{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,4]],"date-time":"2026-10-04T03:16:46Z","timestamp":1791083806800,"version":"4.1.0"},"reference-count":36,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2021,5,28]],"date-time":"2021-05-28T00:00:00Z","timestamp":1622160000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JCM"],"abstract":"<jats:p>The Fitbone\u00ae motorized nail system has been used to correct limb length discrepancies (LLD) for several years. This study focuses on its application in posttraumatic limb lengthening surgery, its outcome and challenges. Materials and methods: A prospective, single center study was conducted between 2010 and 2019 in patients treated with motorized lengthening nails. The inclusion criteria were symptomatic LLD of 20 mm or more. An imaging analysis was done using TraumaCad\u00ae software (Brainlab AG, Munich, Germany) to compare frontal alignment angles and limb length discrepancy (LLD) on preoperative and latest follow-up radiographs of the lower limbs. Results: Thirty-four patients were included with a mean age of 28.8 \u00b1 9.7 years, a mean follow-up of 27.8 \u00b1 13 months and a mean hospital stay of 4.4 \u00b1 1.7 days. The mean LLD was 44 \u00b1 18 mm in 29 femoral and 32 \u00b1 8 mm in 4 tibial cases, which was reduced to less than 10 mm in 25\/34 (74%) patients. The mean healing index was 84.6 \u00b1 62.5 days\/cm for femurs and 92 \u00b1 38.6 days\/cm for tibias. The mean time to resume full weight-bearing without walking aids was 226 days \u00b1 133. There was no significant difference between preoperative and final follow-up alignment angles and range of motion. The mechanical lateral distal femoral angle (mLDFA) was corrected in the subgroup of 10 LLD patients with varus deformity of the femur (preoperative 95.7\u00b0 (\u00b15.0) vs. postoperative 91.5\u00b0 (\u00b13.4), p = 0.008). According to Paley\u2019s classification, there were 14 problems, 10 obstacles and 2 complications. Discussion: Six instances of locking screw pull out, often requiring reoperation, raise the question of whether a more systematic use of blocking screws that provide greater stability might be indicated. Lack of compliance can lead to poor outcomes, patient selection in posttraumatic LLD patients is therefore important. Conclusion: Limb lengthening with a motorized lengthening nail for posttraumatic LLD is a relatively safe and reliable procedure. Full patient compliance is crucial. In-depth knowledge of lengthening and deformity correction techniques is essential to prevent and manage complications.<\/jats:p>","DOI":"10.3390\/jcm10112393","type":"journal-article","created":{"date-parts":[[2021,5,28]],"date-time":"2021-05-28T11:33:20Z","timestamp":1622201600000},"page":"2393","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":18,"title":["Bone Lengthening with a Motorized Intramedullary Nail in 34 Patients with Posttraumatic Limb Length Discrepancies"],"prefix":"10.3390","volume":"10","author":[{"given":"Maxime","family":"Teuli\u00e8res","sequence":"first","affiliation":[{"name":"Department of Pediatric Orthopaedics, CHU de Toulouse, 31300 Toulouse, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1427-5518","authenticated-orcid":false,"given":"Tristan","family":"Langlais","sequence":"additional","affiliation":[{"name":"Department of Pediatric Orthopaedics, CHU de Toulouse, 31300 Toulouse, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J\u00e9r\u00f4me Sales","family":"de Gauzy","sequence":"additional","affiliation":[{"name":"Department of Pediatric Orthopaedics, CHU de Toulouse, 31300 Toulouse, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7934-2983","authenticated-orcid":false,"given":"Jan Duedal","family":"R\u00f6lfing","sequence":"additional","affiliation":[{"name":"Children\u2019s Orthopaedics and Reconstruction, Aarhus University Hospital, 8200 Aarhus, Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Franck","family":"Accadbled","sequence":"additional","affiliation":[{"name":"Department of Pediatric Orthopaedics, CHU de Toulouse, 31300 Toulouse, France"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,5,28]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"529","DOI":"10.2106\/00004623-198466040-00006","article-title":"Closed intramedullary nailing of femoral fractures. 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