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Left radii (n\u2009=\u200911) were fixed with a palmar plate plus HCS, while right radii (n\u2009=\u200911) received a radiopalmar double-plate construct. Construct stiffness and axial displacement were assessed using a universal testing machine. Interfragmentary range of motion (ROM) and rotation (ROT) were quantified using an optical three-dimensional motion-tracking system. Measurements were obtained before and after 5000 cycles of dynamic axial loading at 150 N. Two specimen pairs were excluded due to early failure or incomplete data acquisition.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Both constructs demonstrated comparable stiffness and axial displacement, with no implant loosening or hardware failure observed. Interfragmentary ROM did not differ significantly between groups. However, the plate\u2013HCS construct showed greater variability in rotational parameters. Initial radial-shaft rotation was significantly greater in the plate\u2013HCS group (1.14\u00b0 vs. 0.51\u00b0, p\u2009=\u20090.02). After cyclic loading, ulnar-shaft rotation increased significantly in the plate\u2013HCS group (0.97\u00b0 to 1.16\u00b0, p\u2009=\u20090.02) but not in the double-plate group.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>In this cadaveric model, fixation with a palmar plate combined with an HCS provided comparable axial stability but demonstrated greater variability and less consistent rotational control compared with radiopalmar double plating. Clinical studies are required to determine whether this less invasive construct achieves equivalent outcomes in vivo.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1007\/s00402-026-06279-3","type":"journal-article","created":{"date-parts":[[2026,4,6]],"date-time":"2026-04-06T12:00:25Z","timestamp":1775476825000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Biomechanical comparison of palmar plate plus headless compression screw versus radiopalmar double plating in AO\/OTA 23-C2.1 distal radius fractures"],"prefix":"10.1007","volume":"146","author":[{"given":"Patrick","family":"Riegner","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christian","family":"Spiegel","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Felix Christian","family":"Kohler","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Heike","family":"Kielstein","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ivan","family":"Zderic","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Boyko","family":"Gueorguiev-R\u00fcegg","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mark","family":"Lenz","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wolfram","family":"Weschenfelder","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,4,6]]},"reference":[{"key":"6279_CR1","first-page":"665","volume":"118","author":"M Rupp","year":"2021","unstructured":"Rupp M, Walter N, Pfeifer C et al (2021) The incidence of fractures among the adult population of Germany. 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