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https://www.readbyqxmd.com/read/29145524/tumor-necrosis-factor-alpha-signaling-in-trigeminal-ganglion-contributes-to-mechanical-hypersensitivity-in-masseter-muscle-during-temporomandibular-joint-inflammation
#1
Reio Ito, Masamichi Shinoda, Kuniya Honda, Kentaro Urata, Jun Lee, Mitsuru Maruno, Kumi Soma, Shinji Okada, Nobuhito Gionhaku, Koichi Iwata
AIMS: To determine the involvement of tumor necrosis factor alpha (TNFα) signaling in the trigeminal ganglion (TG) in the mechanical hypersensitivity of the masseter muscle during temporomandibular joint (TMJ) inflammation. METHODS: A total of 55 male Sprague-Dawley rats were used. Following injection of Complete Freund's Adjuvant into the TMJ, the mechanical sensitivities of the masseter muscle and the overlying facial skin were measured. Satellite glial cell (SGC) activation and TNFα expression in the TG were investigated immunohistochemically, and the effects of their inhibition on the mechanical hypersensitivity of the masseter muscle were also examined...
November 16, 2017: Journal of Oral & Facial Pain and Headache
https://www.readbyqxmd.com/read/29137581/evidence-of-malignant-hyperthermia-in-patients-administered-triggering-agents-before-malignant-hyperthermia-susceptibility-identified-missed-opportunities-prior-to-diagnosis
#2
T Y Chan, T F Bulger, K M Stowell, R L Gillies, E E Langton, N E Street, N A Pollock
Malignant hyperthermia (MH) is a hypermetabolic disorder of skeletal muscle triggered almost exclusively by potent inhalational agents and suxamethonium. Signs of an MH reaction are non-specific and may be confused with the presentation of other problems such as sepsis and overheating of a patient. A high index of suspicion is needed to be aware of an early presentation of MH. Nine patients are presented who showed abnormal signs with an earlier anaesthetic where the possible diagnosis of an MH reaction was missed...
November 2017: Anaesthesia and Intensive Care
https://www.readbyqxmd.com/read/29133965/evaluation-of-adjunctive-effect-of-low-level-laser-therapy-on-pain-swelling-and-trismus-after-surgical-removal-of-impacted-lower-third-molar-a-double-blind-randomized-clinical-trial
#3
Farrokh Farhadi, Hosein Eslami, Alireza Majidi, Vahid Fakhrzadeh, Milad Ghanizadeh, Sahar KhademNeghad
Background and Aim: Wisdom teeth remains impacted in the jaw due to several reasons and surgery of impacted wisdom teeth is one of the most common surgeries in dental clinics. Pain, swelling and trismus are the common complications after this surgery which affect quality of life. In articles, various methods are introduced to control immediate inflammatory-response associated with third-molar surgery. The aim of this study is to evaluate the adjunctive effect of low-level laser Therapy on pain, swelling and trismus after surgical removal of impacted lower third molar...
September 30, 2017: Laser Therapy
https://www.readbyqxmd.com/read/29133297/evaluating-the-triplet-hypothesis-during-rhythmic-mastication-in-primates
#4
Yashesvini Ram, Callum F Ross
Mammalian mastication involves precise jaw movements including transverse movement of the mandible during the power stroke. Jaw elevation and transverse movement are driven by asymmetrical jaw elevator muscle activity which is thought to include a phylogenetically primitive and conserved triplet motor pattern consisting of: triplet I-balancing side superficial masseter and medial pterygoid, working side posterior temporalis- which reaches onset, peak, and offset first; and triplet II-working side superficial masseter and medial pterygoid, balancing side posterior temporalis-which is active second...
November 13, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29126811/properties-of-tonic-episodes-of-masseter-muscle-activity-during-waking-hours-and-sleep-in-subjects-with-and-without-history-of-orofacial-pain
#5
Acing Habibie Mude, Shigehisa Kawakami, Seiya Kato, Shogo Minagi
PURPOSE: To provide a scientific data related to the tonic activity of masseter muscle in subjects with and without history of orofacial pain during their normal daily life. METHODS: Thirty-three subjects were divided into two groups, a pain history group (PHG) and a non-pain history group (non-PHG), based on their responses to the Research Diagnostic Criteria for Temporomandibular Disorders questionnaire. After excluding four subjects with incomplete recordings, full-day masseter muscle surface EMGs of 29 subjects (10 men, 19 women; mean age 24...
