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https://www.readbyqxmd.com/read/28638701/reinnervation-of-denervated-muscle-by-implantation-of-nerve-muscle-endplate-band-graft-to-the-native-motor-zone-of-the-target-muscle
#1
Liancai Mu, Stanislaw Sobotka, Jingming Chen, Themba Nyirenda
INTRODUCTION: Motor endplate reinnervation is critical for restoring motor function of the denervated muscle. We developed a novel surgical technique called nerve-muscle-endplate band grafting (NMEG) for muscle reinnervation. METHODS: Experimentally denervated sternomastoid muscle in the rat was reinnervated by transferring a NMEG from the ipsilateral sternohyoid muscle to the native motor zone (NMZ) of the target muscle. A NMEG pedicle contained a block of muscle (~ 6 × 6 × 3 mm), a nerve branch with axon terminals, and a motor endplate band with numerous neuromuscular junctions...
June 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28634845/histomorphometric-and-immunohistochemical-evaluation-of-collagen-containing-xenogeneic-bone-blocks-used-for-lateral-bone-augmentation-in-staged-implant-placement
#2
Alberto Ortiz-Vigón, Sergio Martinez-Villa, Iñaki Suarez, Fabio Vignoletti, Mariano Sanz
BACKGROUND: The osteoconductive properties of collagen containing xenogeneic bone blocks (CCXBB) remain unclear. The aim of this prospective single-arm clinical study was to assess the histological outcomes of CCXBB blocks used as bone replacement grafts for lateral bone augmentation procedures. METHODS: In 15 patients with severe horizontal alveolar ridge resorption, lateral augmentation procedures were performed using CCXBB as bone replacement grafts. Twenty-six weeks postoperatively, a re-entry procedure was performed to evaluate the bone width for adequate implant placement and two histological specimens were retrieved from each patient, one being processed for ground sectioning and the other for decalcified paraffin-included sections...
December 2017: International Journal of Implant Dentistry
https://www.readbyqxmd.com/read/28634079/relaxin-reduces-susceptibility-to-post-infarct-atrial-fibrillation-in-mice-due-to-anti-fibrotic-and-anti-inflammatory-properties
#3
Thomas Beiert, Vedat Tiyerili, Vincent Knappe, Verena Effelsberg, Markus Linhart, Florian Stöckigt, Sabine Klein, Robert Schierwagen, Jonel Trebicka, Georg Nickenig, Jan W Schrickel, René P Andrié
BACKGROUND: Relaxin-2 (RLX) is a peptide hormone that exerts beneficial anti-fibrotic and anti-inflammatory effects in diverse models of cardiovascular disease. The goal of this study was to determine the effects of RLX treatment on the susceptibility to atrial fibrillation (AF) after myocardial infarction (MI). METHODS: Mice with cryoinfarction of the left anterior ventricular wall were treated for two weeks with either RLX (75 μg/kg/d) or vehicle (sodium acetate) delivered via subcutaneously implanted osmotic minipumps...
June 17, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28632255/intake-of-proton-pump-inhibitors-is-associated-with-an-increased-risk-of-dental-implant-failure
#4
Bruno Ramos Chrcanovic, Jenö Kisch, Tomas Albrektsson, Ann Wennerberg
PURPOSE: To investigate the association between the intake of proton pump inhibitors (PPIs) and the risk of dental implant failure. MATERIALS AND METHODS: The present retrospective cohort study is based on patients consecutively treated between 1980 and 2014 with implant-supported/retained prostheses at one specialist clinic. Modern endosseous dental implants with cylindrical or conical design were included, and only complete cases were considered; ie, only those implants with information available for all variables measured were included in the regression model analysis...
June 20, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28631069/-s2-ala-iliac-screws-for-extended-pelvic-fixation-in-longer-lumbar-instrumentations-description-of-a-freehand-technique
#5
REVIEW
F Lattig, S Weckbach
OBJECTIVE: To reduce the rate of implant failures at the lumbosacral junction in polysegmental lumbar fusions. INDICATIONS: Spinal fusion with deformity correction including L5/S1, revision surgery for pseudoarthrosis L5/S1, screw pull-out and pedicle fractures in S1, and S1/S2 fractures after polysegmental fusions. CONTRAINDICATIONS: Osteosynthesis of complex pelvic ring fractures, tumors of the ilium. Relative contraindication: infection, to avoid contamination of the iliosacral joint...
