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https://www.readbyqxmd.com/read/28529660/biomechanical-considerations-in-slipped-capital-femoral-epiphysis-and-insights-into-prophylactic-fixation
#1
E Leblanc, J M Bellemore, T Cheng, D G Little, O Birke
PURPOSE: Slipped capital femoral epiphysis (SCFE) is a deformity of the proximal femur secondary to widened and unstable physis. In stabilising the slip, gold standard treatments stop growth and involve premature physeal closure, which prevents the remodelling of the acquired deformity and creates a leg length discrepancy that may be significant in younger patients. METHODS: We measured the impact of placing threaded screws across the proximal femoral physis by measuring the centre-trochanteric distance (CTD) and articulo-trochanteric distance (ATD) in participants with or without prophylactic fixation...
April 2017: Journal of Children's Orthopaedics
https://www.readbyqxmd.com/read/28523087/assessment-of-fixation-of-mandibular-interforaminal-fractures-by-using-a-single-second-generation-headless-compression-screw-a-pilot-study
#2
Rangila Ram, Razi Ahsan, Yogesh Bhardwaj, Narotam Ghezta, Santosh Kumar
The aim of this article is to evaluate the efficacy of a single second-generation headless compression screw along with a lower arch bar in the fixation of interforaminal mandible fractures. A total of seven patients were included in the study. An open approach was used either intraorally or extraorally. A second-generation 3.0 HCS (headless compression screw), 24 to 32 mm in length, diameter at the head of 3.5 mm, smooth shaft with 2.0 mm and at the leading edge 3.0 mm (Synthes, Paoli, PA) was used for the fixation along with a lower arch bar...
June 2017: Craniomaxillofacial Trauma & Reconstruction
https://www.readbyqxmd.com/read/28520623/the-sub-crestal-iliac-screw-a-technical-note-describing-a-free-hand-in-line-low-profile-iliac-screw-insertion-technique-to-avoid-side-connector-use-and-reduce-implant-complications
#3
Gabriel Liu, Muhammed Yaser Hasan, Hee-Kit Wong
STUDY-DESIGN: Case-series. OBJECTIVE: Report our modified iliac-screw insertion technique and its clinical outcomes. SUMMARY OF BACKGROUND DATA: Iliac-screws are one of the preferred methods for modern spinopelvic-fixation. However the technique is not without complications, predominantly due to iliac-screw head prominence, leading to pain and revisions. Conventional iliac-screw entry point is sited superficially at the posterior-superior-iliac-spine (PSIS) contributing to screw-head prominence...
May 17, 2017: Spine
https://www.readbyqxmd.com/read/28511967/a-sliding-hip-screw-augmented-with-2-screws-is-biomechanically-similar-to-an-inverted-triad-of-cannulated-screws-in-repair-of-a-pauwels-type-iii-fracture
#4
B Kemker, K Magone, J Owen, P Atkinson, S Martin, T Atkinson
OBJECTIVE: Pauwels III femoral neck fractures are highly unstable. These fractures are commonly treated with three cannulated screws or sliding hip screw (SHS) implants, however high rates of non-union persist. A hybrid SHS construct has recently been proposed. The objective of the study was to compare this construct to the familiar inverted triad of cannulated screws and to a single SHS. METHODS: Fourth generation biomechanical femur analogs were used to create a highly repeatable injury model...
May 8, 2017: Injury
https://www.readbyqxmd.com/read/28507975/charcot-fracture-in-the-calcaneus-after-total-knee-arthroplasty-a-case-report
#5
Hirokazu Takai, Katsuhiko Kiyota, Nobutake Nakane, Tomoki Takahashi
INTRODUCTION: Only a few reports have described calcaneus fractures after total knee arthroplasty (TKA). Therefore, in this report, we describe a case of calcaneal avulsion fracture that occurred 5 weeks after a TKA in a relatively young male patient with syphilis. CASE REPORT: A 63-year-old man with syphilis had Charcot joint of the right knee. The patient developed severe varus deformity and contracture and experienced severe pain in the knee. TKA was performed to alleviate the pain and improve the patient's gait...