November 7, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/29123626/treatment-of-hemifacial-spasm-in-patient-with-hemifacial-atrophy-using-combination-therapy-ultrasound-therapy-and-tens-a-case-report
#6
Apala Baduni, Bhuvana Krishnamoorthy
A 19-year-old male patient presented with facial hemi-atrophy with unilateral spasms of the masseter and temporalis muscles. Ultrasound therapy and Transcutaneous Electric Nerve Stimulation therapy, known as combination therapy, were given on alternate days for 2 weeks. At the end of 2 weeks of combination therapy the patient reported a drastic reduction in the number of episodes of muscle spasm. The visual analog scale score for tenderness of the masseter and temporalis was also markedly reduced. No one has previously used combination therapy for the treatment of facial hemi-atrophy with hemi-facial spasms...
October 2017: Korean Journal of Pain
https://www.readbyqxmd.com/read/29118958/treatment-of-chronic-pain-associated-with-bruxism-through-myofunctional-therapy
#7
Giuseppe Messina, Francesco Martines, Ewan Thomas, Pietro Salvago, Giovanni Battista Menchini Fabris, Luciano Poli, Angelo Iovane
Temporomandibular disorders such as bruxism may cause painful clinical conditions and over time lead to chronic facial pain. A combination of therapeutic strategies that are usually undertaken by dentists and gnathologists to reduce bruxism episodes and consequently pain, are myofunctional therapy, pharmacological treatment, intraoral interventions and behavioural treatments. The aim of this work was to understand if myofuntional therapy alone can be a useful therapy for the reduction of chronic facial pain...
June 27, 2017: European Journal of Translational Myology
https://www.readbyqxmd.com/read/29117291/does-botulinum-toxin-injection-into-masseter-muscles-affect-subcutaneous-thickness
#8
Gunwoo Park, Young-Chan Choi, Jung-Hee Bae, Seong-Taek Kim
Background: Botulinum toxin (BoNT) is widely used to treat masseter muscle hypertrophy. Changes in the muscle thickness have been found in many studies, but there has been no report on changes in the thickness from the skin surface to the masseter muscle. Objectives: We aimed to use ultrasonography to measure not only changes in the muscle thickness but also changes in subcutaneous thickness. Methods: This study enrolled 20 volunteer patients: 10 were assigned to an experimental group (injected with each side 25 U of botulinum toxin into both masseter muscles) and 10 to a control group (injected with normal saline)...
June 21, 2017: Aesthetic Surgery Journal
https://www.readbyqxmd.com/read/29110188/percutaneous-balloon-compression-for-persistent-or-recurrent-trigeminal-neuralgia-after-microvascular-decompression-personal-experience-of-28-patients
#9
Wu Xu, Chengrong Jiang, Chen Yu, Weibang Liang
The objective of this study is to investigate the long-term effects of percutaneous balloon compression (PBC) for treating persistent or recurrent trigeminal neuralgia (TN) after microvascular decompression (MVD). The clinical features, surgical findings, outcomes, and complications of 28 patients underwent PBC for TN in Nanjing Drum Tower Hospital between April 2011 and March 2015 were analyzed retrospectively. All the patients had received MVD before but they did not get cured or the symptom relapsed during follow-up...
November 6, 2017: Acta Neurologica Belgica
https://www.readbyqxmd.com/read/29109846/new-management-in-bilateral-masseter-muscle-hypertrophy
#10
REVIEW
Gabriele Bocchialini, Andrea Castellani, Stefano Negrini, Alessandro Rossi
Bilateral masseter muscle hypertrophy is an alteration in shape and thickness of the masseter muscles that can modify the width of the lower face causing aesthetic and functional problems. A 21-year-old man was referred to the Department of Maxillofacial Surgery at the Civil Hospital in Brescia by his dentist for an evaluation of his facial appearance with a square-face type. To reduce the undesirable facial appearance, a surgical intraoral approach was performed; the procedure includes the bilateral dissection of the masseter muscle, partial lipectomy, and the ostectomy of the mandibular angle assisted by a surgical guide built on a stereolithographic model...
