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Cannulated screw

Mahmood Ali Arbash, Ashik Mohsin Parambathkandi, Abdul Moeen Baco, Abduljabbar Alhammoud
Study Design: Retrospective review. Purpose: To detect the effect of cannulated (poly-axial head) and solid (mono-axial head) screws on the local kyphotic angle, vertebral body height, and superior and inferior angles between the screw and the rod in the surgical management of thoracolumbar fractures. Overview of Literature: Biomechanics studies showed that the ultimate load, yield strength, and cycles to failure were significantly lower with cannulated (poly-axial head) pedicle comparing to solid core (mono-axial head)...
October 16, 2018: Asian Spine Journal
Canbin Wang, Han Liu, Xuezhi Lin, Jiahui Chen, Tao Li, Qiguang Mai, Shicai Fan
BACKGROUND This study aimed to evaluate outcome following a single lateral rectus abdominis surgical approach for complicated acetabular fractures, involving anterior and posterior columns. MATERIAL AND METHODS From January 2012 to March 2016, 59 patients, including 36 anterior column hemitransverse fractures, 18 two-column fractures, and five T-type complicated acetabular fractures, were treated with a single lateral rectus abdominis approach and fixed by plates and cannulated lag screws. Anterior column fractures were fixed with 3...
October 12, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
Werner Schmoelz, Alexander Keiler, Marko Konschake, Richard A Lindtner, Alessandro Gasbarrini
BACKGROUND: Pedicle screws can be augmented with polymethylmethacrylate (PMMA) cement through cannulated and fenestrated pedicle screws to improve screw anchorage. To overcome the drawbacks of PMMA, a modified augmentation technique applying a self-curing elastomeric material into a balloon-created cavity prior to screw insertion was developed and evaluated. The aim of the study was to compare the effect of the established and novel augmentation technique on pedicle screw anchorage in a biomechanical in vitro experiment...
October 11, 2018: Journal of Orthopaedic Surgery and Research
Zeke J Walton, Robert E Holmes, Shane K Woolf
Os acromiale is a failure of fusion between 1 or more ossification centers of the scapula and the acromion process. Pain can be caused by motion and impingement of the unfused segment. Several methods for the management of os acromiale have been described. Internal fixation is the most common surgical technique, followed by excision and acromioplasty. We present a novel technique for treatment of symptomatic os acromiale using arthroscopically-guided headless compression screws. This is a viable technique in the management of symptomatic os acromiale due to preservation of the periosteal blood supply and less concern for symptomatic hardware...
September 2018: American Journal of Orthopedics
Helen M A Ingoe, Jonathan F O'Hare, Alan Middleton
BACKGROUND: Arthrodesis of the distal interphalangeal (DIP) joint reliably improves symptomatic arthritis. A range of successful surgical techniques including tension band wiring, plate fixation and headless compression screws have been described and produce stable painless unions. For best functional outcome, the fusion angle should be between 10 and 61 degrees. In the past, it has been difficult to achieve more than 10 degrees of flexion with a headless compression screw. Higher fusion angles have been reported using tension band wiring techniques...
September 2018: Journal of Hand Surgery Asian-Pacific Volume
Xiaojun Duan, Peng He, Huaquan Fan, Chengchang Zhang, Fuyou Wang, Liu Yang
Objective: To accurately drill the Kirschner wire with the help of the 3D-printed personalized guide and to evaluate the feasibility of the 3D technology as well as the outcome of the surgery. Methods: Patients' DICM data of ankle via CT examinations were introduced into the MIMICS software to design the personalized guides. Two 2mm Kirschner wires were drilled with the help of the guides; the C-arm fluoroscopy was used to confirm the position of the wires before applying the cannulated screws...
2018: BioMed Research International
Achmad Fauzi Kamal, Damiarta Simorangkir, Ihsan Oesman
Introduction: In most cases, osteosarcoma occurs in the metaphysis of long bones such as femur, tibia, or humerus. Meanwhile, osteosarcoma of the talus is extremely rare. Presentation of case: We presented a case of a thirty-eight-year-old male patient with osteosarcoma of the talus treatedwith limb salvage surgery. That procedure consists of wide excision as extra-articular resection" totaltalectomy" followed by challenging reconstruction of the defect using fibular graft and followed by internal fixation and arthrodesis...
