"Mashima","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hiromasa","family":"Miura","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2020,4,28]]},"reference":[{"issue":"3","key":"4578_CR1","doi-asserted-by":"publisher","first-page":"430","DOI":"10.2106\/00004623-198466030-00017","volume":"66","author":"S Ninomiya","year":"1984","unstructured":"Ninomiya S, Tagawa H (1984) Rotational acetabular osteotomy for the dysplastic hip. J Bone Joint Surg Am 66(3):430\u2013436","journal-title":"J Bone Joint Surg Am"},{"issue":"3","key":"4578_CR2","doi-asserted-by":"publisher","first-page":"404","DOI":"10.2106\/00004623-200203000-00011","volume":"84","author":"Y Hasegawa","year":"2002","unstructured":"Hasegawa Y, Iwase T, Kitamura S, Yamauchi K, Sakano S, Iwata H (2002) Eccentric rotational acetabular osteotomy for acetabular dysplasia: follow-up of one hundred and thirty-two hips for five to ten years. J Bone Joint Surg Am 84(3):404\u2013410","journal-title":"J Bone Joint Surg Am"},{"key":"4578_CR3","first-page":"26","volume":"232","author":"R Ganz","year":"1988","unstructured":"Ganz R, Klaue K, Vinh TS, Mast JW (1988) A new periacetabular osteotomy for the treatment of hip dysplasia: technique and preliminary results. Clin Orthop Relat Res 232:26\u201336","journal-title":"Clin Orthop Relat Res"},{"key":"4578_CR4","doi-asserted-by":"publisher","first-page":"129","DOI":"10.1097\/01.blo.0000153281.75265.1d","volume":"433","author":"M Naito","year":"2005","unstructured":"Naito M, Shiramizu K, Akiyoshi Y, Ezoe M, Nakamura Y (2005) Curved periacetabular osteotomy for treatment of dysplastic hip. Clin Orthop Relat Res 433:129\u2013135","journal-title":"Clin Orthop Relat Res"},{"key":"4578_CR5","doi-asserted-by":"crossref","first-page":"112","DOI":"10.1097\/01.blo.0000096804.78689.c2","volume":"417","author":"R Ganz","year":"2003","unstructured":"Ganz R, Parvizi J, Beck M, Leunig M, N\u00f6tzli H, Siebenrock KA (2003) Femoroacetabular impingement. Clin Orthop Relat Res 417:112\u2013120","journal-title":"Clin Orthop Relat Res"},{"key":"4578_CR6","doi-asserted-by":"publisher","first-page":"762","DOI":"10.1007\/s00776-014-0592-5","volume":"19","author":"H Imai","year":"2014","unstructured":"Imai H, Kamada T, Takeba J, Shiraishi Y, Mashima N, Miura H (2014) Anterior coverage after rotational acetabular osteotomy for the treatment of developmental dysplasia of the hip. J Orthop Sci 19:762\u2013769","journal-title":"J Orthop Sci"},{"key":"4578_CR7","doi-asserted-by":"publisher","first-page":"77","DOI":"10.1097\/01.blo.0000126866.29933.42","volume":"421","author":"LP Amiot","year":"2004","unstructured":"Amiot LP, Poulin F (2004) Computer tomography-based navigation for hip, knee, and spine surgery. Clin Orthop Relat Res 421:77\u201386","journal-title":"Clin Orthop Relat Res"},{"issue":"12","key":"4578_CR8","doi-asserted-by":"publisher","first-page":"1747","DOI":"10.2106\/00004623-199912000-00014","volume":"81","author":"D T\u00f6nnis","year":"1999","unstructured":"T\u00f6nnis D, Heinecke A (1999) Acetabular and femoral anteversion: relationship with osteoarthritis of the hip. J Bone Joint Surg Am 81(12):1747\u20131770","journal-title":"J Bone Joint Surg Am"},{"issue":"1","key":"4578_CR9","doi-asserted-by":"publisher","first-page":"65","DOI":"10.2106\/00004623-195335010-00007","volume":"35","author":"G Wiberg","year":"1953","unstructured":"Wiberg G (1953) Shelf operation in congenital dysplasia of the acetabulum and in subluxation and dislocation of the hip. J Bone Joint Surg Am 35(1):65\u201380","journal-title":"J Bone Joint Surg Am"},{"issue":"4","key":"4578_CR10","doi-asserted-by":"publisher","first-page":"455","DOI":"10.1302\/0301-620X.89B4.18458","volume":"89","author":"N Sugano","year":"2007","unstructured":"Sugano N, Nishii T, Miki H, Yoshikawa H, Sato Y, Tamura S (2007) Mid-term results of cementless total hip replacement using a ceramic-on ceramic bearing with and without computer navigation. J Bone Joint Surg 89(4):455\u2013460","journal-title":"J Bone Joint