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https://www.readbyqxmd.com/read/29783121/the-influence-of-nail-blocking-conditions-in-cattle-femoral-fractures
#1
Leopoldo A Paolucci, Estevam B Las Casas, Rafael R Faleiros, Cahuê F R Paz, Sergio S Rocha Junior
BACKGROUND: To investigate the effect of different fixation strategies of the intramedullary interlocking nail (IIN) on the mechanical behavior of a polymeric implant applied for femoral fracture fixation in calves, and to evaluate the performance of a glass fiber-reinforced polymer applied in a bovine femoral fracture reduction system, five Holstein male animals with a mean weight (±SD) of 62.8 ± 20.4 kg and aged 74 ± 15 were used to generate biomechanical parameters for this study...
May 7, 2018: Research in Veterinary Science
https://www.readbyqxmd.com/read/29779707/ideal-starting-point-and-trajectory-of-a-screw-for-the-dorsal-approach-to-scaphoid-fractures
#2
Asher Kupperman, Ryan Breighner, Eliana Saltzman, Darryl Sneag, Scott Wolfe, Steve Lee
PURPOSE: To determine the screw starting point and trajectory for the dorsal approach to scaphoid fractures that provides a combination of length and compression at the fracture site. METHODS: Computed tomography scans were obtained of 10 scaphoid fractures for 3 common fracture types. A computerized model was generated for each scaphoid. Screw starting point, length, and angle to the fracture plane were analyzed for starting points and trajectories within a safe zone that protected against cortical penetration...
May 17, 2018: Journal of Hand Surgery
https://www.readbyqxmd.com/read/29747611/an-in-vitro-study-evaluating-the-effect-of-ferrule-design-on-the-fracture-resistance-of-endodontically-treated-mandibular-premolars-after-simulated-crown-lengthening-or-forced-eruption-methods
#3
Qingfei Meng, Qian Ma, Tianda Wang, Yaming Chen
BACKGROUND: The purpose of this study was to evaluate the effect of ferrule design on the fracture resistance of endodontically treated mandibular first premolars after simulated crown lengthening and orthodontic forced eruption methods restored with a fiber post-and-core system. METHODS: Forty extracted and endodontically treated mandibular first premolars were decoronated to create lingual-to-buccal oblique residual root models, with a 2.0 mm height of the lingual dentine wall coronal to the cemento-enamel junction, and the height of buccal surface at the cemento-enamel junction...
May 10, 2018: BMC Oral Health
https://www.readbyqxmd.com/read/29744649/a-comparative-biomechanical-study-on-different-fixation-techniques-in-the-management-of-transverse-metaphyseal-diaphyseal-junction-fractures-of-the-distal-humerus-in-children
#4
Allieu Kamara, Xianglu Ji, Tianjing Liu, Yu Zhan, Jianjun Li, Enbo Wang
BACKGROUND: Metaphyseal-diaphyseal junction (MDJ) fractures of the distal humerus are problematic to reduce and more susceptible to post-operative complications. This biomechanical study was designed to compare Kirschner wires (KW), lateral external fixation, and elastic stable intramedullary nails (ESIN) in simulated transverse MDJ fractures of various heights. METHOD: Sagittally oblique, transverse MDJ fractures were created in fourth-generation composite bone models at three levels: high, mid, and low fractures, respectively, and then fixed with either Kirschner wires, lateral external fixation (EF), or ESIN respectively and tested in extension, flexion, valgus, varus, internal, and external rotations...
May 9, 2018: International Orthopaedics
https://www.readbyqxmd.com/read/29736185/evaluation-of-different-restoration-combinations-used-in-the-reattachment-of-fractured-teeth-a-finite-element-analysis
#5
Nagihan Guven, Ozgur Topuz, İhsan Yikilgan
Objective: The purpose of this study was to test different restoration combinations used for constructing fractured endodontically treated incisors by reattaching their fractured fragments. Methods: Seven types of 3-D FEM mathematical root canal-filled models were generated, simulating cases of (OB) reattaching fractured fragments; (CrPL) reattaching fractured fragments + ceramic palatinal laminate; (CmPL) reattaching fractured fragments + composite palatinal laminate; (CM) reattaching fractured fragments + coronal 1/3 of the root was filled using core material; (BP) reattaching fractured fragments + glass fiber post; (CP) composite resin restoration + glass fiber post; and (OC) composite resin restoration...
