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https://www.readbyqxmd.com/read/28439704/treatment-of-type-b-pelvic-fracture-using-anterior-subcutaneous-internal-fixator-with-triple-pedicle-screws-a-new-surgical-technique
#1
Qian Wang, Qiugen Wang, Jiandong Wang
INTRODUCTION: To evaluate the clinical outcomes of anterior subcutaneous internal fixator using triple pedicle screws (ASIF/TPS) in the treatment of unstable type B pelvic fracture compared with open reduction internal fixation (ORIF). MATERIALS AND METHODS: This was a retrospective cohort study of 26 patients with type B unstable fractures that underwent ASIF/TPS and 26 similar patients that underwent ORIF using plates and screws. Intraoperative blood loss, operating time, and post operation hospitalization duration were compared...
April 24, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28439161/three-dimensional-analysis-of-the-anatomical-characteristics-and-dimensions-of-the-nasopalatine-canal-using-cone-beam-computed-tomography
#2
Nikhil V Jain, Affaf A Gharatkar, Bandish A Parekh, Smita I Musani, Umang Deepak Shah
AIM: Placement of implants in the maxillary anterior region needs to be preceded by careful analysis of the area as in addition to the functional aspect the esthetic outcome is of prime importance. This descriptive study evaluated anatomical characteristics and dimensions of the nasopalatine canal (NC) from coronal, sagittal and axial aspects using cone beam computed tomography (CBCT) giving it a three dimensional analytical approach. Also the dimensions of the corresponding buccal bone plate (BBP) of the alveolar process were evaluated...
June 2017: Journal of Maxillofacial and Oral Surgery
https://www.readbyqxmd.com/read/28435382/myobiid-mites-trombidiformes-myobiidae-of-the-golden-bat-mimon-cozumelae-from-mexico-description-of-the-male-and-tritonymph-of-ioanella-mimon-and-new-records-of-eudusbabekia-mimon
#3
Angel Herrera-Mares, Carmen Guzmán-Cornejo, Livia León-Paniagua, Gerardo Rivas
The male and the tritonymph of Ioanella mimon are described for the first time parasitizing to Mimon cozumelae from Yucatan, Mexico. Male of Ioanella mimon is characterized by the presence of legs I with the tibia and tarsus fused forming a small complex devoided of apical claws, legs II-IV with two claws, setae vi at level of anterior end of genital plate, genital plate rounded with an anterior projection, all intercoxal setae short; while the tritonymph is characterized by the presence of legs I unequal; legs II-IV with 2-1-1 claws, and posterior region of dorsal idiosoma with 3 pairs of cylindrical and toothed setae...
2017: ZooKeys
https://www.readbyqxmd.com/read/28434863/spatiotemporally-controlled-mechanical-cues-drive-progenitor-mesenchymal-to-epithelial-transition-enabling-proper-heart-formation-and-function
#4
Timothy R Jackson, Hye Young Kim, Uma L Balakrishnan, Carsten Stuckenholz, Lance A Davidson
During early cardiogenesis, bilateral fields of mesenchymal heart progenitor cells (HPCs) move from the anterior lateral plate mesoderm to the ventral midline, undergoing a mesenchymal-to-epithelial transition (MET) en route to forming a single epithelial sheet. Through tracking of tissue-level deformations in the heart-forming region (HFR) as well as movement trajectories and traction generation of individual HPCs, we find that the onset of MET correlates with a peak in mechanical stress within the HFR and changes in HPC migratory behaviors...
April 17, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28430721/outcomes-of-reverse-total-shoulder-arthroplasty-for-proximal-humeral-fractures-primary-arthroplasty-versus-secondary-arthroplasty-following-failed-proximal-humeral-locking-plate-fixation
#5
Emilio Sebastia-Forcada, Alejandro Lizaur-Utrilla, Román Cebrian-Gomez, Francisco A Miralles-Muñoz, Fernando A Lopez-Prats
OBJECTIVE: To compare the outcomes of reverse shoulder arthroplasty (RSA) between patients with failed proximal humeral locking plate (PHLP) fixation and those with acute fractures. DESIGN: Matched case-control study. SETTING: University hospital, level I trauma center. PATIENTS: 30 consecutive patients with fracture sequelae due to failed PHLP fixation (mean age 73) were age- and gender-matched to 30 patients with acute fracture (mean age 75)...