Surg"},{"key":"4578_CR11","unstructured":"Lequesne Par M, De S\u00e9ze S: False profile of the pelvis (1961) A new radiographic incidence for the study of the hip-its use in dysplasias and different coxapathies (in French). Rev. Rhum Mal Osteoartic 28:643\u2013652"},{"key":"4578_CR12","doi-asserted-by":"publisher","first-page":"8","DOI":"10.1007\/s00776-004-0845-9","volume":"10","author":"J Mibe","year":"2005","unstructured":"Mibe J, Imakiire A, Watanabe T, Fujie T (2005) Results of total hip arthroplasty with bone graft and support ring for protrusion acetabuli in rheumatoid arthritis. J Orthop Sci 10:8\u201314","journal-title":"J Orthop Sci"},{"key":"4578_CR13","doi-asserted-by":"publisher","first-page":"268","DOI":"10.1302\/0301-620X.43B2.268","volume":"43","author":"IK Sharp","year":"1961","unstructured":"Sharp IK (1961) Acetabular dysplasia: the acetabular angle. J Bone Joint Surg (Br) 43:268\u2013272","journal-title":"J Bone Joint Surg (Br)"},{"key":"4578_CR14","doi-asserted-by":"publisher","first-page":"457","DOI":"10.1080\/01621459.1958.10501452","volume":"53","author":"EL Kaplan","year":"1958","unstructured":"Kaplan EL, Meier P (1958) Nonparametric estimation from incomplete observations. J Am Statist Assn 53:457","journal-title":"J Am Statist Assn"},{"key":"4578_CR15","first-page":"1","volume":"26","author":"AA Montgomery","year":"2002","unstructured":"Montgomery AA, Graham A, Evans PH, Fahey T (2002) Inter-rater agreement in the scoring of abstracts submitted to a primary care research conference. BMC Health Serv Res 26:1\u20138","journal-title":"BMC Health Serv Res"},{"issue":"6","key":"4578_CR16","doi-asserted-by":"publisher","first-page":"1405","DOI":"10.1007\/s00264-019-04315-z","volume":"43","author":"Y Li","year":"2019","unstructured":"Li Y, Guo Y, Shen X, Liu H, Mei H, Xu H, Canavese F, Chinese Multi-center Pediatric Orthopedic Study group (2019) Radiographic outcome of children older than twenty-four months with developmental dysplasia of the hip treated by closed reduction and spica cast immobilization in human position: a review of fifty-one hips. Int Orthop 43(6):1405\u20131411","journal-title":"Int Orthop"},{"issue":"7","key":"4578_CR17","doi-asserted-by":"publisher","first-page":"1635","DOI":"10.1007\/s00264-018-4090-9","volume":"43","author":"K Hong","year":"2019","unstructured":"Hong K, Yuan Z, Li Y, Zhi X, Liu Y, Xu H, Canavvese F (2019) Femoral anteversion does not predict redislocation in children with hip dysplasia treated by closed reduction. Int Orthop 43(7):1635\u20131642","journal-title":"Int Orthop"},{"issue":"12","key":"4578_CR18","doi-asserted-by":"publisher","first-page":"2961","DOI":"10.1007\/s00264-018-3946-3","volume":"42","author":"Y Li","year":"2018","unstructured":"Li Y, Xu H, Slongo T, Zhou Q, Liu Y, Chen W, Li J, Canavese F (2018) Bernese-type triple pelvic osteotomy through a single incision in children over five years: a retrospective study of twenty eight cases. Int Orthop 42(12):2961\u20132968","journal-title":"Int Orthop"},{"key":"4578_CR19","doi-asserted-by":"publisher","first-page":"447","DOI":"10.1007\/s00402-011-1435-x","volume":"132","author":"DH Suh","year":"2012","unstructured":"Suh DH, Lee DH, Jeong WK, Park SW, Kang CH, Lee SH (2012) Virtual Bernese osteotomy using three-dimensional computed tomography in hip dysplasia. Arch Orthop Trauma Surg 132:447\u2013454","journal-title":"Arch Orthop Trauma Surg"},{"issue":"2","key":"4578_CR20","doi-asserted-by":"publisher","first-page":"278","DOI":"10.2106\/00004623-200302000-00015","volume":"85","author":"KA Siebenrock","year":"2003","unstructured":"Siebenrock KA, Schoeniger R, Ganz R (2003) Anterior femoro-acetabular impingement due to Acetabular retroversion. Treatment with periacetabular osteotomy. J Bone Joint Surg Am 85(2):278\u2013286","journal-title":"J Bone Joint Surg Am"},{"issue":"11","key":"4578_CR21","doi-asserted-by":"publisher","first-page":"2555","DOI":"10.1007\/s00264-018-3906-y","volume":"42","author":"S Hayashi","year":"2018","unstructured":"Hayashi S, Hashimoto