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The standard surgical approach for superior pubic ramus fractures (SPRF) is a minimally invasive percutaneous screw fixation. However, percutaneous closed reduction and internal fixation of anterior pelvic ring injuries have high failure rates of up to 15%. The aim of this biomechanical study was to evaluate the stability of SPRF following stabilization with retrograde placed cannulated compression headless screw (CCHS) versus conventional fully and partially threaded screws in an artificial pelvic bone model.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Methods<\/jats:title>\n                <jats:p>SPRF type II as described by Nakatani et al. was created by means of osteotomies in eighteen anatomical composite hemi-pelvises. Specimens were stratified into three groups of six specimens each (<jats:italic>n<\/jats:italic>\u2009=\u20096) for fixation with either a 7.3\u00a0mm partially threaded cannulated screw (group RST), a 7.3\u00a0mm fully threaded cannulated screw (group RSV), or a 7.5\u00a0mm partially threaded cannulated CCHS (group CCS). Each hemi-pelvic specimen was tested in an inverted upright standing position under progressively increasing cyclic axial loading. The peak load, starting at 200\u00a0N, was monotonically increased at a rate of 0.1\u00a0N\/cycle until 10\u00a0mm actuator displacement.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>Total and torsional displacement were associated with higher values for RST versus CCS and RSV, with significant differences between RST and CCS for both these parameters (<jats:italic>p<\/jats:italic>\u2009\u2264\u20090.033). The differences between RST and RSV were significant for total displacement (<jats:italic>p<\/jats:italic>\u2009=\u20090.020), and a trend toward significance for torsional displacement (<jats:italic>p<\/jats:italic>\u2009=\u20090.061) was observed. For both failure criteria 2\u00a0mm total displacement and 5\u00b0 torsional displacement, CCS was associated with significantly higher number of cycles compared to RST (<jats:italic>p<\/jats:italic>\u2009\u2264\u20090.040).<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>CCHS fixation presented predominantly superior stability to the standard surgical treatment and could therefore be a possible alternative implant for retrograde SPRF screw fixation, whereas partially threaded screws in group RST were associated with inferior biomechanical stability.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1007\/s00264-023-05710-3","type":"journal-article","created":{"date-parts":[[2023,2,7]],"date-time":"2023-02-07T09:24:07Z","timestamp":1675761847000},"page":"1079-1087","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Evaluation of cannulated compression headless screws as an alternative implant for superior pubic ramus fracture fixation: a biomechanical study"],"prefix":"10.1007","volume":"47","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9582-1810","authenticated-orcid":false,"given":"Till","family":"Berk","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ivan","family":"Zderic","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Peter","family":"Schwarzenberg","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tatjana","family":"Pastor","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Felix","family":"Lesche","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sascha","family":"Halvachizadeh","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"R. 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