{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,2,21]],"date-time":"2025-02-21T21:36:37Z","timestamp":1740173797293,"version":"3.37.3"},"reference-count":20,"publisher":"Oxford University Press (OUP)","issue":"Supplement_1","license":[{"start":{"date-parts":[[2021,6,23]],"date-time":"2021-06-23T00:00:00Z","timestamp":1624406400000},"content-version":"vor","delay-in-days":22,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"funder":[{"name":"European Society for Sports Traumatology"},{"name":"Knee Surgery and Arthroscopy"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2021,6,23]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Femoro-acetabular impingement (FAI), is the result of an abnormal morphology of the hip joint. On the femoral side, asphericity of the head can be highlighted by an alpha angle measurement &amp;gt;50\u00b0 on computed tomography or MRI. However, some particular cephalic asphericities can make it difficult to measure the alpha angle, leading to a diagnostic pitfall. While in the classic cam effect, the deformity is peripheral and can be treated by arthroscopic femoroplasty, an apical head deformity remains a therapeutic challenge. We present the case of a 17-year-old male patient with a femoral head deformity, corresponding to an ISHA zone 6 overhang, significantly improved in everyday and sports life by arthroscopic trapdoor technique to resect the focal central deformity while enabling concomitant treatment of central compartment pathology, in this case, a hypertrophic ligamentum teres and femoral head chondral flap. Etiology of this femoral head deformity remains uncertain but could be a particular cam deformity, sequelae to pediatric disease or instability with repeated traction of the ligament teres on the femoral head apical insertion during cephalic growth.<\/jats:p>","DOI":"10.1093\/jhps\/hnab026","type":"journal-article","created":{"date-parts":[[2021,6,23]],"date-time":"2021-06-23T16:50:27Z","timestamp":1624467027000},"page":"i25-i33","source":"Crossref","is-referenced-by-count":3,"title":["Unusual apical femoral head deformity treated by hip arthroscopy and tunnel drilling through femoral head: a case report"],"prefix":"10.1093","volume":"8","author":[{"given":"Boris","family":"Morattel","sequence":"first","affiliation":[{"name":"Orthopaedic Surgeon, Lyon Ortho Clinic, 29B Avenue des sources, Lyon 69009, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9687-0216","authenticated-orcid":false,"given":"Nicolas","family":"Bonin","sequence":"additional","affiliation":[{"name":"Orthopaedic Surgeon, Lyon Ortho Clinic, 29B Avenue des sources, Lyon 69009, France"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"286","published-online":{"date-parts":[[2021,6,23]]},"reference":[{"key":"2021070819533477400_hnab026-B1","doi-asserted-by":"crossref","first-page":"112","DOI":"10.1097\/01.blo.0000096804.78689.c2","article-title":"Femoroacetabular impingement: a cause for osteoarthritis of the hip","volume":"417","author":"Ganz","year":"2003","journal-title":"Clin Orthop Relat Res"},{"key":"2021070819533477400_hnab026-B2","doi-asserted-by":"crossref","first-page":"556","DOI":"10.1302\/0301-620X.84B4.0840556","article-title":"The contour of the femoral head-neck junction as a predictor for the risk of anterior impingement","volume":"84-B","author":"Notzli","year":"2002","journal-title":"J Bone Joint Surg Br"},{"key":"2021070819533477400_hnab026-B3","doi-asserted-by":"crossref","first-page":"651","DOI":"10.1007\/s11999-008-0617-5","article-title":"Do normal radiographs exclude asphericity of the femoral head-neck junction?","volume":"467","author":"Dudda","year":"2009","journal-title":"Clin Orthop Relat Res"},{"key":"2021070819533477400_hnab026-B4","doi-asserted-by":"crossref","first-page":"1540","DOI":"10.2214\/AJR.06.0921","article-title":"Femoroacetabular impingement: radiographic diagnosis\u2014what the radiologist should know","volume":"188","author":"Tannast","year":"2007","journal-title":"Am J Roentgenol"},{"key":"2021070819533477400_hnab026-B5","doi-asserted-by":"crossref","first-page":"1862","DOI":"10.1016\/j.arthro.2018.01.050","article-title":"Minimal clinically important difference and substantial clinical benefit after revision hip arthroscopy","volume":"34","author":"Nwachukwu","year":"2018","journal-title":"Arthroscopy"},{"key":"2021070819533477400_hnab026-B6","doi-asserted-by":"crossref","first-page":"3168","DOI":"10.1007\/s11999-010-1489-z","article-title":"Algorithm for combined femoral and periacetabular osteotomies in complex hip deformities","volume":"468","author":"Ganz","year":"2010","journal-title":"Clin Orthop Relat Res"},{"key":"2021070819533477400_hnab026-B7","first-page":"241","article-title":"Extended retinacular soft tissue flap for intraarticular hip surgery: surgical technique, indications, and results of its application","volume":"58","author":"Ganz","year":"2009","journal-title":"Instr Course Lect"},{"key":"2021070819533477400_hnab026-B8","doi-asserted-by":"crossref","first-page":"1119","DOI":"10.1302\/0301-620X.83B8.0831119","article-title":"Surgical dislocation of the adult hip: a technique with