{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T17:25:46Z","timestamp":1790270746790,"version":"4.1.0"},"reference-count":30,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2024,12,19]],"date-time":"2024-12-19T00:00:00Z","timestamp":1734566400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JPM"],"abstract":"<jats:p>Background\/Objectives: Instability is a major reason for revision after total hip arthroplasty (THA), and acetabular cup placement in the \u201ctraditional\u201d safe zone does not protect against dislocations. Spinopelvic mobility may play a role in impingement and dislocation after THA. Personalized acetabular cup placement that incorporates spinopelvic mobility is currently lacking in the literature. Methods: The spinopelvic motion of 116 patients was evaluated during preoperative planning. All patients underwent radiological assessments with an anteroposterior pelvis radiograph in the standing and supine positions and a lateral view of the lumbar spine and pelvis in the standing and sitting positions. The pelvic incidence, pelvic tilt, sacral slope, standing anterior pelvic plane tilt, sitting anterior pelvic plane tilt, and lumbar lordosis angle were measured, and the degree of pelvic motion from standing to sitting was calculated. The development of the patient-specific target for the acetabular cup was based on the mean mobility of the whole group and the specific posture of each patient. Results: The average pelvic incidence was 51.0 \u00b1 13.1 degrees, the sacral slope was 35.0 \u00b1 10.3 degrees, the pelvic tilt was 16.0 \u00b1 13.3 degrees, the standing anterior pelvic plane tilt was 3.4 \u00b1 12 degrees backward, and the degree of lumbar lordosis was 39.5 \u00b1 11.3 degrees. The mean spinopelvic mobility was 27.3 \u00b1 13.4 degrees. The measurements had good to excellent interobserver and intraobserver reliability. On the basis of these measurements, we developed a novel algorithm for a patient-specific target for acetabular cup placement. Conclusions: the evaluation of spinopelvic mobility has good to excellent interobserver and intraobserver reliability and can be used for personalized acetabular cup placement.<\/jats:p>","DOI":"10.3390\/jpm14121161","type":"journal-article","created":{"date-parts":[[2024,12,20]],"date-time":"2024-12-20T04:07:40Z","timestamp":1734667660000},"page":"1161","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Spinopelvic Motion Evaluation in Patients Undergoing Total Hip Arthroplasty and Patient-Specific Target for Acetabular Cup Placement"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1811-6290","authenticated-orcid":false,"given":"Antonios A.","family":"Koutalos","sequence":"first","affiliation":[{"name":"Orthopaedic Department, School of Health Sciences, Faculty of Medicine, University of Thessaly, 41110 Larissa, Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0368-0465","authenticated-orcid":false,"given":"Nifon K.","family":"Gkekas","sequence":"additional","affiliation":[{"name":"Orthopaedic Department, School of Health Sciences, Faculty of Medicine, University of Thessaly, 41110 Larissa, Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-7889-3829","authenticated-orcid":false,"given":"Vasileios","family":"Akrivos","sequence":"additional","affiliation":[{"name":"Orthopaedic Department, School of Health Sciences, Faculty of Medicine, University of Thessaly, 41110 Larissa, Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6784-6022","authenticated-orcid":false,"given":"Nikolaos","family":"Stefanou","sequence":"additional","affiliation":[{"name":"Orthopaedic Department, School of Health Sciences, Faculty of Medicine, University of Thessaly, 41110 Larissa, Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9043-0535","authenticated-orcid":false,"given":"Theofilos","family":"Karachalios","sequence":"additional","affiliation":[{"name":"Orthopaedic Department, School of Health Sciences, Faculty of Medicine, University of Thessaly, 41110 Larissa, Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,12,19]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"811","DOI":"10.1302\/0301-620X.104B7.BJJ-2021-1732.R1","article-title":"Treatment patterns and clinical and economic burden of hip dislocation following primary total hip arthroplasty in England","volume":"104","author":"Galvain","year":"2022","journal-title":"Bone Jt. J."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1316","DOI":"10.1016\/j.arth.2018.01.047","article-title":"Prevention of dislocation after total hip arthroplasty","volume":"33","author":"Rowan","year":"2018","journal-title":"J. Arthroplast."