April 6, 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28420364/anterior-inferior-plating-versus-superior-plating-for-clavicle-fracture-a-meta-analysis
#6
Jie Ai, Shun-Li Kan, Hai-Liang Li, Hong Xu, Yang Liu, Guang-Zhi Ning, Shi-Qing Feng
BACKGROUND: The position of plate fixation for clavicle fracture remains controversial. Our objective was to perform a comprehensive review of the literature and quantify the surgical parameters and clinical indexes between the anterior inferior plating and superior plating for clavicle fracture. METHODS: PubMed, EMBASE, and the Cochrane Library were searched for randomized and non-randomized studies that compared the anterior inferior plating with the superior plating for clavicle fracture...
April 18, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28420360/operative-versus-conservative-treatment-of-apophyseal-avulsion-fractures-of-the-pelvis-in-the-adolescents-a-systematical-review-with-meta-analysis-of-clinical-outcome-and-return-to-sports
#7
H Eberbach, L Hohloch, M J Feucht, L Konstantinidis, N P Südkamp, J Zwingmann
BACKGROUND: Avulsion fractures of the pelvic apophyses typically occur in adolescent athletes due to a sudden strong muscle contraction while growth plates are still open. The main goals of this systematic review with meta-analysis were to summarize the evidence on clinical outcome and determine the rate of return to sports after conservative versus operative treatment of avulsion fractures of the pelvis. METHODS: A systematic search of the Ovid database was performed in December 2016 to identify all published articles reporting outcome and return to preinjury sport-level after conservative or operative treatment of avulsion fractures of the pelvis in adolescent patients...
April 19, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28418609/real-time-measurement-of-needle-forces-and-acute-pressure-changes-during-intravitreal-injections
#8
Logan Christensen, Ashlee Cerda, Jeffrey L Olson
BACKGROUND: The purpose of this study was to use a physiological pressure transducer to measure real-time, continuous pressure changes in an ex-vivo study model of porcine eyes to record the amount of force needed for scleral penetration and to measure acute IOP rise during intravitreal injections. METHODS: A pressure transducer was inserted into the anterior chamber of 30 fresh porcine eyes and intraocular pressure was measured two seconds prior to intravitreal injection until two seconds after...
April 18, 2017: Clinical & Experimental Ophthalmology
https://www.readbyqxmd.com/read/28411442/ankle-muscle-co-contractions-during-quiet-standing-are-associated-with-decreased-postural-steadiness-in-the-elderly
#9
Albert H Vette, Dimitry G Sayenko, Michael Jones, Masaki O Abe, Kimitaka Nakazawa, Kei Masani
It has been reported that the elderly use co-contraction of the tibialis anterior (TA) and plantarflexor muscles for longer duration during quiet standing than the young. However, the particular role of ankle muscle co-contractions in the elderly during quiet standing remains unclear. Therefore, the objective of this study was to investigate the association between ankle muscle co-contractions and postural steadiness during standing in the elderly. Twenty-seven young (27.2±4.5yrs) and twenty-three elderly (66...
April 5, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28409337/surgical-considerations-with-the-operative-fixation-of-unstable-paediatric-pelvic-ring-injuries
#10
Mohamed Kenawey
INTRODUCTION: The operative treatment of unstable pelvic injuries in paediatrics is not frequently indicated. The detailed modes of pelvic ring failure, surgical techniques, fixation choices, and peri-operative difficulties are not well reported. METHODS: From September 2010 to March 2016, 62 paediatric patients were admitted to an academic level I trauma center with the diagnosis of pelvic ring injury. Of them, 29 (17 males and 12 females) had operative fixation of unstable pelvic injuries...
April 13, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28403693/anterior-retropharyngeal-plate-screw-fixation-with-bilateral-anterior-transarticular-screws-for-odontoid-fractures-a-new-comprehensive-technique
#11
Sushil Patkar
INTRODUCTION: A certain group of odontoid fractures (Anderson and D' Alonzo Type-2) are usually offered surgical treatment. Common surgical option is an anterior odontoid screw. Some of the fractures are not suitable for anterior odontoid screw (anterior oblique, displaced distal fragments and those with atlantoaxial instability) and these are usually offered posterior transarticular screws (Magerl's) or posterior atlantoaxial screw rod/plate fixation (Goel-Harms technique). Posterior surgery involves atlantoaxial fixation with an indirect attempt to reduce and fuse the fracture ...