S, Matsumoto T, Takayama K, Shibanuma N, Ishida K, Nishida K, Kuroda R (2018) Computer-assisted surgery prevents complications during periacetabular osteotomy. Int Orthop 42(11):2555\u20132561","journal-title":"Int Orthop"},{"issue":"6","key":"4578_CR22","doi-asserted-by":"publisher","first-page":"1253","DOI":"10.1007\/s00264-017-3706-9","volume":"42","author":"A Matsunaga","year":"2018","unstructured":"Matsunaga A, Akiho S, Kinoshita K, Naito M, Yamamoto T (2018) The prevalence and risk factors for delayed union of the superior pubic ramus at one year after curved periacetabular osteotomy: its risk factor and outcome. Int Orthop 42(6):1253\u20131258","journal-title":"Int Orthop"},{"issue":"5","key":"4578_CR23","doi-asserted-by":"publisher","first-page":"1029","DOI":"10.1007\/s00264-017-3656-2","volume":"42","author":"S Akiho","year":"2018","unstructured":"Akiho S, Kinoshita K, Matsunaga A, Ishii S, Seo H, Nishio J, Yamamoto T (2018) Incidence of delayed union one year after peri-acetabular osteotomy based on computed tomography. Int Orthop 42(5):1029\u20131034","journal-title":"Int Orthop"},{"issue":"11","key":"4578_CR24","doi-asserted-by":"publisher","first-page":"2527","DOI":"10.1007\/s00264-018-3851-9","volume":"42","author":"T Tanaka","year":"2018","unstructured":"Tanaka T, Moro T, Takatori Y, Oshima H, Ito H, Sugita N, Mitsuishi M, Tanaka S (2018) Evaluation of the three-dimensional bony coverage before and after rotational acetabular osteotomy. Int Orthop 42(11):2527\u20132534","journal-title":"Int Orthop"},{"issue":"6","key":"4578_CR25","doi-asserted-by":"publisher","first-page":"1247","DOI":"10.1007\/s00264-017-3673-1","volume":"42","author":"H Hamada","year":"2018","unstructured":"Hamada H, Takao M, Sakai T, Sugano N (2018) Morphological variation of the anterior inferior iliac spine affects hip range of motion in flexion after rotational acetabular osteotomy. Int Orthop 42(6):1247\u20131252","journal-title":"Int Orthop"}],"container-title":["International Orthopaedics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/s00264-020-04578-x.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/article\/10.1007\/s00264-020-04578-x\/fulltext.html","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/s00264-020-04578-x.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2022,10,22]],"date-time":"2022-10-22T11:24:23Z","timestamp":1666437863000},"score":1,"resource":{"primary":{"URL":"https:\/\/link.springer.com\/10.1007\/s00264-020-04578-x"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2020,4,28]]},"references-count":25,"journal-issue":{"issue":"6","published-print":{"date-parts":[[2020,6]]}},"alternative-id":["4578"],"URL":"https:\/\/doi.org\/10.1007\/s00264-020-04578-x","relation":{},"ISSN":["0341-2695","1432-5195"],"issn-type":[{"value":"0341-2695","type":"print"},{"value":"1432-5195","type":"electronic"}],"subject":[],"published":{"date-parts":[[2020,4,28]]},"assertion":[{"value":"27 December 2019","order":1,"name":"received","label":"Received","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"17 April 2020","order":2,"name":"accepted","label":"Accepted","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"28 April 2020","order":3,"name":"first_online","label":"First Online","group":{"name":"ArticleHistory","label":"Article History"}},{"order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Compliance with ethical standards"}},{"value":"The authors declare that they have no conflicts of interest.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interest"}},{"value":"Approval for this study was obtained from our University Graduate School of Medical Science Ethics Committee, with its conduct in accordance with the ethical standards as laid down in the 1964 Declaration of Helsinki and its later amendments.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethical approval"}},{"value":"Informed consent was obtained from all individual participants included in the study.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Informed consent"}}]}}