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"808","DOI":"10.1302\/0301-620X.101B7.BJJ-2018-1188.R1","article-title":"A systematic approach to the hip-spine relationship and its applications to total hip arthroplasty","volume":"101","author":"Eftekhary","year":"2019","journal-title":"Bone Jt. J."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"686","DOI":"10.1007\/s00586-011-1937-9","article-title":"Hip-spine relations and sagittal balance clinical consequences","volume":"20","author":"Lazennec","year":"2011","journal-title":"Eur. Spine J."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"978","DOI":"10.2106\/JBJS.M.00765","article-title":"Predictability of acetabular component angular change with postural shift from standing to sitting position","volume":"96","author":"Kanawade","year":"2014","journal-title":"J. Bone Jt. Surg. Am."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"1821","DOI":"10.1007\/s00402-024-05227-3","article-title":"Hip-spine relationship: Clinical evidence and biomechanical issues","volume":"144","author":"Geraci","year":"2024","journal-title":"Arch. Orthop. Trauma. Surg."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"217","DOI":"10.2106\/00004623-197860020-00014","article-title":"Dislocations after total hip-replacement arthroplasties","volume":"60","author":"Lewinnek","year":"1978","journal-title":"J. Bone Jt. Surg. Am."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"397","DOI":"10.2106\/JBJS.21.00432","article-title":"Integrating the Combined Sagittal Index reduces the risk of dislocation following total hip replacement","volume":"104","author":"Grammatopoulos","year":"2022","journal-title":"J. Bone Jt. Surg. Am."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"17","DOI":"10.1302\/0301-620X.103B7.BJJ-2020-2448.R2","article-title":"2021 Otto Aufranc Award: A simple Hip-Spine Classification for total hip arthroplasty: Validation and a large multicentre series","volume":"103","author":"Vigdorchik","year":"2021","journal-title":"Bone Jt. J."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"144","DOI":"10.1177\/1120700020949837","article-title":"Applying the hip-spine relationship in total hip arthroplasty","volume":"31","author":"Wiznia","year":"2021","journal-title":"Hip Int."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"182","DOI":"10.1302\/0301-620X.70B2.3346284","article-title":"Low friction arthroplasty for old untreated congenital dislocation of the hip","volume":"70","author":"Hartofilakidis","year":"1988","journal-title":"J. Bone Jt. Surg. Br."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"99","DOI":"10.1007\/s005860050038","article-title":"Pelvic incidence: A fundamental pelvic parameter for three-dimensional regulation of spinal sagittal curves","volume":"7","author":"Legaye","year":"1998","journal-title":"Eur. Spine J."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"164","DOI":"10.1302\/0301-620X.97B2.34294","article-title":"The effect of orientation of the acetabular component on outcome following total hip arthroplasty with small diameter hard-on-soft bearings","volume":"97","author":"Grammatopoulos","year":"2015","journal-title":"Bone Jt. J."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"357","DOI":"10.2106\/JBJS.F.00628","article-title":"The rationale for tilt-adjusted acetabular cup navigation","volume":"90","author":"Babisch","year":"2008","journal-title":"J. Bone Jt. Surg. Am."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"517","DOI":"10.1080\/17453670510041501","article-title":"Pelvic tilt makes acetabular cup navigation inaccurate","volume":"76","author":"Lembeck","year":"2005","journal-title":"Acta Orthop."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"373","DOI":"10.1016\/j.otsr.2011.02.006","article-title":"Pelvis and total hip arthroplasty acetabular component orientations in sitting and standing positions: Measurements reproductibility with EOS imaging system versus conventional radiographies","volume":"97","author":"Lazennec","year":"2011","journal-title":"Orthop. Traumatol. Surg. Res."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"2999","DOI":"10.1016\/j.asjsur.2024.01.133","article-title":"Artificial intelligence technology improves the ac-curacy of preoperative planning in primary total hip arthroplasty","volume":"47","author":"Anwar","year":"2024","journal-title":"Asian J. Surg."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"E909","DOI":"10.1097\/BSD.0000000000000491","article-title":"Reliability of sagittal spinopelvic alignment measurements after total hip arthroplasty","volume":"30","author":"Pernaa","year":"2017","journal-title":"Clin. Spine Surg."