November 2018: Annals of Medicine and Surgery
Hsieng-Ming Huang, Chao-Hsuan Chen, Han-Chung Lee, Hao-Yu Chuang, Der-Cherng Chen, Yen-Tse Chu, Der-Yang Cho
Midline lumbar inter-body fusion (MIDLF) surgery with cortical bone trajectory (CBT) screw insertion is a modern fusion technique for spinal surgery. The difference in entry point of this trajectory from conventional pedicle screw surgery offers the potential benefits of less soft tissue dissection and reduced blood loss, post-operative wound pain, and infection risks. Because this is a newly developed technique first announced by Santoni in 2009, most surgeons perform this surgery in a mini-open fashion and require more intra-operative fluoroscopy and ionizing radiation exposure during screw placement...
September 2018: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
Gordon L Bennett, Derek Klaus, Scott Shemory, James A Sabetta
BACKGROUND: Distal chevron metatarsal osteotomy bunionectomy is a commonly performed procedure for the treatment of mild to moderate hallux valgus. We continue to use the intraosseous sliding osteotomy plate system for fixation of the distal metatarsal osteotomy. With the addition of the Akin osteotomy, we are able to obtain reliable, reproducible correction with better cosmesis and increased patient satisfaction for more advanced deformities. METHODS: We prospectively evaluated 138 (145 feet) consecutive patients who underwent double osteotomy bunionectomy using the intramedullary plate system and 3...
September 23, 2018: Foot & Ankle International
Graham T Fedorak, Amy K Brough, Robin H Miyamoto, Ellen M Raney
The Maori of New Zealand have been identified as a high-risk population for slipped capital femoral epiphysis (SCFE). This study assessed whether the burden of disease from SCFE in the American Territory of American Samoa is similar to that identified in the Maori. This was a retrospective review of children from American Samoa treated for SCFE at a tertiary care pediatric hospital between 2005-2014. Demographic, clinical, and radiographic information was collected. All patients were followed for at least one year after surgery and prophylactically pinned hips were not included...
September 2018: Hawai'i Journal of Medicine & Public Health: a Journal of Asia Pacific Medicine & Public Health
Karel Frydrýšek, Milan Šír, Leopold Pleva
This article represents a multidisciplinary approach to biomechanics (engineering + medicine) in the field of "collum femoris" fractures. One possible treatment method for femoral neck fractures, especially for young people, is the application of cancellous (i.e. lag or femoral) screws (with full or cannulated cross-section) made of Ti6Al4V or stainless steel. This paper therefore aims to offer our own numerical model of cancellous screws together with an assessment of them. The new, simple numerical model presented here is derived together with inputs and boundary conditions and is characterized by rapid solution...
2018: Journal of Medical and Biological Engineering
Shih-Chieh Yang, Pao-Hsin Liu, Yuan-Kun Tu
PURPOSE: The conventional screw is unable to provide enough screw-bone interface strength for osteoporotic cencellous bone, and complications resulting from loosening or failure of the implants remain a significant clinical problem. Hence, the purpose of this study is to investigate pullout strength and energy in three types of the pedicle screws, including conventional solid pedicle screw, cannulated pedicle screw, and cannulated pedicle screw with a central pin, using osteoporotic sawbone test block with different bone cement volumes through pullout force testing...
2018: Acta of Bioengineering and Biomechanics
Matthew D Riedel, Patrick K Cronin, Philip B Kaiser, John Y Kwon
BACKGROUND: Removal of previously placed orthopaedic implants is a commonly performed procedure worldwide. Given the diversity of orthopaedic implant manufacturers, surgeons may be uncertain whether they have the appropriate screwdriver on site. The purpose of this study was to assess the compatibility of screw head and size configurations from various orthopaedic manufacturers with two commonly used universal screw removal sets. METHODS: Inclusion of orthopaedic implant manufacturers was determined by market share based on industry-monitoring financial firms...
September 10, 2018: Journal of the American Academy of Orthopaedic Surgeons
B Heimkes, F Schmidutz, J Rösner, V Frimberger, P Weber
OBJECTIVE: The dysplastic acetabulum is shifted three-dimensionally outwards and forwards. INDICATIONS: Symptomatic residual hip dysplasias and hip subluxations in skeletally mature patients up to the age of 50 years. Sharp's acetabular up to 60°, as an exception above 60°. CONTRAINDICATIONS: Acetabular retroversion. Radiographic joint space at the lateral acetabular edge that is less than half the normal thickness for the patient's age...
