{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,30]],"date-time":"2026-06-30T08:44:24Z","timestamp":1782809064128,"version":"3.54.5"},"reference-count":13,"publisher":"MJS Publishing, Medical Journals Sweden AB","license":[{"start":{"date-parts":[[2026,6,30]],"date-time":"2026-06-30T00:00:00Z","timestamp":1782777600000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JPHS"],"abstract":"<jats:p>This study presents a wedge osteotomy technique for correcting metacarpal adduction in the treatment of Wassel types V and VI thumb polydactyly, evaluating its clinical efficacy and reporting intraoperative anatomical abnormalities. A retrospective analysis of 37 thumbs treated between January 2016 and June 2023 was performed. Preoperatively, the median inter-metacarpal angle (IMA) was 0\u00b0, and the median radial deviation angle of the metacarpophalangeal (MCP) joint of the ulnar thumb was 30\u00b0. All cases underwent excision of the hypoplastic radial thumb, thenar muscle relocation, and a radial closing wedge osteotomy at the base of the ulnar thumb metacarpal to achieve a corrected IMA exceeding 40\u00b0. The ulnar capsule and collateral ligament were reinforced, and one or two Z-plasties were performed to enlarge the first web space in most cases. Mean follow-up was 51.4 months (range, 12\u2013120). Postoperative IMA and MCP joint angle improved significantly to a median of 40\u00b0 (IQR: 35\u201342\u00b0) and 0\u00b0 (IQR: 0\u201310\u00b0),respectively. Mean range of motion at the MCP and interphalangeal joints was 40\u00b0 (IQR: 30\u201345\u00b0) and 60\u00b0 (IQR: 45\u201375\u00b0). According to the modified Tada score, 31 thumbs were rated good, 5 fair, and 1 poor. In conclusion, wedge osteotomy to correct metacarpal adduction deformity in type V\/VI thumb duplication yields encouraging results, with good functional outcomes and a low reoperation rate.<\/jats:p>","DOI":"10.2340\/jphs.v61.46296","type":"journal-article","created":{"date-parts":[[2026,6,30]],"date-time":"2026-06-30T07:54:05Z","timestamp":1782806045000},"page":"169-173","source":"Crossref","is-referenced-by-count":0,"title":["Wedging osteotomy to correct metacarpal adduction for the treatment of Wassel types V and VI duplicated thumb: surgical strategy, outcomes, and anatomical findings"],"prefix":"10.2340","volume":"61","author":[{"given":"Zhixin","family":"Wang","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guoqing","family":"Chen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaofei","family":"Tian","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1183","published-online":{"date-parts":[[2026,6,30]]},"reference":[{"key":"160971","unstructured":"Wassel HD. The results of surgery for polydactyly of the thumb. A review. Clin Orthop Relat Res. 1969;64:175\u2013193."},{"key":"160972","doi-asserted-by":"crossref","unstructured":"Saito S, Tsuge I, Yamanaka H, et al. Soft tissue abnormalities in Wassel type VI radial polydactyly: a detailed anatomical study. J Hand Surg Eur Vol. 2021;46:352\u2013359.","DOI":"10.1177\/1753193421990212"},{"key":"160973","doi-asserted-by":"crossref","unstructured":"Van Wyhe RD, Trost JG, Koshy JC, et al. The duplicated thumb: a review. Semin Plast Surg. 2016;30:181\u2013188.","DOI":"10.1055\/s-0036-1593736"},{"key":"160974","doi-asserted-by":"crossref","unstructured":"Saito S, Ueda M, Murata M, et al. Thenar dysplasia in radial polydactyly depends on the level of bifurcation. Plast Reconstr Surg. 2018;141:85e\u201390e.","DOI":"10.1097\/PRS.0000000000003937"},{"key":"160975","doi-asserted-by":"crossref","unstructured":"Kareh AM, Firouzbakht PK, Rowe AG, et al. Detailed anatomy and reconstructive approach of a Wassel VI thumb duplication. Plast Reconstr Surg Glob Open. 2022;10:e4009.","DOI":"10.1097\/GOX.0000000000004009"},{"key":"160976","doi-asserted-by":"crossref","unstructured":"Du M, Jiang L, Wang A, et al. MR imaging provides practical information for preoperative assessment of radial polydactyly with bifurcation at the metacarpophalangeal joint level. Int J Gen Med. 2022;15:2163\u20132169.","DOI":"10.2147\/IJGM.S352501"},{"key":"160977","doi-asserted-by":"crossref","unstructured":"Bessho Y, Takagi T, Seki A, et al. Treatment for Wassel types V and VI thumb polydactyly. J Hand Surg Asian Pac Vol. 2020;25:153\u2013157.","DOI":"10.1142\/S2424835520500162"},{"key":"160978","doi-asserted-by":"crossref","unstructured":"Monjardino MP, Carvalho M, Cardoso PS, et al. Thumb duplication surgical treatment: outcomes and results. 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J Hand Surg Eur Vol. 2023;48:341\u2013345.","DOI":"10.1177\/17531934221133509"}],"container-title":["Journal of Plastic Surgery and Hand Surgery"],"original-title":[],"link":[{"URL":"https:\/\/medicaljournalssweden.se\/JPHS\/article\/download\/46296\/54598","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/medicaljournalssweden.se\/JPHS\/article\/download\/46296\/54598","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,6,30]],"date-time":"2026-06-30T07:54:37Z","timestamp":1782806077000},"score":1,"resource":{"primary":{"URL":"https:\/\/medicaljournalssweden.se\/JPHS\/article\/view\/46296"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,6,30]]},"references-count":13,"URL":"https:\/\/doi.org\/10.2340\/jphs.v61.46296","relation":{},"ISSN":["2000-6764"],"issn-type":[{"value":"2000-6764","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,6,30]]}}}