{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,1]],"date-time":"2026-05-01T23:06:52Z","timestamp":1777676812999,"version":"3.51.4"},"reference-count":36,"publisher":"SAGE Publications","issue":"5","license":[{"start":{"date-parts":[[2019,6,30]],"date-time":"2019-06-30T00:00:00Z","timestamp":1561852800000},"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":["HIP International"],"published-print":{"date-parts":[[2020,9]]},"abstract":"<jats:sec>\n                    <jats:title>Introduction:<\/jats:title>\n                    <jats:p>Instability accounts for 1\/3 of revision total hip arthroplasty (rTHA) performed in the UK. Removal of well-fixed femoral stems in rTHA is challenging with a risk of blood loss and iatrogenic damage to the femur. The Bioball universal adaptor (BUA), a modular head neck extension adaptor, provides a mechanism for optimisation of femoral offset, leg length and femoral anteversion. This can avoid the need for femoral stem revision in selected cases. The aim of this study is to present the clinical results and rate of instability following revision with this BUA at a minimum of 2\u2009years follow-up.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Patients and methods:<\/jats:title>\n                    <jats:p>A review of our prospectively collected database was performed. All patients treated with the Bioball device were included. Clinical and radiologic review were performed pre- and post-surgery. Specific enquiry for instability was made. The Oxford Hip Score (OHS), EuroQol (EQ-5D) score and WOMAC scores were calculated pre-and post-operatively. Complications were recorded.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>32 rTHA procedures were performed using the Bioball device between 2013 and 2016. 4 patients did not wish to complete post-operative questionnaires. 2 patients (2\/28, 7%) complained of recurrent dislocations following their rTHA procedure. 1 patient complained of instability but no dislocation. The median pre-operative EQ-5D was 0.195 (range \u22120.07\u20130.85), OHS was 20 (range 5\u201343) and WOMAC was 29.8 (range 15.5\u201352.3). The median EQ-5D was 0.85 (range 0.59\u20131), OHS was 39 (range 21\u201348) and WOMAC was 91.1 (range 44.5\u201399.2) at final follow-up. There were significant improvements in the EQ-5D ( p = 0.0009), OHS ( p = 0.0004) and WOMAC ( p = 0.0001).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>The BUA is associated with significant functional improvement and relatively low dislocation rates in revision THA. It is a viable option for use in the revision setting.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/1120700019858345","type":"journal-article","created":{"date-parts":[[2019,7,1]],"date-time":"2019-07-01T01:06:52Z","timestamp":1561943212000},"page":"609-616","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":11,"title":["Clinical outcomes and dislocation rates after hip reconstruction using the Bioball system"],"prefix":"10.1177","volume":"30","author":[{"given":"John","family":"Dabis","sequence":"first","affiliation":[{"name":"Complex Arthroplasty Unit, St George\u2019s University Hospital, London, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jonathan R","family":"Hutt","sequence":"additional","affiliation":[{"name":"Complex Arthroplasty Unit, St George\u2019s University Hospital, London, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"David","family":"Ward","sequence":"additional","affiliation":[{"name":"Kingston Hospital NHS Foundation Trust, Kingston upon Thames, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Richard","family":"Field","sequence":"additional","affiliation":[{"name":"South West London Elective Orthopaedic Centre, Epsom, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Philip A","family":"Mitchell","sequence":"additional","affiliation":[{"name":"Complex Arthroplasty Unit, St George\u2019s University Hospital, London, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nemandra Amir","family":"Sandiford","sequence":"additional","affiliation":[{"name":"Complex Arthroplasty Unit, St George\u2019s University Hospital, London, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2019,6,30]]},"reference":[{"key":"bibr1-1120700019858345","unstructured":"National Joint Registry for England, Wales, Northern Ireland and the Isle of Man. 14th annual report, http:\/\/www.njrreports.org.uk\/Portals\/0\/PDFdownloads\/NJR%2014th%20Annual%20Report%202017.pdf (2017, accessed 27\/11\/2018)."},{"key":"bibr2-1120700019858345","unstructured":"The Swedish Arthroplasty Register. Annual report 2015, https:\/\/registercentrum.blob.core.windows.net\/shpr\/r\/Annual-Report-2015-H19dFINOW.pdf (2015, accessed 27\/11\/2018)."