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https://www.readbyqxmd.com/read/28643919/mechanobehaviour-in-dolichofacial-and-brachyfacial-adolescents
#1
J C Nickel, A L Weber, P Covington Riddle, Y Liu, H Liu, L R Iwasaki
OBJECTIVES: To test whether mechanobehaviour (temporomandibular joint (TMJ) loads, jaw muscle use) was different between facial types and correlated with ramus height (Condylion-Gonion, mm). SETTING AND SAMPLE POPULATION: University of Missouri-Kansas City (UMKC) Orthodontic Clinic. Ten dolichofacial and ten brachyfacial adolescents (Sella-Nasion-Gonion-Gnathion (SN-GoGn) angles ≥37° and ≤27°, respectively) consented to participate. MATERIALS AND METHODS: Numerical models calculated TMJ loads for a range of static biting based on subjects' three-dimensional anatomy...
June 2017: Orthodontics & Craniofacial Research
https://www.readbyqxmd.com/read/28639343/first-case-of-anaphylaxis-after-botulinum-toxin-type-a-injection
#2
I J Moon, S E Chang, S D Kim
Botulinum toxin type A (BTA) (also known as onabotulinum toxin A) injection is widely used in the field of cosmetic dermatology. Although a few adverse events related to intramuscular BTA injection have been reported, no life-threatening adverse reaction has been documented to date. We report a case of anaphylaxis induced by intramuscular BTA injection into the masseter muscles of a 35-year-old woman. She had previously received injections of the identical BTA product into the same muscles without incident...
June 21, 2017: Clinical and Experimental Dermatology
https://www.readbyqxmd.com/read/28637996/the-localization-of-calcitonin-gene-related-peptide-in-the-human-trigeminal-ganglion-and-masseter-muscle
#3
Yuri Azuma, Iwao Sato
The localization of calcitonin gene-related peptide (CGRP) is similar to that of a neurotransmitter which indicates masticatory muscle pain in the area of the masseter fascia. CGRP is released from the trigeminal ganglion (TG). The aim of this study was to analyze the distribution of CGRP in the fascia of the masseter muscle (FMM) and TG in a morphometric manner, with respect to the location and density of CGRP-immunopositive reaction fiber (CGRP-IRF). A higher number of the CGRP-IRF were mainly found located around elongated blood vessels and small nerves on the origin side of the middle zone FMM in the O group (presented with occlusion)...
2017: Okajimas Folia Anatomica Japonica
https://www.readbyqxmd.com/read/28637983/repeatability-of-measurements-of-surface-electromyographic-variables-during-maximum-voluntary-contraction-of-temporalis-and-masseter-muscles-in-normal-adults
#4
Yeong-Gwan Im, Sang-Ho Han, Ji-Il Park, Hae-Soon Lim, Byung-Gook Kim, Jae-Hyung Kim
This study evaluated the intraexaminer repeatability of measurements of surface electromyography (EMG) variables and functional indices of the myoelectric signals from the masseter and temporalis muscles bilaterally in 15 healthy men. The test was repeated on two different days without templates. The resting muscle activity was recorded once, and two kinds of maximum voluntary contraction (MVC) tasks were performed and recorded three times. The two MVC tasks involved clenching the teeth and biting down on two cotton rolls bilaterally with the posterior teeth...
2017: Journal of Oral Science
https://www.readbyqxmd.com/read/28631164/studies-on-vertical-transmission-of-trichinella-spiralis-in-experimentally-infected-guinea-pigs-cavia-porcellus
#5
Eliana Riva, Cesar Fiel, Gisele Bernat, Sebastián Muchiut, Pedro Steffan
An experimental study to enhance knowledge on the capability of Trichenella spiralis to pass from guinea pigs to progeny at different periods of pregnancy or lactation was performed. For this purpose, 18 female adult guinea pigs were inoculated with 100 or 1000 T. spiralis muscle larvae (ML) during early, late gestation and during lactation period. The presence of T. spiralis (ML) in mothers and newborns was studied through enzymatic digestion from muscle samples. ML were observed in 9 of 42 newborn guinea pigs and levels of infection were significantly higher when infections of mothers were done during late gestation (p = 0...