April 13, 2017: Neurological Research
https://www.readbyqxmd.com/read/28403135/evaluation-of-impacting-factors-on-facial-bone-thickness-in-the-anterior-maxillary-region
#12
Amirhossein Farahamnd, Fatemeh Sarlati, Saeedeh Eslami, Marjan Ghassemian, Navid Youssefi, Bahareh Jafarzadeh Esfahani
BACKGROUND: The goal of the current study was to measure the width of the labial alveolar bone of the overlying maxillary anterior teeth, based on cone-beam computed tomography (CBCT) images, and the distance between cementoenamel junction (CEJ) and bone crest in adult patients. METHODS: A cross-sectional study was performed using a sample of 132 tomographic scans. Intact maxillary anterior with healthy periodontium and teeth was randomly selected and afterwards assessed by 2 calibrated and independent reviewers...
April 11, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28400724/influence-of-cervical-spine-mobility-on-the-focal-and-postural-components-of-the-sit-to-stand-task
#13
Alain Hamaoui, Caroline Alamini-Rodrigues
The aim of this study was to determine the influence of cervical spine mobility on the focal and postural components of the sit-to-stand transition, which represent the preparatory and execution phases of the task, respectively. Sixteen asymptomatic female participants (22 ± 3 years, 163 ± 0,06 cm, 57,5 ± 5 kg), free of any neurological or musculoskeletal disorders, performed six trials of the sit-to-stand task at maximum speed, in four experimental conditions varying the mobility of the cervical spine by means of three different splints...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28399378/the-adult-and-immature-stages-of-the-new-species-of-the-genus-demodex-acariformes-demodecidae-with-data-on-parasitism-topography-and-topical-specificity-of-demodecid-mites-in-the-yellow-necked-mouse-apodemus-flavicollis-rodentia-muridae
#14
Joanna N Izdebska, Leszek Rolbiecki, Sławomira Fryderyk, Łukasz Mierzyński
Demodex mollis n. sp. is described from the yellow-necked mouse Apodemus flavicollis (Melchior, 1834) from Poland. It is a medium-sized demodecid mite (adult stages are on average 249 µm long) observed in the skin of the eyelid area. The new species is most similar to two other species occupying similar microhabitat in hosts of the same genus - Demodex lacrimalis Lukoschus and Jongman, 1974 from Apodemus sylvaticus Linnaeus, 1758 and Demodex huttereri Mertens, Lukoschus and Nutting, 1983 from Apodemus agrarius (Pallas, 1771), but differs by the following features: the terminal palpi are equipped with 3 spines, including 1 large claw-like and the second single; subgnathosomal setae (setae n) are situated on both sides of the anterior side of the pharyngeal bulb; claws on the leg tarsi are bifurcated and each equipped with large subterminal spur and proximal pointed projection; the opisthosoma is soft and flexible; and aedeagus in males have different shape and localization...
April 11, 2017: Journal of Parasitology
https://www.readbyqxmd.com/read/28398504/degenerative-inter-vertebral-disc-disease-osteochondrosis-intervertebralis-in-europe-prevalence-geographic-variation-and-radiological-correlates-in-men-and-women-aged-50-and-over
#15
Gabriele Armbrecht, Dieter Felsenberg, Melanie Ganswindt, Mark Lunt, Stephen K Kaptoge, Klaus Abendroth, Antonio Aroso Dias, Ashok K Bhalla, Jorge Cannata Andia, Jan Dequeker, Richard Eastell, Krzysztof Hoszowski, George Lyritis, Pavol Masaryk, Joyce van Meurs, Tomasz Miazgowski, Ranuccio Nuti, Gyula Poór, Inga Redlund-Johnell, David M Reid, Helmut Schatz, Christopher J Todd, Anthony D Woolf, Fernando Rivadeneira, Muhammad K Javaid, Cyrus Cooper, Alan J Silman, Terence W O'Neill, Jonathan Reeve
Objectives.: To assess the prevalences across Europe of radiological indices of degenerative inter-vertebral disc disease (DDD); and to quantify their associations with, age, sex, physical anthropometry, areal BMD (aBMD) and change in aBMD with time. Methods.: In the population-based European Prospective Osteoporosis Study, 27 age-stratified samples of men and women from across the continent aged 50+ years had standardized lateral radiographs of the lumbar and thoracic spine to evaluate the severity of DDD, using the Kellgren-Lawrence (KL) scale...