June 19, 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28628356/clips-versus-resilient-liners-used-with-bilateral-posterior-prefabricated-bars-for-retaining-four-implant-supported-mandibular-overdentures
#6
Mona Gibreel, Mohammed Fouad, Fatma El-Waseef, Nesma El-Amier, Hamdy Marzook
The objective of this research was to clinically compare peri-implant tissue health of bar-clips versus silicone-resilient liners used with bilateral posterior bars for retaining four implant supported mandibular overdentures. Thirty completely edentulous male patients (mean age 65) were randomly assigned into two equal groups. Each patient received four implants in canine and first molar regions of the mandible using flapless surgical technique. Mandibular overdentures were immediately connected to the implants with bilateral prefabricated instant adjusting bars...
June 19, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/28625744/the-anterior-sagittal-transrectal-approach-astra-for-cases-associated-with-rectal-implantation-of-the-urethra-a-retrospective-review-of-six-cases
#7
A Macedo, M I S Silva, J A Pompermaier, S L Ottoni, R de Castro, M Leal da Cruz
INTRODUCTION: Severe genital abnormalities such as urogenital sinus and urethral duplication with ectopic urethra in the rectum represent a major challenge in reconstructive urology. OBJECTIVE: We aimed to review our cases presenting with functional ectopic urethra implanted in the rectum that were treated through an ASTRA approach. METHODS: We reviewed the medical records of all patients who had undergone an ASTRA approach from 2005-2016...
May 17, 2017: Journal of Pediatric Urology
https://www.readbyqxmd.com/read/28624555/sacral-neuromodulation-device-heating-during-lumbar-and-pelvic-mri-a-phantom-study
#8
A Quirouet, P K Bhattacharyya, E J Dielubanza, B C Gill, S E Jones, H B Goldman
OBJECTIVE: To evaluate radiofrequency induced temperature rises associated with performing lumbar and pelvic magnetic resonance imaging studies with an implanted sacral neuromodulation device using a phantom model. MATERIALS AND METHODS: An accepted phantom model of RF-induced heating in human tissue was used to measure the temperature rise in the stimulator lead electrodes and impulse generator under the conditions used during routine clinical lumbar and pelvic MRIs in a 1...
June 14, 2017: Urology
https://www.readbyqxmd.com/read/28623680/what-are-the-incidence-and-factors-associated-with-implant-fracture
#9
Reza Tabrizi, Hossein Behnia, Shahram Taherian, Nima Hesami
PURPOSE: Implant fracture is a serious complication, which leads to treatment failure. The purpose of this study is to estimate the incidence of implant fractures and identify factors associated with them. MATERIALS AND METHODS: In this retrospective cohort study, the sample was derived from 2 implant centers. The predictors were grouped into the following categories: demographic, location of implant, physical characteristic of implant, implant-abutment connection, type of prosthesis, type of retention, and outcome variable (time to implant fracture)...
May 24, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28618377/ring-and-peg-electrodes-for-minimally-invasive-and-long-term-sub-scalp-eeg-recordings
#10
Y B Benovitski, A Lai, C C McGowan, O Burns, V Maxim, D A X Nayagam, R Millard, G D Rathbone, M A le Chevoir, R A Williams, D B Grayden, C N May, M Murphy, W J D'Souza, M J Cook, C E Williams
OBJECTIVE: Minimally-invasive approaches are needed for long-term reliable Electroencephalography (EEG) recordings to assist with epilepsy diagnosis, investigation and more naturalistic monitoring. This study compared three methods for long-term implantation of sub-scalp EEG electrodes. METHODS: Three types of electrodes (disk, ring, and peg) were fabricated from biocompatible materials and implanted under the scalp in five ambulatory ewes for 3months. Disk electrodes were inserted into sub-pericranial pockets...