September 7, 2018: Operative Orthopädie und Traumatologie
Yinwang Zhang, Zhen Xu, Wuxue Zhong, Fuhai Liu, Jie Tang
BACKGROUND: To compare the efficacy and safety of K-wire tension band fixation (KTB) with other alternative approaches (cannulated screws, cable pin, and ring pin) for treatment of patella fractures by performing a meta-analysis. METHODS: PubMed and EMBASE databases were searched for all relevant studies. Standardized mean difference (SMD) or relative risk (RR) and their corresponding 95% confidence intervals (CIs) were calculated for continuous or dichotomous outcomes via either a fixed- or random-effect model using Stata 13...
September 5, 2018: Journal of Orthopaedic Surgery and Research
Baver Acar, Ozkan Kose, Yusuf Alper Kati, Omer Faruk Egerci, Adil Turan, Halil Yalcın Yuksel
PURPOSE: Scaphoid waist fractures may be fixed through volar or dorsal screw fixation. However, there is no consensus on which surgical fixation method should be performed. The purpose of this study was to compare volar versus dorsal screw fixation of scaphoid waist fractures under physiological loading conditions utilizing finite element analysis. METHODS: A transverse scaphoid waist fracture (Herbert type B2) model was fixed with a headless cannulated compression screw using either a volar or dorsal approach...
September 1, 2018: Orthopaedics & Traumatology, Surgery & Research: OTSR
Karuppaiah Karthik, Vidhya Kasilingam, Kerementi Othieno-P'otonya
The lateral collateral ligament (LCL) complex of the elbow is a capsuloligamentous structure, critical for elbow stability. Though isolated ligamentous injuries have been reported in literature, there are no studies reporting avulsion fractures of the lateral ligamentous complex of the elbow with joint incarceration in a child. An 11-year-old boy presented to the emergency department after a fall from height, with pain and swelling to the lateral side of his left elbow. Radiographs established a fracture of the lateral condyle and CT imaging confirmed an avulsion of the lateral ligamentous complex, with fragments in the inferior radiocapitellar joint...
September 1, 2018: BMJ Case Reports
Melissa M Simonik, Jessica Wilczek, Guido LaPorta, Ryan Willing
Charcot neuroarthropathy often results in a rocker-bottom foot deformity, which leads to ulceration, infection, and amputation. Surgical techniques to reconstruct the medial column include intramedullary beaming and plantar plating, with disagreement regarding which approach provides a stronger construct with superior stability and fixation. The objective of the present cadaveric study was to compare the construct rigidity and strength of beaming and plantar plating of the medial column of 5 paired bilateral feet...
August 29, 2018: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
Corey T Walker, Jakub Godzik, David S Xu, Nicholas Theodore, Juan S Uribe, Steve W Chang
Lateral interbody fusion has distinct advantages over traditional posterior approaches. When adjunctive percutaneous pedicle screw fixation is required, placement from the lateral decubitus position theoretically increases safety and improves operative efficiency by obviating the need for repositioning. However, safe cannulation of the contralateral, down-side pedicles remains technically challenging and often prohibitive. In this video, we present the case of a 59-yr-old man with refractory back pain and bilateral lower extremity radiculopathy that was worse on the left than right side...
August 30, 2018: Operative Neurosurgery (Hagerstown, Md.)
Baran Komur, Baris Yilmaz, Erdem Kaan, Bulent Yucel, Tahir Mutlu Duymus, Guzelali Ozdemir, Olcay Guler
We compared 2 different fixation methods (bioabsorbable pins and cannulated screws) after chevron osteotomy for the treatment of hallux valgus. We reviewed consecutive proximal chevron osteotomies in 80 patients (100 feet) performed by 2 surgeons. Of the 100 feet (80 patients), 48 feet (40 patients) were stabilized with bioabsorbable pins, and 52 feet (40 patients) were stabilized with cannulated screws. In the pin group, 8 patients were male (20%) and 32 were female (80%). In the screw group, 10 patients were male (25%) and 30 were female (75%)...
September 2018: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
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