full access to the femoral head and acetabulum without the risk of avascular necrosis","volume":"83","author":"Ganz","year":"2001","journal-title":"J Bone Joint Surg Br"},{"key":"2021070819533477400_hnab026-B9","doi-asserted-by":"crossref","first-page":"1018","DOI":"10.1016\/j.joca.2015.02.012","article-title":"Comparison of four chondral repair techniques in the hip joint: a biomechanical study using a physiological human cadaveric model","volume":"23","author":"Cassar-Gheiti","year":"2015","journal-title":"Osteoarthr Cartil"},{"key":"2021070819533477400_hnab026-B10","first-page":"122","article-title":"Current surgical options and innovation for repairing articular cartilage defects in femoral head","volume":"21","author":"Du","year":"2020","journal-title":"J Orthop Transl"},{"key":"2021070819533477400_hnab026-B11","doi-asserted-by":"crossref","first-page":"767","DOI":"10.1007\/s00167-019-05442-1","article-title":"Promising outcomes of hip mosaicplasty by minimally invasive anterior approach using osteochondral autografts from the ipsilateral femoral head","volume":"28","author":"Viamont-Guerra","year":"2020","journal-title":"Knee Surg Sports Traumatol Arthrosc"},{"key":"2021070819533477400_hnab026-B12","doi-asserted-by":"crossref","first-page":"e239","DOI":"10.1016\/j.eats.2019.10.003","article-title":"Osteochondral allograft implantation using the Smith-Peterson (anterior) approach for chondral lesions of the femoral head","volume":"9","author":"Chen","year":"2020","journal-title":"Arthrosc Tech"},{"key":"2021070819533477400_hnab026-B13","doi-asserted-by":"crossref","first-page":"2325967119859287","DOI":"10.1177\/2325967119859287","article-title":"Evolution of a posttraumatic femoral head bone cyst: a case study and surgical management","volume":"7","author":"Ziino","year":"2019","journal-title":"Orthop J Sports Med"},{"key":"2021070819533477400_hnab026-B14","doi-asserted-by":"crossref","first-page":"56","DOI":"10.1302\/0301-620X.80B1.0800056","article-title":"The trapdoor procedure using autogenous cortical and cancellous bone grafts for osteonecrosis of the femoral head","volume":"80","author":"Mont","year":"1998","journal-title":"J Bone Joint Surg Br"},{"key":"2021070819533477400_hnab026-B15","doi-asserted-by":"crossref","first-page":"3462","DOI":"10.1007\/s11999-014-3771-y","article-title":"What are the results using the modified trapdoor procedure to treat chondroblastoma of the femoral head?","volume":"472","author":"Xu","year":"2014","journal-title":"Clin Orthop Relat Res"},{"key":"2021070819533477400_hnab026-B16","doi-asserted-by":"crossref","first-page":"140","DOI":"10.1093\/jhps\/hnz070","article-title":"Ligamentum teres reconstruction: indications, technique and minimum 1-year results in nine patients","volume":"7","author":"O'Donnell","year":"2020","journal-title":"J Hip Preserv Surg"},{"key":"2021070819533477400_hnab026-B17","doi-asserted-by":"crossref","first-page":"164","DOI":"10.1093\/jhps\/hnz023","article-title":"Application of three-dimensional printing for pre-operative planning in hip preservation surgery","volume":"6","author":"Bockhorn","year":"2019","journal-title":"J Hip Preserv Surg"},{"key":"2021070819533477400_hnab026-B18","doi-asserted-by":"crossref","first-page":"1099","DOI":"10.1177\/0363546512438381","article-title":"The development of Cam-type deformity in adolescent and young male soccer players","volume":"40","author":"Agricola","year":"2012","journal-title":"Am J Sports Med"},{"key":"2021070819533477400_hnab026-B19","doi-asserted-by":"crossref","first-page":"3229","DOI":"10.1007\/s11999-011-1945-4","article-title":"The cam-type deformity of the proximal femur arises in childhood in response to vigorous sporting activity","volume":"469","author":"Siebenrock","year":"2011","journal-title":"Clin Orthop Relat Res"},{"key":"2021070819533477400_hnab026-B20","doi-asserted-by":"crossref","first-page":"209","DOI":"10.1302\/0301-620X.92B2.22850","article-title":"Genetic influences in the aetiology of femoroacetabular impingement: a sibling study","volume":"92-B","author":"Pollard","year":"2010","journal-title":"J Bone Joint Surg Br"}],"container-title":["Journal of Hip Preservation Surgery"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/academic.oup.com\/jhps\/article-pdf\/8\/Supplement_1\/i25\/38817145\/hnab026.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"http:\/\/academic.oup.com\/jhps\/article-pdf\/8\/Supplement_1\/i25\/38817145\/hnab026.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,1,1]],"date-time":"2023-01-01T08:40:31Z","timestamp":1672562431000},"score":1,"resource":{"primary":{"URL":"https:\/\/academic.oup.com\/jhps\/article\/8\/Supplement_1\/i25\/6308474"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,6,1]]},"references-count":20,"journal-issue":{"issue":"Supplement_1","published-online":{"date-parts":[[2021,6,23]]},"published-print":{"date-parts":[[2021,6,23]]}},"URL":"https:\/\/doi.org\/10.1093\/jhps\/hnab026","relation":{},"ISSN":["2054-8397"],"issn-type":[{"type":"electronic","value":"2054-8397"}],"subject":[],"published-other":{"date-parts":[[2021,6,1]]},"published":{"date-parts":[[2021,6,1]]}}}