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The current surgical fixation options for such fractures include percutaneous Kirschner wire pinning and nonlocking and locking plate fixation. Although bone plate fixation, compared with Kirschner wire pinning, has superior fixation ability, a consensus has not been reached on whether the bone plate is better placed on the dorsal or lateral side.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Objective<\/jats:title>\n                <jats:p>The purpose of this study was to evaluate the fixation of locking and regular bone plates on the dorsal and lateral sides of a metacarpal shaft fracture.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Materials and methods<\/jats:title>\n                <jats:p>Thirty-five artificial metacarpal bones were used in the experiment. Metacarpal shaft fractures were created using a saw blade, which were then treated with four types of fixation as follows: (1) a locking plate with four locking bicortical screws on the dorsal side (LP_D); (2) a locking plate with four locking bicortical screws on the lateral side (LP_L); (3) a regular plate with four regular bicortical screws on the dorsal side (RP_D); (4) a regular plate with four regular bicortical screws on the lateral side (RP_D); and (5) two K-wires (KWs). All specimens were tested through cantilever bending tests on a material testing system. The maximum fracture force and stiffness of the five fixation types were determined based on the force\u2013displacement data. The maximum fracture force and stiffness of the specimens with metacarpal shaft fractures were first analyzed using one-way analysis of variance and Tukey\u2019s test.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>The maximum fracture force results of the five types of metacarpal shaft fracture were as follows: LP_D group (230.1 \u00b1 22.8 N, mean \u00b1 SD) \u2245 RP_D group (228.2 \u00b1 13.4 N) &gt; KW group (94.0 \u00b1 17.4 N) &gt; LP_L group (59.0 \u00b1 7.9 N) \u2245 RP_L group (44.5 \u00b1 3.4 N). In addition, the stiffness results of the five types of metacarpal shaft fracture were as follows: LP_D group (68.7 \u00b1 14.0 N\/mm) &gt; RP_D group (54.9 \u00b1 3.2 N\/mm) &gt; KW group (20.7 \u00b1 5.8 N\/mm) \u2245 LP_L group (10.6 \u00b1 1.7 N\/mm) \u2245 RP_L group (9.4 \u00b1 1.2 N\/mm).<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>According to our results<jats:bold>,<\/jats:bold> the mechanical strength offered by lateral plate fixation of a metacarpal shaft fracture is so low that even KW fixation can offer relatively superior mechanical strength; this is regardless of whether a locking or nonlocking plate is used for lateral plate fixation. Such fixation can reduce the probability of extensor tendon adhesion. Nevertheless, our results indicated that when lateral plate fixation is used for fixating a metacarpal shaft fracture in a clinical setting, whether the mechanical strength offered by such fixation would be strong enough to support bone union remains questionable.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s13018-021-02575-3","type":"journal-article","created":{"date-parts":[[2021,7,7]],"date-time":"2021-07-07T07:03:14Z","timestamp":1625641394000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":16,"title":["Bone plate fixation ability on the dorsal and lateral sides of a metacarpal shaft transverse fracture"],"prefix":"10.1186","volume":"16","author":[{"given":"Yung-Cheng","family":"Chiu","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cheng-En","family":"Hsu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tsung-Yu","family":"Ho","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yen-Nien","family":"Ting","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ming-Tzu","family":"Tsai","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5533-2059","authenticated-orcid":false,"given":"Jui-Ting","family":"Hsu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2021,7,7]]},"reference":[{"issue":"8","key":"2575_CR1","doi-asserted-by":"publisher","first-page":"e242","DOI":"10.1097\/BOT.0000000000000312","volume":"29","author":"JW Karl","year":"2015","unstructured":"Karl JW, Olson PR, Rosenwasser MP. 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