{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,5]],"date-time":"2026-01-05T11:07:12Z","timestamp":1767611232797,"version":"3.33.0"},"reference-count":30,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2024,11,20]],"date-time":"2024-11-20T00:00:00Z","timestamp":1732060800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004912","name":"Sichuan University","doi-asserted-by":"publisher","award":["20GZ30301"],"award-info":[{"award-number":["20GZ30301"]}],"id":[{"id":"10.13039\/501100004912","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Orthopaedic Surgery"],"published-print":{"date-parts":[[2025,1]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:sec><jats:title>Objective<\/jats:title><jats:p>Osteosarcoma at the first metacarpal is extremely rare. Reconstructing the metacarpal after tumor resection is essential, as the thumb accounts for approximately 40%\u201350% of hand function. Although autografts, arthroplasty, and transposition have been reported as reconstruction options, their use is limited by complications such as secondary injury, nonunion, and displacement. In this study, we present a case of a patient with first metacarpal osteosarcoma who underwent tumor resection followed by reconstruction with a 3D\u2010printed metacarpal prosthesis. We tend to introduce a novel strategy to reconstruct the first metacarpal and restore the hand function.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>A 30\u2010year\u2010old male with 5\u2010month history of first metacarpal swelling in the left hand was admitted to our center. Imaging examinations and incision biopsy confirmed a diagnosis of intramedullary well\u2010differentiated osteosarcoma. A 3D\u2010printed metacarpal prosthesis was then designed to achieve carpometacarpal (CMC) joint fusion and thumb metacarpophalangeal (MCP) joint reconstruction. Postoperative evaluations included X\u2010ray and tomosynthesis\u2010shimadzu metal artifact reduction technology (T\u2010SMART) imaging to assess bone\u2010prosthesis integration. Hand function was measured using the Musculoskeletal Tumor Society (MSTS) score and the Disabilities of the Arm, Shoulder, and Hand (DASH) score.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The tumor was completely resected, and a 3D\u2010printed metacarpal prosthesis was performed to reconstruct the tumor defect. Postoperative imaging showed that the interface between bone and prosthesis was integrated and that there was no loose, displacement, or fracture of the implant. At the last follow\u2010up, the patient had an MSTS score of 25\/30 and a DASH score of 8\/100. The range of motion on thumb MCP joint was 30\u00b0 of flexion and 0\u00b0 of extension. The Kapandji thumb opposition score was 4 points. The grip strength was 9\u2009kg (compared to 30\u2009kg on the contralateral side) and the key\u2010pinch strength was 3\u2009kg (compared to 8\u2009kg on the contralateral side).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>3D\u2010printed metacarpal prosthesis could be an effective reconstruction option for patients with low\u2010grade malignant tumors. Themulti\u2010planar fixation achieved through 3D surgical planning helps maintain thumb function and restore overall hand function.<\/jats:p><\/jats:sec>","DOI":"10.1111\/os.14282","type":"journal-article","created":{"date-parts":[[2024,11,20]],"date-time":"2024-11-20T12:02:08Z","timestamp":1732104128000},"page":"278-287","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["<scp>3D<\/scp>\u2010Printed Metacarpal Prosthesis in the Treatment of Primary Osteosarcoma of the First Metacarpal: A Novel Surgical Technique"],"prefix":"10.1111","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1787-9704","authenticated-orcid":false,"given":"Xuanhong","family":"He","sequence":"first","affiliation":[{"name":"Department of Orthopedics, West China Hospital Orthopedic Research Institute, Sichuan University  Chengdu Sichuan China"},{"name":"Department of Model Worker and Innovative Craftsman, West China Hospital Sichuan 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