June 19, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28622330/sensory-noise-predicts-divisive-reshaping-of-receptive-fields
#6
Matthew Chalk, Paul Masset, Boris Gutkin, Sophie Deneve
In order to respond reliably to specific features of their environment, sensory neurons need to integrate multiple incoming noisy signals. Crucially, they also need to compete for the interpretation of those signals with other neurons representing similar features. The form that this competition should take depends critically on the noise corrupting these signals. In this study we show that for the type of noise commonly observed in sensory systems, whose variance scales with the mean signal, sensory neurons should selectively divide their input signals by their predictions, suppressing ambiguous cues while amplifying others...
June 16, 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28617736/symmetry-restoration-at-rest-after-masseter-to-facial-nerve-transfer-is-it-as-efficient-as-smile-reanimation
#7
Gang Chen, Wenjin Wang, Wei Wang, Wei Ding, Xianxian Yang
BACKGROUND: Masseter-to-facial nerve transfer is a highly efficient technique for reanimating paralyzed muscle and has been reported to restore facial symmetry at rest. However, no systematic studies have been performed, and the effects of preoperative droop oral commissure on postoperative symmetry at rest have rarely been reported. METHODS: The authors retrospectively analyzed 35 patients with masseteric-facial nerve anastomosis and assessed the quality and quantity of the dynamic recovery and the oral commissure symmetry at rest...
June 14, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28615814/an-anatomical-study-for-localisation-of-zygomatic-branch-of-facial-nerve-and-masseteric-nerve-an-aid-to-nerve-coaptation-for-facial-reanimation-surgery-a-cadaver-based-study-in-eastern-india
#8
Ratnadeep Poddar, Alipta Bhattacharya, Iman Sinha, Asis Kumar Ghosal
CONTEXT: In cases of chronic facial palsy, where direct neurotisation is possible, ipsilateral masseteric nerve is a very suitable motor donor. We have tried to specifically locate the masseteric nerve for this purpose. AIMS: Describing an approach of localisation and exposure of both the zygomatic branch of Facial nerve and the nerve to masseter, with respect to a soft tissue reference point over face. SETTINGS AND DESIGN: Observational cross sectional study, conducted on 12 fresh cadavers...
January 2017: Indian Journal of Plastic Surgery: Official Publication of the Association of Plastic Surgeons of India
https://www.readbyqxmd.com/read/28614767/changes-in-caveolin-1-caveolin-3-and-vascular-endothelial-growth-factor-expression-and-protein-content-after-botulinum-toxin-a-injection-in-the-right-masseter-muscle-of-dystrophin-deficient-mdx-mice
#9
U U Botzenhart, V Vaal, I Rentzsch, T Gredes, T Gedrange, C Kunert-Keil
Progressive muscle wasting, frequently associated with inflammation, muscle fibre degeneration and fibrosis, is a characteristic of DMD (Duchenne muscular dystrophy). Its most common used animal model, the mdx mouse, however can overcome muscle degeneration by regeneration processes and is for this reason not suitable to answer all scientific questions. The aim of this study was to evaluate the ability of botulinum toxin A (BTX-A) in breaking down muscle regeneration in mdx mice. For this purpose, the right masseter muscle of 100 days old mdx and healthy mice was paralyzed by a single specific intramuscular injection of BTX-A...
April 2017: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/28611725/multiparameter-electromyography-analysis-of-the-masticatory-muscle-activities-in-patients-with-brainstem-stroke-at-different-head-positions
#10
Chuyao Jian, Miaoluan Wei, Jie Luo, Jiayin Lin, Wen Zeng, Weitian Huang, Rong Song
The performance of the masticatory muscle is frequently affected and presents high heterogeneity poststroke. Surface electromyography (EMG) is widely used to quantify muscle movement patterns. However, only a few studies applied EMG analysis on the research of masticatory muscle activities poststroke, and most of which used single parameter-root mean squares (RMS). The aim of this study was to fully investigate the performance of masticatory muscle at different head positions in healthy subjects and brainstem stroke patients with multiparameter EMG analysis...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28606421/spontaneous-jaw-muscle-activity-in-patients-with-acquired-brain-injuries-preliminary-findings
#11
Mohit Kothari, Vibeke Louise Funch Madsen, Eduardo E Castrillon, Jørgen Feldbæk Nielsen, Peter Svensson
PATIENTS: High or excessive parafunctional jaw muscle activity is a frequent complication of acquired brain injury (ABI) and may have some similarities to bruxism. Bruxism has been associated with increased tooth wear, masseter hypertrophy and headaches. The aim of this observational study was to identify the levels of jaw muscle activity from fourteen ABI patients having different functional and cognitive levels in their early phase of neurological rehabilitation (according to their Ranchos Los Amigos Scale (RLAS) score)...