2018: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/29725847/classification-proposal-for-fractures-of-the-processus-condylaris-mandibulae
#6
Marcin Kozakiewicz
OBJECTIVE: The current classification of mandibular condyle fractures as basal, low neck, and high neck as reported by Loukota et al. (Br J Oral Maxillofac Surg 43:72-73, 2005) and Neff et al. (Craniomaxillofac Trauma Reconstr 7:S44-S58, 2014) has a weakness. Nearly no high-neck fractures are reported (they are typically classified as type C head fractures) contrary to basal condylar fractures, which are overestimated (nearly all low-neck fractures are classified as basal). The aim of this study is to present a modified AO/SORG classification of mandibular condyle fractures...
May 3, 2018: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29707289/fractures-of-the-manubrium-sterni-treatment-options-and-a-possible-classification-of-different-types-of-fractures
#7
Stefan Schulz-Drost, Sebastian Krinner, Pascal Oppel, Sina Grupp, Melanie Schulz-Drost, Friedrich F Hennig, Andreas Langenbach
Background: Sternum fractures are mostly located on the sternal corpus, seldom on the manubrium. Fractures of the sternal manubrium are, however, more frequently associated with severe concomitant injuries of thoracic organs, and therefore deserve special attention. In addition, in its function as a capstone in between the anterior chest wall and the shoulder girdle, it is exposed to a multiplicity of forces. Therefore the questions arise what types of fractures are observed in today's clinical practice, how to classify them and which treatment options are available...
March 2018: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29707049/rate-of-displacement-for-jakob-type-1-lateral-condyle-fractures-treated-with-a-cast
#8
C Zale, Z A Winthrop, W Hennrikus
Purpose: The aim of this retrospective study is to report the rate of displacement of Jakob Type 1 lateral condyle fractures that were initially treated in a cast. Methods: We performed a retrospective review of all patients that were treated for a non-displaced (Jakob Type 1 < 2 mm) lateral condyle fracture of the humerus at our institution between 2002 and 2015. Results: A total of 59 patients were initially treated with casting. Five fractures displaced and were converted to a closed pinning treatment plan with a conversion rate of 8...
April 1, 2018: Journal of Children's Orthopaedics
https://www.readbyqxmd.com/read/29706731/percutaneous-intramedullary-headless-screw-fixation-and-wide-awake-anesthesia-to-treat-metacarpal-fractures-early-results-in-25-patients
#9
Andrea Poggetti, Anna Maria Nucci, Thomas Giesen, Maurizio Calcagni, Stefano Marchetti, Michele Lisanti
Metacarpal fractures constitute 7.8% of the upper extremity fractures. The common treatments remain nonsurgical procedure, but high-demanding patients or unstable fractures require fixation with Kirschner wire (K-wires), plate, and screws. However, these approaches may cause scarring and adhesion with poor functional results. From 2014 to 2015, the authors used an intramedullary headless screw to treat 25 patients (24 men, 1 woman) with metacarpal bones fractures (20 V, 3 IV, 1 III, and 1 II). The fractures patterns were 23 fractures of distal third of metacarpal bone (16 oblique, 5 comminute configurations, and 2 transverse), 1 fracture of the base of the II metacarpal bone...
April 2018: Journal of Hand and Microsurgery
https://www.readbyqxmd.com/read/29681436/compatibility-of-lauge-hansen-classification-between-plain-radiographs-and-magnetic-resonance-imaging-in-ankle-fractures
#10
Haluk Çabuk, Filiz Çelebi, Yunus İmren, Süleyman Semih Dedeoğlu, Mustafa Çağlar Kır, Abdullah Faruk Uyanık, Hakan Gürbüz
We evaluated the accuracy of the predictive injury sequences of the Lauge-Hansen (L-H) classification using magnetic resonance imaging (MRI) in patients with ankle fractures and determined the possible causes of mismatch. Sixty-five patients with ankle fractures who had a complete series of anteroposterior, lateral, and oblique radiographs and ankle MRI studies available were included. The fracture pattern was assigned by 2 senior orthopedic surgeons according to the L-H classification system. The syndesmotic ligaments, lateral collateral ligaments, and medial deltoid complex ligaments were evaluated on the preoperative MRI scans...