December 2017: Craniomaxillofacial Trauma & Reconstruction
https://www.readbyqxmd.com/read/29105170/influence-of-glutamate-evoked-pain-and-sustained-elevated-muscle-activity-on-blood-oxygenation-in-the-human-masseter-muscle
#11
Shunichi Suzuki, Taro Arima, Yoshimasa Kitagawa, Peter Svensson, Eduardo Castrillon
This study aimed to investigate the effect of glutamate-evoked masseter muscle pain on intramuscular oxygenation during rest and sustained elevated muscle activity (SEMA). Seventeen healthy individuals participated in two sessions in which they were injected with glutamate and saline in random order. Each session was divided into three, 10-min periods. During the first (period 1) and the last (period 3) 10-min periods, participants performed five intercalated 1-min bouts of masseter SEMA with 1-min periods of 'rest'...
November 3, 2017: European Journal of Oral Sciences
https://www.readbyqxmd.com/read/29098397/modification-of-masticatory-rhythmicity-leading-to-the-initiation-of-the-swallowing-reflex-in-humans
#12
Masaki Yoneda, Kazuya Saitoh
Modification of movements by proprioceptive feedback during mastication has an important role in shifting from the oral to the pharyngeal phase of swallowing. The aim of this study was to investigate the kinetics of masticatory muscles throughout a sequence of oropharyngeal swallowing and to present a hypothetical model of the involvement of the nervous system in the transition from mastication to the swallowing reflex. Surface electromyographic signals were recorded from the jaw-closing masseter muscles and the jaw-opening suprahyoid muscle group when a piece of bread (3-5 g) was ingested...
November 2, 2017: Dysphagia
https://www.readbyqxmd.com/read/29074703/durophagous-biting-in-sea-otters-enhydra-lutris-differs-kinematically-from-raptorial-biting-of-other-marine-mammals
#13
Lori L Timm-Davis, Randall W Davis, Christopher D Marshall
Sea otters represent an interesting model for studies of mammalian feeding evolution. Although they are marine mammals, sea otters returned to the sea relatively recently and feed at the surface. Therefore, they represent a transitional stage of aquatic adaptation. Currently no feeding performance studies of sea otters have been conducted. The main objective of this study was to characterize the feeding kinematic profile in sea otters. It was hypothesized that sea otters would exhibit a terrestrial feeding behavior and that they forcefully crush hard prey at large gapes...
October 26, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29065815/management-of-pain-in-tmd-patients-bio-oxidative-ozone-therapy-versus-occlusal-splints
#14
Tamer Celakil, Almina Muric, Bilge Gökcen Roehlig, Gulumser Evlioglu
OBJECTIVE: To compare the effects of bio-oxidative ozone application with occlusal splints in temporomandibular disorder (TMD) patients with pain. METHODS: Forty participants were selected after the diagnosis of TMD and randomly divided into two groups: ozone group (OG, n = 20) and occlusal splint group (OCSG, n = 20). Ozone was applied to patients three times per week, for a total of six sessions. Patients in the OCSG were instructed to use occlusal splints every night over a period of four weeks...
October 24, 2017: Cranio: the Journal of Craniomandibular Practice
https://www.readbyqxmd.com/read/29064802/functional-condition-of-masseters-muscles-of-patients-with-class-subdivision
#15
Vera D Kuroyedova, Alexandra N Makarova, Tatyana A Chicor
INTRODUCTION: Main functional characteristics of masticator muscles in patients with class ?? malocclusions is activity dominance of m. temporalis in comparison with m. ?asseter. We have not found datum about functional status of the masticators in patients with class II subdivision. THE AIM: The purpose of our study was to investigate the functional characteristics of m. ?asseter, m. temporalis in adult patients with class II subdivision malocclusion. MATERIALS AND METHODS: There have been carried out the surface electromyographic study of m...