June 9, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28603361/validity-of-using-multi-frequency-bioelectrical-impedance-analysis-to-measure-skeletal-muscle-mass-in-preschool-children
#12
Kanako Fujii, Akiko Ishizaki, Ayano Ogawa, Takuya Asami, Hyosong Kwon, Akinobu Tanaka, Noboru Sekiya, Shouji Hironaka
[Purposes] Although it is recommended to develop a habit of physical activities, there is no easy way to measure skeletal muscle mass in preschool children, which cause the difficulty of evaluation. The purpose of this study was to examine the validity of body composition including the skeletal muscle mass assessment using multi-frequency bioelectrical impedance analysis by comparing body fat mass obtained by using multi-frequency bioelectrical impedance analysis method and body mass index formulas. [Subjects and Methods] Ninety-four children were surveyed for age, height, weight, grip strength, maximum occlusal force, thickness of muscle and fat mass (masseter and lower limb), body fat mass, skeletal muscle mass, and calf circumference...
May 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28602137/immediate-and-short-term-effects-of-phototherapy-on-pain-muscle-activity-and-joint-mobility-in-women-with-temporomandibular-disorder-a-randomized-double-blind-placebo-controlled-clinical-trial
#13
Carolina Marciela Herpich, Ernesto Cesar Pinto Leal-Junior, Cid Andre Fidelis de Paula Gomes, Igor Phillip Dos Santos Gloria, Ana Paula Amaral, Maitê de Freitas de Rocha Souza Amaral, Fabiano Politti, Daniela Aparecida Biasotto-Gonzalez
OBJECTIVES: The aim of the present study was to evaluate the immediate and short-term effects of phototherapy on pain intensity, the pressure pain threshold (PPT), maximum vertical mandibular movement, and the electrical activity of the masseter and temporal muscles in women with temporomandibular disorder (TMD). METHODS: Sixty women were randomly allocated to four different groups and submitted to phototherapy with a combination of super-pulsed laser (905 nm), red (640 nm), and infrared (875 nm) light emitting diodes in the same equipment on the masseter (three points) and temporal (two points) muscles bilaterally in a single session...
June 11, 2017: Disability and Rehabilitation
https://www.readbyqxmd.com/read/28598184/surface-electromyography-before-and-after-orthognathic-surgery-and-condylectomy-in-active-laterognathia-a-case-report
#14
F Cullati, A Mapelli, G Beltramini, M Codari, C L Pimenta Ferreira, A Baj, A B Giannì, C Sforza
BACKGROUND: Condylar hyperplasia is a rare bone disease characterised by excessive development of mandibular condyle, which can lead to the development of asymmetric facial deformity together with malocclusion, mandibular deviation, TMJ and masticatory musculoskeletal system dysfunction. There is not a treatment protocol universally accepted. In order to determine the correct management, treatment and intervention timing of these patients, morphological examinations should be coupled with functional assessments...
June 2017: European Journal of Paediatric Dentistry: Official Journal of European Academy of Paediatric Dentistry
https://www.readbyqxmd.com/read/28597323/stent-induced-flow-disturbances-in-the-ipsilateral-external-carotid-artery-following-internal-carotid-artery-stenting-a%C3%A2-temporary-cause-of-jaw-claudication
#15
Georgiana-Aura Giurgea, Markus Haumer, Irene Mlekusch, Schila Sabeti-Sandor, Petra Dick, Martin Schillinger, Erich Minar, Wolfgang Mlekusch
BACKGROUND: We hypothesize that stenting of the internal carotid artery can immediately impede blood flow to the external carotid artery by either plaque shift or stent coverage of the ostium, and thereby cause ischemic symptoms like ipsilateral jaw claudication. METHODS: Thirty-three patients with high-grade asymptomatic stenosis of the internal carotid artery who underwent endovascular treatment were examined by ultrasound of the external carotid artery and performed an exercise test by chewing chewing gum synchronously to an electronic metronome for 3 min...