November 2016: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28497280/a-minimal-soft-tissue-damage-approach-of-spondylolysis-repair-in-athletes-preliminary-report
#6
Łukasz Bartochowski, Wojciech Jurasz, Jacek Kruczyński
PURPOSE AND HYPOTHESIS: Both spondylolysis and spondylolisthesis come in second place in the causes of pain among athletes. Treatment options include both conservative management and different operative methods. Athletes and adolescents are groups where the priority is to protect tissues from perioperative damage. OBJECTIVE: We present our modification of the Buck's, direct pars repair method, which we believe offers maximum protection of tissues. We used the modified surgical method in young, competitive athletes, in whom non-surgical treatment was not effective...
May 11, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/28493039/complications-after-surgical-treatment-of-femoral-neck-fractures-in-men-with-alcohol-dependence-syndrome-retrospective-register-analysis-of-154-cases
#7
Jussi Kosola, Antti Kaipia, Minna K Laitinen, Jyrki Nieminen
PURPOSE: One-third of hip fractures occur in men. The causes underlying hip fractures in men differ from those in women and include alcohol abuse. This retrospective register study evaluated the trends and results associated with different surgical treatment methods for nondisplaced and displaced femoral neck fractures in male patients with alcohol dependence syndrome. METHODS: Men with hip fractures were identified from a local district hospital database. Alcohol dependence syndrome was identified as a diagnosis in medical records...
May 10, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28490878/a-novel-injectable-calcium-phosphate-based-nanocomposite-for-the-augmentation-of-cannulated-pedicle-screw-fixation
#8
Haolin Sun, Chun Liu, Huiling Liu, Yanjie Bai, Zheng Zhang, Xuwen Li, Chunde Li, Huilin Yang, Lei Yang
Polymethyl methacrylate (PMMA)-augmented cannulated pedicle-screw fixation has been routinely performed for the surgical treatment of lumbar degenerative diseases. Despite its satisfactory clinical outcomes and prevalence, problems and complications associated with high-strength, stiff, and nondegradable PMMA have largely hindered the long-term efficacy and safety of pedicle-screw fixation in osteoporotic patients. To meet the unmet need for better bone cement for cannulated pedicle-screw fixation, a new injectable and biodegradable nanocomposite that was the first of its kind was designed and developed in the present study...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28479162/comparison-of-the-outcomes-between-headless-cannulated-screw-fixation-and-fixation-using-a-locking-compression-distal-ulna-hook-plate-in-fracture-of-fifth-metatarsal-base
#9
Jun-Beom Kim, In-Soo Song, Byeong-Seop Park, Chi-Hoon Ahn, Cheol-U Kim
The aim of the present study was to evaluate and compare the clinical and radiologic results of internal fixation with a headless cannulated screw versus a locking compression distal ulna hook plate for fractures at the base of the fifth metatarsal bone, zone 1. From April 2012 to April 2015, 30 cases (29 patients) were retrospectively evaluated. The mean follow-up period was 13 months. The patients were divided into 2 groups stratified by the fixation method: screw (group A, n = 15) or plate (group B, n = 15)...
May 4, 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28471920/vertically-oriented-femoral-neck-fractures-a-biomechanical-comparison-of-three-fixation-constructs
#10
Joey P Johnson, Todd R Borenstein, Gregory R Waryasz, Stephen A Klinge, Philip K McClure, Alison Biercevicz Chambers, Roman A Hayda, Christopher T Born
OBJECTIVES: The purpose of this study was to compare the static and dynamic mechanical properties of a modified crossed cannulated screw configuration (CS), the inverted triangle cannulated screw configuration (IT) and a compression hip screw with derotation screw (CHS) in Pauwels Type III femoral neck fractures. METHODS: Thirty synthetic femora were divided into three groups and vertical femoral neck osteotomies were made. Ten osteotomized femora were fixed with a modified cross screw (CS) configuration, ten were fixed with three parallel screws in an inverted triangle (IT) configuration, and the remaining ten osteotomized femora were fixed with a compression hip screw (CHS) construct...