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"101288","DOI":"10.1016\/j.artd.2023.101288","article-title":"The Hip-spine assessment of a novel surgical planning software provides acetabular component targets that are reliable and in agreement with current clinical recommendations","volume":"25","author":"McIntosh","year":"2024","journal-title":"Arthroplast. Today"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"3758","DOI":"10.1016\/j.arth.2020.06.056","article-title":"Reliability of spinopelvic measurements that may influence the cup position in total hip arthroplasty","volume":"35","author":"Elkins","year":"2020","journal-title":"J. Arthroplast."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"E119","DOI":"10.1097\/BSD.0000000000000448","article-title":"Measurement of spinopelvic parameters on standing lateral lumbar radiographs: Validity and reliability","volume":"30","author":"Chung","year":"2017","journal-title":"Clin. Spine Surg."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"E253","DOI":"10.1097\/BRS.0000000000000720","article-title":"The reliability of sagittal pelvic parameters: The effect of lumbosacral instrumentation and measurement experience","volume":"40","author":"Acaroglu","year":"2015","journal-title":"Spine"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"140","DOI":"10.1097\/01.blo.0000069891.31220.fd","article-title":"Measurements of pelvic flexion angle using three-dimensional computed tomography","volume":"411","author":"Nishihara","year":"2003","journal-title":"Clin. Orthop. Relat. Res."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"616","DOI":"10.1016\/j.arth.2016.07.046","article-title":"A comparison of radiographic outcomes after total hip arthroplasty between the posterior approach and direct anterior approach with intraoperative fluoroscopy","volume":"32","author":"Lin","year":"2017","journal-title":"J. Arthroplast."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"2797","DOI":"10.1007\/s00264-021-05165-4","article-title":"Accuracy of acetabular cup placement positively correlates with level of training","volume":"45","author":"Suhardi","year":"2021","journal-title":"Int. Orthop."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"68","DOI":"10.1016\/j.artd.2022.08.004","article-title":"Accuracy and precision of acetabular component position does not differ between the anterior and posterior approaches to total hip arthroplasty with robotic assistance: A matched-pair analysis","volume":"18","author":"Kunze","year":"2022","journal-title":"Arthroplast. Today"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"691","DOI":"10.1007\/s00264-022-05624-6","article-title":"Image-based robotic-assisted total hip arthroplasty through direct anterior approach allows a better orientation of the acetabular cup and a better restitution of the centre of rotation than a conventional procedure","volume":"47","author":"Foissey","year":"2023","journal-title":"Int. Orthop."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"2199","DOI":"10.1016\/j.arth.2022.05.017","article-title":"The functional mechanics of the acetabular component in total hip arthroplasty","volume":"37","author":"Bodner","year":"2022","journal-title":"J. Arthroplast."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"1845","DOI":"10.2106\/JBJS.18.00078","article-title":"Late dislocation following total hip arthroplasty: Spinopelvic imbalance as a causative factor","volume":"100","author":"Heckmann","year":"2018","journal-title":"J. Bone Jt. Surg. Am."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"41","DOI":"10.1016\/j.jor.2021.08.009","article-title":"Low dislocation rates with the use of patient specific \u201cSafe zones\u201d in total hip arthroplasty","volume":"27","author":"Sharma","year":"2021","journal-title":"J. Orthop."}],"container-title":["Journal of Personalized Medicine"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2075-4426\/14\/12\/1161\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T16:55:59Z","timestamp":1760115359000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2075-4426\/14\/12\/1161"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2024,12,19]]},"references-count":30,"journal-issue":{"issue":"12","published-online":{"date-parts":[[2024,12]]}},"alternative-id":["jpm14121161"],"URL":"https:\/\/doi.org\/10.3390\/jpm14121161","relation":{},"ISSN":["2075-4426"],"issn-type":[{"value":"2075-4426","type":"electronic"}],"subject":[],"published":{"date-parts":[[2024,12,19]]}}}