June 12, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28615491/enhanced-osteointegration-of-poly-methylmethacrylate-bone-cements-by-incorporating-strontium-containing-borate-bioactive-glass
#11
Xu Cui, Chengcheng Huang, Meng Zhang, Changshun Ruan, Songlin Peng, Li Li, Wenlong Liu, Ting Wang, Bing Li, Wenhai Huang, Mohamed N Rahaman, William W Lu, Haobo Pan
Although poly(methylmethacrylate) (PMMA) cements are widely used in orthopaedics, they have numerous drawbacks. This study aimed to improve their bioactivity and osseointegration by incorporating strontium-containing borate bioactive glass (SrBG) as the reinforcement phase and bioactive filler of PMMA cement. The prepared SrBG/PMMA composite cements showed significantly decreased polymerization temperature when compared with PMMA and retained properties of appropriate setting time and high mechanical strength...
June 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28615331/comparison-of-the-vta-and-lc-response-to-methylphenidate-a-concomitant-behavioral-and-neuronal-study-of-adolescent-male-rats
#12
Tahseen Jalal Karim, Cruz Reyes-Vazquez, Nachum Dafny
Methylphenidate (MPD), also known as Ritalin, is a psychostimulant used to treat attention hyperactivity disorder. However, it is increasingly being misused by normal adolescents for recreation and academic advantage. Therefore, it is important to elucidate the behavioral and neurophysiological effects of MPD in normal subjects. MPD inhibits the reuptake of catecholamines, mainly found in the ventral tegmental area (VTA) and locus coeruleus (LC). The VTA and LC normally mediate attention, motivation, and drug reward behaviors...
June 14, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28612506/synergistic-interactions-between-corrosion-and-wear-at-titanium-based-dental-implant-connections-a-scoping-review
#13
REVIEW
K Apaza-Bedoya, M Tarce, C A M Benfatti, B Henriques, M T Mathew, W Teughels, J C M Souza
Two-piece implant systems are mainly used in oral implantology involving an osseointegrated implant connected to an abutment, which supports prosthetic structures. It is well documented that the presence of microgaps, biofilms and oral fluids at the implant-abutment connection can cause mechanical and biological complications. The aim of this review paper was to report the degradation at the implant-abutment connection by wear and corrosion processes taking place in the oral cavity. Most of the retrieved studies evaluated the wear and corrosion (tribocorrosion) of titanium-based materials used for implants and abutments in artificial saliva...
June 14, 2017: Journal of Periodontal Research
https://www.readbyqxmd.com/read/28611001/improvement-of-endothelial-progenitor-outgrowth-cell-epoc-mediated-vascularization-in-gelatin-based-hydrogels-through-pore-size-manipulation
#14
Jiayin Fu, Christian Wiraja, Hamizan B Muhammad, Chenjie Xu, Dong-An Wang
In addition to chemical compositions, physical properties of scaffolds, such as pore size, can also influence vascularization within the scaffolds. A larger pore has been shown to improve host vascular tissue invasion into scaffolds. However, the influence of pore sizes on vascularization by endothelial cells directly encapsulated in hydrogels remains unknown. In this study, micro-cavitary hydrogels with different pore sizes were created in gelatin-methacrylate hydrogels with dissolvable gelatin microspheres (MS) varying in sizes...
June 10, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28608839/microgroove-and-collagen-poly-%C3%AE%C2%B5-caprolactone-nanofiber-mesh-coating-improves-the-mechanical-stability-and-osseointegration-of-titanium-implants
#15
Morshed Khandaker, Shahram Riahinezhad, Wendy R Williams, Roman Wolf
The effect of depositing a collagen (CG)-poly-ε-caprolactone (PCL) nanofiber mesh (NFM) at the microgrooves of titanium (Ti) on the mechanical stability and osseointegration of the implant with bone was investigated using a rabbit model. Three groups of Ti samples were produced: control Ti samples where there were no microgrooves or CG-PCL NFM, groove Ti samples where microgrooves were machined on the circumference of Ti, and groove-NFM Ti samples where CG-PCL NFM was deposited on the machined microgrooves...