March 23, 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28460872/fixation-of-fractures-of-the-condylar-head-of-the-mandible-with-a-new-magnesium-alloy-biodegradable-cannulated-headless-bone-screw
#11
H Leonhardt, A Franke, N M H McLeod, G Lauer, A Nowak
It is difficult to fix fractures of the condylar head of the mandible. Several techniques have been described which show satisfactory outcomes, but stability can be questionable, and some can cause irritation of the soft tissues. We describe a technique and first results of treating such fractures with resorbable magnesium-based headless bone screws (Magnezix(®) 2.7mm CS; Syntellix AG, Hanover, Germany).
April 28, 2017: British Journal of Oral & Maxillofacial Surgery
https://www.readbyqxmd.com/read/28460835/a-chronic-in-situ-coil-system-adapted-for-intracerebral-stimulation-during-mri-in-rats
#12
Dan Madularu, Chathura Kumaragamage, Axel P Mathieu, Praveen Kulkarni, M Natasha Rajah, Alain P Gratton, Jamie Near
BACKGROUND: We describe the fabrication and performance of a chronic in situ coil system designed to allow focal brain stimulation in rats while acquiring functional MRI data. NEW METHOD: An implantable receive-only surface radiofrequency coil (iCoil) was designed to be fitted subcutaneously, directly onto to the rat skull surface during the intracerebral cannulation procedure. The coil is fixed in place using acrylic dental cement anchored to four screws threaded into the skull...
June 1, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28459421/comparison-of-fatigue-performance-between-fully-and-partially-threaded-cannulated-screws-used-for-stabilization-of-slipped-capital-femoral-epiphyses
#13
Stephen Stacey, William Barfield, Luke Pietrykowski, John DesJardins, James Mooney
Cannulated screws are widely used for the treatment of slipped capital femoral epiphysis; however, the optimal choice and number of implants have not been clearly defined. Studies have shown that two screws are biomechanically superior to a single screw in load-to-failure testing, but the fatigue performance of different screw designs has not been investigated. This study compared the fatigue characteristics of fully and partially threaded cannulated screws. Partially and fully threaded 7.3-mm screws were subjected to cyclic loading on a custom testing fixture...
2017: Journal of Surgical Orthopaedic Advances
https://www.readbyqxmd.com/read/28443251/partial-heel-pad-avulsion-with-open-calcaneal-tuberosity-fracture-with-tendo-achilles-rupture-a-case-report
#14
Shameem Ahmed, Syed Ifthekar, R Pathan Rameez Ahmed Khan, Rahul Ranjan
INTRODUCTION: The management of heel pad avulsion injuries has been challenging because of the precarious blood supply. The difficulties get compounded when it is associated with tendo-achilles rupture and calcaneal fracture. Here, it is a description of a case with the above features managed with a unique technique. CASE REPORT: A 63-year-old woman presented to casualty with injury to right ankle after a road traffic accident. On clinical and radiological examination, there was avulsion of heel pad with calcaneal tuberosity fracture and tendo-achilles rupture...
September 2016: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28439307/fluoroscopic-imaging-overestimates-the-screw-tip-to-subchondral-bone-distance-in-a-cadaveric-model-of-slipped-capital-femoral-epiphysis
#15
M J Heffernan, B Snyder, H Zhou, X Li
PURPOSE: Intra-operative imaging plays a key role in screw placement for slipped capital femoral epiphysis (SCFE). Complications have been associated with inadequate screw position. The purpose of this study was to evaluate computed tomography (CT) (3D fluoroscopy) and standard fluoroscopy (C-arm) images as compared with direct anatomic measurement to determine final screw position in a cadaveric SCFE model. METHODS: Osteotomy with pinning was performed at the physeal scar in ten cadaveric hips...
