{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,18]],"date-time":"2026-06-18T16:55:51Z","timestamp":1781801751156,"version":"3.54.5"},"reference-count":29,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2023,1,16]],"date-time":"2023-01-16T00:00:00Z","timestamp":1673827200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["31471146"],"award-info":[{"award-number":["31471146"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["81271663"],"award-info":[{"award-number":["81271663"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Orthopaedic Surgery"],"published-print":{"date-parts":[[2023,4]]},"abstract":"<jats:sec><jats:title>Objective<\/jats:title><jats:p>At present, it is still uncertain whether single screw has the same stability as double screws in the treatment of ulnar coronal process basal fracture (Regan\u2013Morry type III). So, we aimed to compare the pull\u2010out force and anti\u2010rotation torque of anterior single\/double screw\u2010cancellous bone fixation (aSSBF, aDSBF) in this fracture, and further study the influencing factors on anatomical and biomechanical stability of smart screw internal fixations.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>A total of 63 adult volunteers with no history of elbow injury underwent elbow CT scanning with associated three\u2010dimensional reconstruction that enabled the measurements of bone density and fixed length of the proximal ulna and coronoid. The models of coronal process basal fracture, aSSBF and aDSBF, were developed and validated. Using the finite element model test, the sensitivity analysis of pull\u2010out force and rotational torque was carried out.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The pull\u2010out force of aSSBF model was positively correlated with the density of the cancellous bone and linearly related to the fixed depth of the screw. The load pattern of pull\u2010out force of aDSBF model was similar to that of aSSBF model. The ultimate torque of aDSBF model was higher than that of aSSBF model, but the load pattern of ultimate torque of both models was similar to each other when the fracture reset was satisfactory, and the screw nut attaches closely to coronoid process. Moreover, with enhancement of initial pre\u2010tightening force, the increase of ultimate torque of both models was small.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>In addition to three pull\u2010out stability factors of smart screw fixations, fracture surface fitting degree and nut fitting degree are the other two important anatomical and biomechanical stability factors of smart screw fixations both for rotational stability. When all pull\u2010out stability and rotational stability factors meet reasonable conditions simultaneously, single or double screw fixation methods are stable for the treatments of ulnar coronoid basal fractures.<\/jats:p><\/jats:sec>","DOI":"10.1111\/os.13664","type":"journal-article","created":{"date-parts":[[2023,1,17]],"date-time":"2023-01-17T05:48:34Z","timestamp":1673934514000},"page":"1072-1084","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Anatomical and Biomechanical Stability of Single\/Double Screw\u2010Cancellous Bone Fixations of <scp>Regan\u2013Morry<\/scp> Type <scp>III<\/scp> Ulnar Coronoid Fractures in Adults: <scp>CT<\/scp> Measurement and Finite Element Analysis"],"prefix":"10.1111","volume":"15","author":[{"given":"Hao","family":"Ye","sequence":"first","affiliation":[{"name":"Institute of Digitized Medicine and Intelligent Technology Wenzhou Medical University  Wenzhou 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