{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,1]],"date-time":"2026-09-01T00:52:21Z","timestamp":1788223941219,"version":"build-2803163510"},"reference-count":15,"publisher":"SAGE Publications","issue":"6","license":[{"start":{"date-parts":[[2012,6,1]],"date-time":"2012-06-01T00:00:00Z","timestamp":1338508800000},"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":["Foot Ankle Int."],"published-print":{"date-parts":[[2012,6]]},"abstract":"<jats:p> Background: When performing subtalar arthrodesis, proper screw placement is fundamental to provide primary stability and to help ensure bone healing. In inexperienced hands this step can be time-consuming and exposes surgeons and patients to radiation. By means of a targeting device these potential drawbacks and dangers could be reduced. It was hypothesized that a specifically designed targeting device would reduce radiation exposure while improving screw placement when compared with the conventional \u201cfree-hand\u201d method. Methods: Twenty matched-pairs of cadaveric hindfoot specimens (Thiel fixation) were prepared for the purpose of the study. The specimens were randomly assigned into two groups consisting of 10 specimens each: in Group 1 screw placement was performed with the targeting device and in Group 2 screw placement was performed under fluoroscopic control. Screw placement was radiographically judged to be optimal, suboptimal and poor. An experienced, fellowship-trained foot and ankle surgeon and a resident, who had never done subtalar fusions performed the screw placements. Exposure to radiation was assessed by means of the dose area product given by the fluoroscope. Results: Optimal screw positioning was achieved in both groups in ten out of 20 specimens (Group 1, n = 5; Group 2, n = 5). Suboptimal screw placement was found in eight cases (Group 1, n = 4; Group 2, n = 4). There were two failures which occurred in fusions performed by the resident (Group 1, n = 1; Group 2, n = 1). Exposure to radiation was significantly reduced in Group 1 when compared with Group 2 (4.1cGy\u2217cm<jats:sup> 2 <\/jats:sup> versus 8.1cGy\u2217cm<jats:sup> 2 <\/jats:sup>; p = 0.012). No lesion of neurovascular structures due to aiming device placement occurred in Group 1. Conclusion: A target-device for screw-placement did not provide a significant technical advantage but did result in less radiation exposure. <\/jats:p><jats:p> Level of Evidence: IV, Retrospective Case Series <\/jats:p>","DOI":"10.3113\/fai.2012.0519","type":"journal-article","created":{"date-parts":[[2012,7,26]],"date-time":"2012-07-26T17:34:40Z","timestamp":1343324080000},"page":"519-523","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":5,"title":["Precision of Targeting Device for Subtalar Screw Placement"],"prefix":"10.1177","volume":"33","author":[{"given":"Michael","family":"Betz","sequence":"first","affiliation":[{"name":"Zurich, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Karl","family":"Wieser","sequence":"additional","affiliation":[{"name":"Zurich, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Magdalena","family":"Vich","sequence":"additional","affiliation":[{"name":"Zurich, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stephan Hermann","family":"Wirth","sequence":"additional","affiliation":[{"name":"Zurich, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Norman","family":"Espinosa","sequence":"additional","affiliation":[{"name":"Zurich, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2012,6,1]]},"reference":[{"key":"bibr1-FAI.2012.0519","doi-asserted-by":"publisher","DOI":"10.3113\/FAI-2009-0133"},{"key":"bibr2-FAI.2012.0519","doi-asserted-by":"publisher","DOI":"10.3113\/FAI.2007.0295"},{"key":"bibr3-FAI.2012.0519","doi-asserted-by":"publisher","DOI":"10.2106\/00004623-200005000-00002"},{"key":"bibr4-FAI.2012.0519","doi-asserted-by":"publisher","DOI":"10.2106\/JBJS.G.00513"},{"key":"bibr5-FAI.2012.0519","doi-asserted-by":"publisher","DOI":"10.1177\/107110079501600415"},{"key":"bibr6-FAI.2012.0519","doi-asserted-by":"publisher","DOI":"10.1177\/107110070402501103"},{"key":"bibr7-FAI.2012.0519","doi-asserted-by":"publisher","DOI":"10.1177\/107110079801900802"},{"key":"bibr8-FAI.2012.0519","doi-asserted-by":"publisher","DOI":"10.2106\/00004623-198365010-00001"},{"key":"bibr9-FAI.2012.0519","first-page":"1990","volume":"60","author":"International Commission on Radiological Protection","year":"1991","journal-title":"Publication"},{"key":"bibr10-FAI.2012.0519","doi-asserted-by":"publisher","DOI":"10.3113\/FAI.2008.1235"},{"key":"bibr11-FAI.2012.0519","doi-asserted-by":"publisher","DOI":"10.2106\/00004623-199406000-00023"},{"key":"bibr12-FAI.2012.0519","doi-asserted-by":"publisher","DOI":"10.1053\/j.jfas.2010.02.017"},{"key":"bibr13-FAI.2012.0519","doi-asserted-by":"publisher","DOI":"10.1302\/0301-620X.89B8.19529"},{"key":"bibr14-FAI.2012.0519","doi-asserted-by":"publisher","DOI":"10.1016\/S0940-9602(11)80346-8"},{"key":"bibr15-FAI.2012.0519","first-page":"471","volume":"54","author":"Warren K","year":"1981","journal-title":"Yale J Biol Med"}],"container-title":["Foot &amp; Ankle International"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.3113\/FAI.2012.0519","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/full-xml\/10.3113\/FAI.2012.0519","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.3113\/FAI.2012.0519","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,3,10]],"date-time":"2025-03-10T15:41:52Z","timestamp":1741621312000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.sagepub.com\/doi\/10.3113\/FAI.2012.0519"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2012,6]]},"references-count":15,"journal-issue":{"issue":"6","published-print":{"date-parts":[[2012,6]]}},"alternative-id":["10.3113\/FAI.2012.0519"],"URL":"https:\/\/doi.org\/10.3113\/fai.2012.0519","relation":{},"ISSN":["1071-1007","1944-7876"],"issn-type":[{"value":"1071-1007","type":"print"},{"value":"1944-7876","type":"electronic"}],"subject":[],"published":{"date-parts":[[2012,6]]}}}