In patients who undergo femoral fracture fixation with a cephalomedullary nail, the breakage of one or more of the distal interlocking screws is a well-described phenomenon. The presence of a broken interlocking screw in patients who require the removal of their cephalomedullary nail presents a unique challenge. The broken interlocking screw may be retrieved, or the screw may be retained if it is not engaged within the nail and the nail can safely be removed while leaving the broken screw fragment behind. We report a hip conversion arthroplasty case with a broken interlocking screw where the nail was removed with ease and the broken screw was assumed to have been left behind. Cerclage wires were placed for an apparent proximal femoral fracture. Postoperative X-rays demonstrated a large lucency tracking from the prior location of the distal interlocking screw to the calcar region. This finding made it evident that the broken screw had been retained in the nail and was dragged up the femur upon nail removal, causing a large gouge spanning the entire femur.
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http://dx.doi.org/10.7759/cureus.37075 | DOI Listing |
Zhongguo Gu Shang
December 2024
Department of Orthopaedics, Jiangyan Hospital of Traditional Chinese Medicine, Taizhou 225599, Jiangsu, China.
Objective: To explore changes of humerus torque screw tip distance on stability of proximal humeral internal locking system (PHILOS) by finite element analysis, in order to provide reference for selection of intraoperative plant size.
Methods: The proximal humerus 3D model was constructed based on Synbone artificial bone model in 3D engineering drawing software, and the corresponding 3D model was constructed based on PHILOS bone plate contour. The model was modified to simulate comminuted proximal humerus fracture, and the operation model was simulated after fracture, and the fixed operation model was assembled, the apex distance of humerus moment screw was set as 4, 8, 12 and 16 mm respectively.
Kurume Med J
November 2024
Department of Orthopaedic Surgery, Saiseikai Fukuoka General Hospital.
Background: The purpose of this study was to investigate the effect of the main fragment fracture type (oblique or transverse) on the union rate of femoral shaft fractures.
Methods: Patients who underwent surgical treatment with an antegrade intramedullary nail for femoral shaft fracture (Arbeitsgemeinschaft für Osteosynthesefragen / Orthopaedic Trauma Association; AO/OTA type 32 type B or C) between January 2009 and March 2021 were included in this study. Patients with oblique fractures of the two main fragments on radiographs immediately after surgery were classified into the oblique fracture group.
J Am Acad Orthop Surg
November 2024
From the Department of Orthopaedics, Denver Health Medical Center; University of Colorado School of Medicine, Denver, CO.
Introduction: Symptomatic interlocking screws are common after intramedullary nail fixation of tibia fractures. Low-profile headless interlocking screws recently became available and could potentially reduce the rate of symptomatic screws. The purpose of this study was to compare the rate of symptomatic screws and screw removals between these screw types.
View Article and Find Full Text PDFActa Chir Orthop Traumatol Cech
November 2024
Department of Orthopaedics and Traumatology, Istanbul University Istanbul Faculty of Medicine, Istanbul, Turkey.
Purpose Of The Study: Intertrochanteric hip fractures in elderly patients are a significant cause of morbidity and mortality, with increasing incidence due to the aging population. Despite advancements in intramedullary nailing (IMN) technology, fixation failure remains a concern. This study aims to evaluate pre-and postoperative radiographic risk factors for varus collapse in geriatric intertrochanteric fractures treated with twin interlocking derotation and compression screw cephalomedullary nail (InterTAN, Smith & Nephew).
View Article and Find Full Text PDFJ Orthop Sci
October 2024
Department of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan.
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