June 13, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28604223/soft-tissue-enhancement-combined-with-biologically-oriented-preparation-technique-bopt-to-correct-volumetric-bone-defects-a-clinical-case-report
#16
Davide Rancitelli, Pierpaolo Poli, Marco Cicciù, Francesco Lini, Rachele Roncucci, Gabriele Cervino, Carlo Maiorana
The aim of the present case report was to illustrate how to obtain an ideal alveolar ridge contour by means of peri-implant soft tissues management combined with the prosthetic approach of the biologically oriented preparation technique (BOPT). A patient presenting a moderate vertical and horizontal bone loss in the posterior maxilla was treated with sinus floor elevation and contextual implant placement. During the re-entry procedure, the horizontal defect was corrected with an apically repositioned flap combined with a connective tissue graft...
June 12, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/28599593/a-combined-experimental-and-finite-element-approach-to-analyse-the-fretting-mechanism-of-the-head-stem-taper-junction-in-total-hip-replacement
#17
Thom Bitter, Imran Khan, Tim Marriott, Elaine Lovelady, Nico Verdonschot, Dennis Janssen
Fretting corrosion at the taper interface of modular hip implants has been implicated as a possible cause of implant failure. This study was set up to gain more insight in the taper mechanics that lead to fretting corrosion. The objectives of this study therefore were (1) to select experimental loading conditions to reproduce clinically relevant fretting corrosion features observed in retrieved components, (2) to develop a finite element model consistent with the fretting experiments and (3) to apply more complicated loading conditions of activities of daily living to the finite element model to study the taper mechanics...
June 1, 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28591285/iris-claw-intraocular-lens-implantation-in-children-with-ectopia-lentis
#18
Sadık Görkem Çevik, Muhammer Özgür Çevik, Ahmet Tuncer Özmen
Purpose: Artisan iris-claw lens implantation (AICLI) is a surgical technique for treating ectopia lentis. We aimed to compare visual outcomes and possible long-term complications of AICLI surgery in pediatric patients with ectopia lentis with or without a diagnosable hereditary disease. Methods: Seventeen children with non-traumatic ectopia lentis were retros pectively classified into two groups: group 1 included children with a diagnosable hereditary disease (11 patients, 65%), and group 2 included children without any definable hereditary disease (six patients, 35%)...
March 2017: Arquivos Brasileiros de Oftalmologia
https://www.readbyqxmd.com/read/28584532/histological-and-histomorphometric-evaluation-of-the-synthetic-biomaterial-natix-%C3%A2-in-horizontal-reconstruction-of-alveolar-ridge
#19
Javad Mehrani Sabet, Babak Amoian, Maryam Seyedmajidi
BACKGROUND: Following loss of teeth, atrophy of alveolar ridge of the jaws is a substantial problem and unintended outcome that compels clinicians to perform bone reconstruction ahead of implant placement. Although autogenous bone is recommended as the gold standard in bone reconstruction, aninvasive second surgery harvestinga limited volume of bone (from intraoral source) has led a significant approachingthe use of synthetic bone substitute materials. The aim of this study was to evaluate the histologic and histomorphometric properties of porous titanium granules (Natix(®)) used in horizontal reconstruction of alveolar ridge before implant placement...
March 2017: Dental Research Journal
https://www.readbyqxmd.com/read/28576730/short-term-deep-brain-stimulation-of-the-thalamic-reticular-nucleus-modifies-aberrant-oscillatory-activity-in-a-neurodevelopment-model-of-schizophrenia
#20
Víctor Manuel Magdaleno-Madrigal, Gerardo Contreras-Murillo, Israel Camacho-Abrego, José Vicente Negrete-Díaz, Alejandro Valdés-Cruz, Rodrigo Fernández-Mas, Salvador Almazán-Alvarado, Gonzalo Flores
Dysfunction of thalamo-cortical networks involving particularly the thalamic reticular nucleus (TRN) is implicated in schizophrenia. In the neonatal ventral hippocampal lesion (NVHL), a heuristic animal model of schizophrenia, brain oscillation changes similar to those of schizophrenic patients have been reported. The aim of this study was to analyze the effects of short-term deep brain stimulation (DBS) in the thalamic reticular nucleus on electroencephalographic (EEG) activity in the NVHL. Male and female Sprague-Dawley rats were used and the model was prepared by excitotoxicity damage of the ventral hippocampus on postnatal day 7 (PD-7)...
May 31, 2017: Neuroscience
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