April 19, 2018: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/29670714/the-evaluation-of-root-fracture-with-cone-beam-computed-tomography-cbct-an-epidemiological-study
#11
Mehmet-Sinan Doğan, Michele Callea, Lindawati S Kusdhany, Ahmet Aras, Diah-Ayu Maharani, Masita Mandasari, Melissa Adiatman, Izzet Yavuz
Background: The aim of this study was evaluation of the cone-beam computed tomography (CBCT) image of 50 patients at the ages of 8-15 suspecting root fracture and root fracture occurred, exposed to dental traumatic. In additionally, this study was showed effect of crown fracture on root fracture healing. Material and Methods: All of the individuals included in the study were obtained images with the cone-beam computed tomography range of 0,3 voxel and 8.9 seconds...
January 2018: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/29657465/do-demographic-and-perioperative-parameters-really-affect-the-final-outcomes-of-pediatric-femur-shaft-fractures-managed-by-elastic-nails-a-prospective-study
#12
Abhinandhan Reddy, Narendran Pushpasekaran, Jitendra Singh, Gokul Chand Verma, Sathyamurthy Palanisamy
Objective: Pediatric femoral shaft fractures are more commonly treated with intramedullary titanium elastic nail system (TENS). Adhering to the principles, most studies had supported excellent results with this instrumentation and attributed the variation in age, weight, immobilization protocols, technical factors like fracture pattern, reduction and complications as reasons to poor outcomes in their individual studies. Hence, we wanted to identify the potential demographic and perioperative parameters that could affect the final outcomes in this cohort...
March 2018: Journal of Orthopaedics
https://www.readbyqxmd.com/read/29619121/intra-articular-fracture-of-the-distal-part-of-the-triquetrum-within-the-pisotriquetral-joint-case-report-and-review-of-literature
#13
V Athanasiou, A Panagopoulos, I D Iliopoulos, I Vrahnis, G Diamantakis, P Kraniotis, M Tyllianakis
Background: Intra-articular fractures of the distal part of the triquetrum within the pisotriquetral joint are uncommon, and can be associated with tears of the dorsal carpal ligaments, pisiform subluxation and/or FCU dislocation. Their diagnosis is difficult and requires a high clinical suspicion and a proper radiological examination including oblique wrist x-rays, computed tomography and MRI scan. These fractures can be delayed diagnosed due to late presentation thus leading to painful nonunion, persistent instability and late pisotriquetral arthritis...
2018: Open Orthopaedics Journal
https://www.readbyqxmd.com/read/29584491/active-muscle-response-contributes-to-increased-injury-risk-of-lower-extremity-in-occupant-knee-airbag-interaction
#14
Bingbing Nie, Deepak Sathyanarayan, Xin Ye, Jeff R Crandall, Matthew B Panzer
OBJECTIVE: Recent field data analysis has demonstrated that knee airbags (KABs) can reduce occupant femur and pelvis injuries but may be insufficient to decrease leg injuries in motor vehicle crashes. An enhanced understanding of the associated injury mechanisms requires accurate assessment of physiological-based occupant parameters, some of which are difficult or impossible to obtain from experiments. This study sought to explore how active muscle response can influence the injury risk of lower extremities during KAB deployment using computational biomechanical analysis...