2017: Journal of Children's Orthopaedics
https://www.readbyqxmd.com/read/28435557/internal-fixation-of-transverse-patella-fractures-using-cannulated-cancellous-screws-with-anterior-tension-band-wiring
#16
I Khan, M Y Dar, S Rashid, M F Butt
Aims: To evaluate the effectiveness and safety of anterior tension band wiring technique using two cannulated cancellous screws in patients with transverse (AO34-C1) or transverse with mildly comminuted (AO34-C2) patellar fractures. Materials and Methods: This is a prospective study of 25 patients with transverse fracture or transverse fracture with mildly comminuted patella fractures. All the patients were treated with open reduction and internal fixation using two parallel cannulated screws and 18G stainless steel wire as per the tension band principle...
July 2016: Malaysian Orthopaedic Journal
https://www.readbyqxmd.com/read/28431804/prognostic-value-of-dynamic-mri-positive-enhancement-integral-color-mapping-in-osteosynthesis-of-undisplaced-femoral-neck-fractures
#17
Masatoshi Morimoto, Yoshinori Takahashi, Takahiro Kubo, Kosuke Sugiura, Yasuaki Tamaki, Shunichi Toki, Katsuyoshi Suganuma, Kazumasa Inoue, Keisuke Adachi, Takashi Chikawa, Koichi Sairyo, Akihiro Nagamachi
AIMS: The common treatment for an undisplaced femoral neck fracture is osteosynthesis. Two major complications of osteosynthesis are non-union and late collapse of the femoral head. We speculated that femoral head perfusion is one of the most important factors that affect the outcome of osteosynthesis after femoral neck fracture. We have preoperatively estimated femoral head perfusion by dynamic MRI positive enhancement integral color mapping (PEICM). The purpose of this study was to evaluate the outcomes of undisplaced femoral neck fractures based on PEICM...
April 18, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/28428920/surgical-strategy-and-techniques-for-low-profile-dorsal-plating-in-treating-dorsally-displaced-unstable-distal-radius-fractures
#18
Yoshitaka Hamada, Hiroyuki Gotani, Naohito Hibino, Yoshitaka Tanaka, Ryousuke Satoh, Kousuke Sasaki, Thepparat Kanchanathepsak
Background The low-profile dorsal locking plating (DLP) technique is useful for treating dorsally comminuted intra-articular distal radius fractures; however, due to the complications associated with DLP, the technique is not widely used. Methods A retrospective review of 24 consecutive cases treated with DLP were done. Results All cases were classified into two types by surgical strategy according to the fracture pattern. In type 1, there is a volar fracture line distal to the watershed line in the dorsally displaced fragment, and this type is treated by H-framed DLP...
May 2017: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/28422889/an-in-vitro-biomechanical-evaluation-of-an-expansive-double-threaded-bi-directional-compression-screw-for-fixation-of-type-ii-odontoid-process-fractures-a-squire-compliant-article
#19
Ning Liu, Li Tian, Rong-Xian Jiang, Chao Xu, Lei Shi, Wei Lei, Yang Zhang
Odontoid process fracture accounts for 5% to 15% of all cervical spine injuries, and the rate is higher among elderly people. The anterior cannulated screw fixation has been widely used in odontoid process fracture, but the fixation strength may still be limited under some circumstances. This study aims to investigate the biomechanical fixation strength of expansive double-threaded bi-directional compression screw (EDBCS) compared with cannulated lag screw (CLS) and improved Herbert screw (IHS) for fixation of type II odontoid process fracture...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28416835/-polymethylmethacrylate-augmentation-of-bone-cement-injectable-cannulated-pedicle-screws-was-used-to-treat-degenerative-lumbar-scoliosis-with-osteoporosis
#20
H L Sun, C D Li, X W Li, X D Yi, H Liu, H L Lu, H Li, Z R Yu, Y Wang
OBJECTIVE: To describe the application of polymethylmethacrylate (PMMA) augmentation of cement-injectable cannulated pedicle screws for the treatment of degenerative lumbar scoliosis with osteoporosis. METHODS: Retrospective cohort study was used to compare cement injectable cannulated pedicle screws (CICPs) group with PMMA augmentation and control group with traditional method in the correction surgery for Lenke-silva level III and level IV degenerative scoliosis cases with osteoporosis...
April 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
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