June 9, 2017: Wiener Klinische Wochenschrift
https://www.readbyqxmd.com/read/28592599/modeled-dietary-impact-of-industry-wide-food-and-beverage-reformulations-in-the-united-states-and-france
#16
Mathilde Gressier, Lisa Privet, Kevin Clark Mathias, Antonis Vlassopoulos, Florent Vieux, Gabriel Masset
Background: Food reformulation has been identified as a strategy to improve nutritional intakes; however, little is known about the potential impact of industry-wide reformulations.Objective: The aim of the study was to model the dietary impact of food and beverage reformulation following the Nestlé Nutritional Profiling System (NNPS) standards for children, adolescents, and adults in the United States and France.Design: Dietary intakes of individuals aged ≥4 y were retrieved from nationally representative surveys: the US NHANES 2011-2012 (n = 7456) and the French Individual and National Survey on Food Consumption (n = 3330)...
June 7, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28591339/oral-motor-and-electromyographic-characterization-of-adults-with-facial-fractures-a-comparison-between-different-fracture-severities
#17
Amanda Pagliotto da Silva, Fernanda Chiarion Sassi, Endrigo Bastos, Nivaldo Alonso, Claudia Regina Furquim de Andrade
OBJECTIVES: To characterize the oral motor system of adults with facial injuries and to compare the oral motor performance/function between two different groups. METHODS: An observational, descriptive, cross-sectional study was conducted in 38 patients presenting with facial trauma who were assigned to the Division of Orofacial Myology of a Brazilian School Hospital. Patients were divided into two groups: Group 1 (G1) consisted of 19 patients who were submitted to open reduction of at least one facial fracture, and Group 2 (G2) consisted of 19 individuals who were submitted to closed fracture reduction with maxillomandibular fixation...
May 2017: Clinics
https://www.readbyqxmd.com/read/28590396/botulinum-toxin-conjugated-with-silk-fibroin-and-4-hexylresorcinol
#18
You-Young Jo, Seong-Gon Kim, Min-Keun Kim
PURPOSE: The objective of this study was to evaluate whether silk fibroin (SF) incorporated into 4-hexylresorcinol (4HR) could increase botulinum toxin-A (BTX-A) activity. MATERIAL AND METHODS: In total, 30 rats were used for this study. The animals were divided into 6 groups according to the injected materials (SA: saline only; SF; 4HR; B2: 2 units of BTX-A; B2 + SF + 4HR: combination of B2, SF, and 4HR; B5: 5 units of BTX-A). Serial sonography was used for the evaluation of muscle thickness after injection...
June 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28585258/masticatory-muscle-architecture-in-a-water-rat-from-australasia-murinae-hydromys-and-its-implication-for-the-evolution-of-carnivory-in-rodents
#19
P-H Fabre, A Herrel, Y Fitriana, L Meslin, L Hautier
Murines are well known for their generalist diet, but several of them display specializations towards a carnivorous diet such as the amphibious Indo-Pacific water-rats. Despite the fact that carnivory evolved repeatedly in this group, few studies have investigated associated changes in jaw muscle anatomy and biomechanics. Here, we describe the jaw muscles and cranial anatomy of a carnivorous water-rat, Hydromys chrysogaster. The architecture of the jaw musculature of six specimens captured both on Obi and Papua were studied and described using dissections...
June 6, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28571176/juvenile-nasopharyngeal-angiofibroma-a-case-report
#20
Soubhagini Acharya, Choubarga Naik, Siddharth Panditray, Subha Soumya Dany
Juvenile nasopharyngeal angiofibroma is tumour almost exclusively seen in adolescent males, constituting less than 1% of all neoplasms in head and neck. They are benign and locally spreading and are highly vascular in nature and thus prove to be a surgical challenge because of its complex anatomical location. Here, we present a case report of a 18-year-old male presenting with a mass in his left nasal cavity, with recurrent epistaxis and nasal obstruction. Computed tomography imaging revealed a non-encapsulated lobulated heterogeneous mass lesion in the naso-pharynx and left posterior choana of the nasal cavity, extending to pterygopalatine and infratemporal fossa, masseter space of left side...
April 2017: Journal of Clinical and Diagnostic Research: JCDR
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