2017: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29062480/in-hospital-surgical-treatment-for-haemorrhage-after-aesthetic-mandibular-osteotomy-performed-as-an-office-based-day-surgery-a-case-report
#16
Kosuke Kanke, Takahiro Abe, Masanobu Abe, Yoshiyuki Mori, Kazuto Hoshi, Tsuyoshi Takato
In East Asia, a square face is considered unattractive, and mandibular contouring surgery is commonly used to give a smooth contour to the lower jaw. Mandibular contouring surgery occasionally involves not only osteotomy of the mandibular angle but also resection of the masseter muscle via an intraoral approach. This type of mandibular contouring surgery poses a risk of injury to the premasseteric branch of the facial artery and massive haemorrhage. Here we report a patient who presented to our hospital with severe haemorrhage, swelling and airway constriction after bilateral mandibular angle and plane osteotomy with resection of the masseter muscle performed elsewhere as an office-based day surgery...
December 2017: Annals of Medicine and Surgery
https://www.readbyqxmd.com/read/29061384/motoneuron-degeneration-in-the-trigeminal-motor-nucleus-innervating-the-masseter-muscle-in-dystonia-musculorum-mice
#17
M Ibrahim Hossain, Masao Horie, Nozomu Yoshioka, Masayuki Kurose, Kensuke Yamamura, Hirohide Takebayashi
Dystonia musculorum (dt) mice, which have a mutation in the Dystonin (Dst) gene, are used as animal models to investigate the human disease known as hereditary sensory and autonomic neuropathy type VI. Massive neuronal cell death is observed, mainly in the peripheral nervous system (PNS) of dt mice. We and others have recently reported a histopathological feature of these mice that neurofilament (NF) accumulates in various areas of the central nervous system (CNS), including motor pathways. Although dt mice show motor disorder and growth retardation, the causes for these are still unknown...
October 20, 2017: Neurochemistry International
https://www.readbyqxmd.com/read/29057333/a-magnetic-resonance-imaging-based-approach-to-quantify-radiation-induced-normal-tissue-injuries-applied-to-trismus-in-head-and-neck-cancer
#18
Maria Thor, Neelam Tyagi, Vaios Hatzoglou, Aditya Apte, Ziad Saleh, Nadeem Riaz, Nancy Y Lee, Joseph O Deasy
BACKGROUND AND PURPOSE: In this study we investigated the ability of textures from T1-weighted MRI scans post-contrast (T1wpost) to identify the critical muscle(s) for radiation-induced trismus. MATERIALS AND METHODS: The study included ten cases (Trismus: ≥Grade 1), and ten age-sex-tumor-location-and-stage-matched controls treated with intensity-modulated radiotherapy to 70Gy@2.12Gy in 2005-2009. Trismus status and T1wPost were conducted within one year post-radiotherapy...
January 2017: Phys Imaging Radiat Oncol
https://www.readbyqxmd.com/read/29055645/bite-force-and-electromyography-evaluation-after-cranioplasty-in-patients-with-craniosynostosis
#19
Markus Martini, Valentin Wiedemeyer, Nils Heim, Martina Messing-Jünger, Sabine Linsen
OBJECTIVE: This long-term follow-up investigation aimed to assess masticatory muscle function in 15 patients with craniosynostosis with detachment of the temporal muscle during fronto-orbital advancement 6 years after cranioplasty compared with a non-operative stomatognathic healthy cohort in the same age group (n = 25). STUDY DESIGN: The follow-up assessment for the operated children occurred on average 5.2 ± 1.7 years after surgery at the age of 7 ± 1...
September 21, 2017: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/29053659/impact-of-temporomandibular-disorders-on-the-stomatognathic-system-in-children
#20
K-V Díaz-Serrano, T-M Dias, P Vasconcelos, L-G Sousa, S Siéssere, S Regalo, M Palinkas
BACKGROUND: To evaluate the EMG activity and thickness of right masseter (RM), left masseter (LM), right temporal (RT) and left temporal (LT) muscles and bite force in children with temporomandibular disorders (TMD). MATERIAL AND METHODS: Forty five children (mean age 8.8 years; 22 boys and 23 girls) were examined on the basis of the RDC/TMD and the Faces Pain Scale-Revised (FPS-R) was used to determine the level of severity of the signs and symptoms of TMD, resulting in four groups: GI - without TMD (n=10); GII - with mild TMD (n=18), GIII: with moderate TMD (n=12) and GIV: with severe TMD (n=5)...
November 1, 2017: Medicina Oral, Patología Oral y Cirugía Bucal
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