},{"key":"bibr3-1120700019858345","unstructured":"Australian Orthopaedic Association. National joint replacement registry, hip, knee & shoulder arthroplasty. Annual report 2017, https:\/\/aoanjrr.sahmri.com\/documents\/10180\/397736\/Hip%2C%20Knee%20%26%20Shoulder%20Arthroplasty (2017, accessed 27\/11\/2018)."},{"key":"bibr4-1120700019858345","doi-asserted-by":"publisher","DOI":"10.1155\/2017\/8925050"},{"key":"bibr5-1120700019858345","doi-asserted-by":"publisher","DOI":"10.1016\/j.jor.2017.07.015"},{"key":"bibr6-1120700019858345","doi-asserted-by":"publisher","DOI":"10.2106\/JBJS.K.00506"},{"key":"bibr7-1120700019858345","doi-asserted-by":"publisher","DOI":"10.1007\/s00264-016-3380-3"},{"key":"bibr8-1120700019858345","doi-asserted-by":"publisher","DOI":"10.2106\/00004623-200210000-00008"},{"key":"bibr9-1120700019858345","doi-asserted-by":"publisher","DOI":"10.1302\/0301-620X.89B8.19424"},{"key":"bibr10-1120700019858345","doi-asserted-by":"publisher","DOI":"10.1186\/1477-7525-6-94"},{"key":"bibr11-1120700019858345","first-page":"1833","volume":"15","author":"Bellamy N","year":"1988","journal-title":"J Rheumatol"},{"key":"bibr12-1120700019858345","doi-asserted-by":"publisher","DOI":"10.1155\/2011\/591253"},{"key":"bibr13-1120700019858345","doi-asserted-by":"publisher","DOI":"10.4103\/0019-5413.118211"},{"key":"bibr14-1120700019858345","doi-asserted-by":"publisher","DOI":"10.1007\/s00402-015-2281-z"},{"key":"bibr15-1120700019858345","doi-asserted-by":"publisher","DOI":"10.1302\/0301-620X.95B3.30084"},{"key":"bibr16-1120700019858345","doi-asserted-by":"publisher","DOI":"10.1007\/s11999-012-2561-7"},{"key":"bibr17-1120700019858345","first-page":"2737","volume":"92","author":"Berend KR","year":"2010","journal-title":"J Bone Joint Surg Am"},{"key":"bibr18-1120700019858345","doi-asserted-by":"publisher","DOI":"10.2106\/00004623-200403000-00004"},{"key":"bibr19-1120700019858345","doi-asserted-by":"publisher","DOI":"10.1007\/s00264-010-1167-5"},{"key":"bibr20-1120700019858345","doi-asserted-by":"publisher","DOI":"10.2106\/00004623-200202000-00012"},{"key":"bibr21-1120700019858345","doi-asserted-by":"publisher","DOI":"10.1016\/j.arth.2013.11.028"},{"key":"bibr22-1120700019858345","doi-asserted-by":"publisher","DOI":"10.5435\/JAAOS-D-15-00144"},{"key":"bibr23-1120700019858345","doi-asserted-by":"publisher","DOI":"10.5301\/hipint.5000140"},{"key":"bibr24-1120700019858345","doi-asserted-by":"publisher","DOI":"10.1186\/s12891-016-1329-8"},{"key":"bibr25-1120700019858345","doi-asserted-by":"publisher","DOI":"10.1097\/00003086-200208000-00018"},{"key":"bibr26-1120700019858345","first-page":"91","author":"Collier JP","year":"1995","journal-title":"Clin Orthop Relat Res"},{"key":"bibr27-1120700019858345","doi-asserted-by":"publisher","DOI":"10.1016\/j.arth.2009.10.018"},{"key":"bibr28-1120700019858345","first-page":"80","author":"Cook SD","year":"1994","journal-title":"Clin Orthop Relat Res"},{"key":"bibr29-1120700019858345","doi-asserted-by":"publisher","DOI":"10.1007\/s00264-013-1927-0"},{"key":"bibr30-1120700019858345","doi-asserted-by":"publisher","DOI":"10.1002\/(SICI)1097-4636(199602)30:2<181::AID-JBM7>3.0.CO;2-N"},{"key":"bibr31-1120700019858345","first-page":"27","author":"Bobyn JD","year":"1994","journal-title":"Clin Orthop Relat Res"},{"key":"bibr32-1120700019858345","doi-asserted-by":"publisher","DOI":"10.1002\/jab.770060104"},{"key":"bibr33-1120700019858345","doi-asserted-by":"publisher","DOI":"10.1016\/j.arth.2008.09.009"},{"key":"bibr34-1120700019858345","doi-asserted-by":"publisher","DOI":"10.1302\/0301-620X.76B1.8300685"},{"key":"bibr35-1120700019858345","doi-asserted-by":"publisher","DOI":"10.1302\/0301-620X.98B5.35592"},{"key":"bibr36-1120700019858345","doi-asserted-by":"publisher","DOI":"10.1007\/s00264-009-0729-x"}],"container-title":["HIP International"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/1120700019858345","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/full-xml\/10.1177\/1120700019858345","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/1120700019858345","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T08:21:16Z","timestamp":1777450876000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.sagepub.com\/doi\/10.1177\/1120700019858345"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2019,6,30]]},"references-count":36,"journal-issue":{"issue":"5","published-print":{"date-parts":[[2020,9]]}},"alternative-id":["10.1177\/1120700019858345"],"URL":"https:\/\/doi.org\/10.1177\/1120700019858345","relation":{},"ISSN":["1120-7000","1724-6067"],"issn-type":[{"value":"1120-7000","type":"print"},{"value":"1724-6067","type":"electronic"}],"subject":[],"published":{"date-parts":[[2019,6,30]]}}}