February 28, 2018: Traffic Injury Prevention
https://www.readbyqxmd.com/read/29565705/zygomatic-dental-implant-induced-orbital-fracture-and-inferior-oblique-trauma
#15
Ann Q Tran, Daniela P Reyes-Capó, Nimesh A Patel, Joshua Pasol, Hilda Capó, Sara T Wester
A 51-year-old female underwent four upper zygomatic dental implants (ZI) and one upper and four lower conventional implants. Immediately postoperatively, the patient had pain and diplopia upon manual elevation of the edematous eyelid. Panoramic x-ray showed a malpositioned right upper ZI, requiring removal of the right upper ZI the following day. The patient had delayed referral to ophthalmology one month later for persistent diplopia. Computed tomography scan and magnetic resonance imaging demonstrated a right inferolateral fracture with fibrosis surrounding the inferior oblique muscle...
March 22, 2018: Orbit
https://www.readbyqxmd.com/read/29553087/oblique-chest-x-ray-an-alternative-way-to-detect-pneumothorax
#16
Cumhur Murat Tulay, Sadık Yaldız, Adnan Bilge
PURPOSE: To identify occult pneumothorax with oblique chest X-ray (OCXR) in clinically suspected patients. METHODS: In this retrospective study, we examined 1082 adult multitrauma patients who were admitted to our emergency service between January 2016 and January 2017. Clinical findings that suggest occult pneumothorax were rib fracture, flail chest, chest pain, subcutaneous emphysema, abrasion or ecchymosis and moderate to severe hypoxia in clinical parameters...
March 16, 2018: Annals of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29507523/energy-approach-to-brittle-fracture-in-strain-gradient-modelling
#17
Luca Placidi, Emilio Barchiesi
In this paper, we exploit some results in the theory of irreversible phenomena to address the study of quasi-static brittle fracture propagation in a two-dimensional isotropic continuum. The elastic strain energy density of the body has been assumed to be geometrically nonlinear and to depend on the strain gradient. Such generalized continua often arise in the description of microstructured media. These materials possess an intrinsic length scale, which determines the size of internal boundary layers. In particular, the non-locality conferred by this internal length scale avoids the concentration of deformations, which is usually observed when dealing with local models and which leads to mesh dependency...
February 2018: Proceedings. Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/29487957/treatment-of-proximal-phalanx-fractures-transarticular-pinning-the-metacarpophalangeal-joint-or-cross-pinning-from-the-base-of-the-proximal-phalanx-a-prospective-study
#18
A R Saied, M Sabet Jahromi
INTRODUCTION: For extraarticular proximal phalanx fractures, two methods are employed, transarticular fixation in which the metacarpophalangeal joint is crossed and the extraarticular method in which the pins are introduced through the base of the proximal Phalanx. MATERIALS AND METHODS: This study was a prospective one on patients with proximal phalanx transverse or short oblique fractures. In one of the groups we used parallel pins from metacarpal head through MCP joint to proximal phalanx...
February 27, 2018: European Journal of Trauma and Emergency Surgery: Official Publication of the European Trauma Society
https://www.readbyqxmd.com/read/29466912/radial-shaft-fracture-obliquity-as-a-predictor-of-distal-radioulnar-joint-instability
#19
Benjamin T K Ding, Kaamini Pillay, Sreedharan Sechachalam
We assessed whether radial shaft fracture obliquity measurements on radiographs could predict intra-operative distal radioulnar joint instability. We also clinically validated previously described predictors of distal radioulnar joint instability, which included a fracture line within 7.5 cm of the lunate fossa, radial shortening >5 mm, and ulna styloid fracture. We retrospectively analysed the radiographs of all surgically managed patients in our unit with radial shaft fractures from 2006 through 2016...
January 1, 2018: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/29457403/-traditional-manipulative-reduction-and-percutaneous-elastic-intramedullary-nail-fixation-for-the-treatment-of-proximal-humeral-fractures-in-children
#20
Jun-Yi Wang, Qiao-di Wang
OBJECTIVE: To study clinical effects and safety of traditional manipulative reduction and percutaneous elastic intramedullary nail fixation for the treatment of proximal humeral fractures in children. METHODS: From October 2012 to May 2016, 65 patients with proximal humeral fractures were treated with traditional manipulative reduction and percutaneous elastic intramedullary nail fixation. There were 52 boys and 13 girls, ranging in age from 7 to 14 years old, with an average age of 11...
November 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
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