April 7, 2017: Rheumatology
https://www.readbyqxmd.com/read/28396071/influence-of-basis-images-and-skull-position-on-evaluation-of-cortical-bone-thickness-in-cone-beam-computed-tomography
#16
Monikelly do Carmo Chagas Nascimento, Solange Maria de Almeida Boscolo, Francisco Haiter-Neto, Emanuela Carla Dos Santos, Ivo Lambrichts, Ruben Pauwels, Reinhilde Jacobs
OBJECTIVES: The aim of this study was to assess the influence of the number of basis images and the orientation of the skull on the evaluation of cortical alveolar bone in cone beam computed tomography (CBCT). STUDY DESIGN: Eleven skulls with a total of 59 anterior teeth were selected. CBCT images were acquired by using 4 protocols, by varying the rotation of the tube-detector arm and the orientation of the skull (protocol 1: 360°/0°; protocol 2: 180°/0°; protocol 3: 180°/90°; protocol 4: 180°/180°)...
February 14, 2017: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/28391395/biomechanical-analysis-of-anterior-ring-fixation-of-the-ramus-in-type-c-pelvis-fractures
#17
S McLachlin, M Lesieur, D Stephen, H Kreder, C Whyne
PURPOSE: This biomechanical study compared the stability of four different ramus fracture fixation methods for Type C pelvic ring injuries in the absence of posterior fixation. METHODS: A 5-mm vertical osteotomy of the mid-superior and inferior pubic ramus was created in 12 synthetic pelvic models. Four surgical constructs were compared: (1) two-pin AIIS external fixation, (2) 3.5-mm reconstruction plating, (3) bicortical, fully threaded 3.5-mm, and (4) 6.5-mm pubic ramus screws...
April 8, 2017: European Journal of Trauma and Emergency Surgery: Official Publication of the European Trauma Society
https://www.readbyqxmd.com/read/28390685/plate-fixation-for-letenneur-type-i-hoffa-fracture-a-biomechanical-study
#18
Hui Sun, Qi-Fang He, Yi-Gang Huang, Jian-Feng Pan, Cong-Feng Luo, Yi-Min Chai
BACKGROUND: A coronal fracture of the posterior femoral condyle, also known as a Hoffa fracture, is an unusual injury, and there are only a handful of case reports or series exploring it. The optimal fixation method of these intraarticular fractures remains controversial; improper or unstable fixation usually lead to an unsatisfactory prognosis. The use of posterior-anterior or reversed lag screw fixation is still a popular method. Additional buttress plating is also recommended for fixation of these difficult fractures...
March 30, 2017: Injury
https://www.readbyqxmd.com/read/28388735/a-novel-anterior-trans-pedicular-screw-artificial-vertebral-body-system-for-lower-cervical-spine-fixation-a-finite-element-study
#19
Weidong Wu, Chun Chen, Jinpei Ning, Pei-Dong Sun, Jinyuan Zhang, Changfu Wu, Zhenyu Bi, Jihong Fan, Xianliang Lai, Jun Ouyang
Objective A finite element model was used to compare the biomechanical properties of a novel anterior trans-pedicular screw artificial vertebral body system (AVBS) with a conventional anterior screw plate system (ASPS) for fixation in the lower cervical spine. Methods A model of the intact cervical spine (C3-C7) was established. AVBS or ASPS constructs were implanted between C4 and C6. The models were loaded in three-dimensional motion. The Von Mises stress distribution in the internal fixators was evaluated, as well as the range of motion (ROM) and facet joint force...
April 7, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/28379913/misaligned-versus-straight-placement-of-anterior-cervical-plates-a-clinical-and-radiologic-outcomes-study
#20
Kingsley R Chin, Fabio J R Pencle, Shannon D Francis, Chloe A Francis, Jason A Seale, Elijah A Hothem
BACKGROUND: In anterior cervical diskectomy and fusion (ACDF), misaligned plates are concerning because of the risk of screw-and-plate failure; however, these plates also hypothetically have the potential for asymmetric micromotion on the facet and uncovertebral joint. The aim of this study was to determine whether misaligned plate placement during ACDF had clinical benefits compared with straight plate placement. METHODS: Postoperative AP radiographs of 128 consecutive patients who underwent ACDF with anterior cervical plate (ACP) fixation were reviewed, and plate alignment was assessed...
May 2017: Journal of the American Academy of Orthopaedic Surgeons
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