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However, the lack of an established classification system hampers implementation and progress.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Methods<\/jats:title>\n                <jats:p>We formulated a novel classification system based on pelvic defect morphology and 3D-printed hemipelvis endoprostheses. It integrates surgical approach, osteotomy guide plate and prosthesis design, postoperative rehabilitation plans, and perioperative processes.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>Retrospectively analyzing 60 patients (31 males, 29 females), we classified them into Type A (15 patients: Aa\u2009=\u20096, Ab\u2009=\u20099), Type B (27 patients: Ba\u2009=\u200915, Bb\u2009=\u200912), Type C (17 patients). All underwent customized osteotomy guide plate-assisted tumor resection and 3D-printed hemipelvic endoprosthesis reconstruction. Follow-up duration was median 36.5\u2009\u00b1\u200915.0 months (range, 6 to 74 months). The mean operating time was 430.0\u2009\u00b1\u2009106.7\u00a0min, intraoperative blood loss 2018.3\u2009\u00b1\u20091305.6\u00a0ml, transfusion volume 2510.0\u2009\u00b1\u20091778.1\u00a0ml. Complications occurred in 13 patients (21.7%), including poor wound healing (10.0%), deep prosthesis infection (6.7%), hip dislocation (3.3%), screw fracture (1.7%), and interface loosening (1.7%). VAS score improved from 5.5\u2009\u00b1\u20091.4 to 1.7\u2009\u00b1\u20091.3, MSTS-93 score from 14.8\u2009\u00b1\u20092.5 to 23.0\u2009\u00b1\u20095.6. Implant osseointegration success rate was 98.5% (128\/130), with one Type Ba patient experiencing distal prosthesis loosening.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>The West China classification may supplement the Enneking and Dunham classification, enhancing interdisciplinary communication and surgical outcomes. However, further validation and wider adoption are required to confirm clinical effectiveness.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s12891-024-07509-8","type":"journal-article","created":{"date-parts":[[2024,5,16]],"date-time":"2024-05-16T07:02:09Z","timestamp":1715842929000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["3D-Printed custom-made hemipelvic endoprosthetic reconstruction following periacetabular tumor resection: utilizing a novel classification system"],"prefix":"10.1186","volume":"25","author":[{"given":"Xin","family":"Hu","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Minxun","family":"Lu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yitian","family":"Wang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yi","family":"Luo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yong","family":"Zhou","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiao","family":"Yang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Li","family":"Min","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chongqi","family":"Tu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2024,5,16]]},"reference":[{"key":"7509_CR1","doi-asserted-by":"crossref","unstructured":"Lucas DR. 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