{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,4]],"date-time":"2026-05-04T07:44:10Z","timestamp":1777880650645,"version":"3.51.4"},"reference-count":18,"publisher":"SAGE Publications","issue":"1","license":[{"start":{"date-parts":[[2012,4,1]],"date-time":"2012-04-01T00:00:00Z","timestamp":1333238400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["J Orthop Surg (Hong Kong)"],"published-print":{"date-parts":[[2012,4]]},"abstract":"<jats:sec>\n                    <jats:title>Purpose.<\/jats:title>\n                    <jats:p>To compare the treatment outcome of Acutrak versus Herbert screw fixation for scaphoid non-union and delayed union.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods.<\/jats:title>\n                    <jats:p>Records of 132 patients who underwent Herbert screw fixation (n=61) or Acutrak screw fixation (n=71) with or without bone grafting for scaphoid non-union and delayed union by a single surgeon were reviewed. The most common fracture site was the waist of the scaphoid (n=95), followed by the proximal pole (n=31) and the distal pole (n=6). Screw placement was considered accurate (n=120) when the screw was placed in the central one-third (axially) of the scaphoid; otherwise it was eccentric (n=12). Bone union was assessed radiographically and clinically. Functional outcome was assessed using the modified Mayo wrist score.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results.<\/jats:title>\n                    <jats:p>Respectively in the Herbert and Acutrak screw groups, the mean patient ages were 25.3 and 27.3 years (p=0.28), the mean intervals between injury and screw fixation were 12.2 and 17 months (p=0.38), the mean durations to bone union were 2.1 and 1.8 months (p=0.63), and the union rates were 77% and 93% (p=0.01). The union rate was significantly higher in fractures of the waist of the scaphoid than in the proximal and distal poles (94% vs. 71% vs. 33%, p=0.001). The union rate was significantly higher when the screw was placed accurately (axially) than eccentrically (Herbert screw: 84% vs. 40%, p=0.006; Acutrak screw: 96% vs. 0%, p=0.004). 84% of the Herbert screws were placed axially, compared to 97% for the Acutrak screws. Respectively, 67% and 85% of patients had satisfactory functional outcomes (p=0.03), whereas 23% and 7% of the patients had persistent non-union (p=0.05).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion.<\/jats:title>\n                    <jats:p>The Acutrak screw enabled more accurate screw placement and achieved higher union rates and modified Mayo wrist scores than the Herbert screw did.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/230949901202000112","type":"journal-article","created":{"date-parts":[[2016,10,4]],"date-time":"2016-10-04T17:13:55Z","timestamp":1475601235000},"page":"61-65","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":17,"title":["Acutrak versus Herbert Screw Fixation for Scaphoid Non-Union and Delayed Union"],"prefix":"10.1177","volume":"20","author":[{"given":"Kayode O","family":"Oduwole","sequence":"first","affiliation":[{"name":"Departments of Orthopaedic Surgery, Waterford Regional Hospital, Waterford, Ireland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Benedikt","family":"Cichy","sequence":"additional","affiliation":[{"name":"Departments of Orthopaedic Surgery, Waterford Regional Hospital, Waterford, Ireland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"John P","family":"Dillon","sequence":"additional","affiliation":[{"name":"Departments of Orthopaedic Surgery, Waterford Regional Hospital, Waterford, Ireland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Joan","family":"Wilson","sequence":"additional","affiliation":[{"name":"Department of Occupation Therapy, Waterford Regional Hospital, Waterford, Ireland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"John","family":"O'Beirne","sequence":"additional","affiliation":[{"name":"Departments of Orthopaedic Surgery, Waterford Regional Hospital, Waterford, Ireland"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2012,4,1]]},"reference":[{"key":"bibr1-230949901202000112","doi-asserted-by":"publisher","DOI":"10.1016\/0020-1383(94)90178-3"},{"key":"bibr2-230949901202000112","doi-asserted-by":"publisher","DOI":"10.1302\/0301-620X.66B1.6693468"},{"key":"bibr3-230949901202000112","doi-asserted-by":"publisher","DOI":"10.1016\/J.JHSB.2005.10.015"},{"key":"bibr4-230949901202000112","doi-asserted-by":"publisher","DOI":"10.1016\/S0021-9290(99)00076-7"},{"key":"bibr5-230949901202000112","doi-asserted-by":"publisher","DOI":"10.2106\/00004623-199708000-00011"},{"key":"bibr6-230949901202000112","doi-asserted-by":"publisher","DOI":"10.1016\/S0363-5023(10)80059-0"},{"key":"bibr7-230949901202000112","doi-asserted-by":"publisher","DOI":"10.1097\/00003086-198006000-00010"},{"key":"bibr8-230949901202000112","doi-asserted-by":"publisher","DOI":"10.1016\/0363-5023(89)90191-3"},{"key":"bibr9-230949901202000112","doi-asserted-by":"publisher","DOI":"10.2106\/00004623-199612000-00005"},{"key":"bibr10-230949901202000112","doi-asserted-by":"publisher","DOI":"10.1016\/0363-5023(88)90267-5"},{"key":"bibr11-230949901202000112","first-page":"761","volume":"74","author":"Gregory 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