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https://www.readbyqxmd.com/read/28342371/contrast-enhancement-with-uranyl-acetate-allows-quantitative-analysis-of-the-articular-cartilage-by-microct-application-to-mandibular-condyles-in-the-btx-rat-model-of-disuse
#1
Jean-Daniel Kün-Darbois, Florence Manero, Louis Rony, Daniel Chappard
Microcomputed tomography (microCT) is well adapted to quantitative analysis of calcified tissues but soft tissues (such as cartilage) are radiolucent and need a contrast enhancement procedure for microCT. We developed a "staining" method allowing microCT imaging of articular cartilage using uranyl acetate (UA). The method was used to see whether adult rats with a botulinum toxin (BTX) injection in masticatory muscles present a change at the condylar cartilage of the mandible in association with a localized trabecular bone loss...
March 21, 2017: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/28326708/-evaluation-of-electromyogram-activity-and-masticatory-efficiency-in-edentulous-individuals-whose-maxillomandibular-horizontal-relationship-records-were-obtained-with-three-different-methods
#2
Liu Cuiling, Yang Liyuan, Zheng Zheng, Gao Xu
OBJECTIVE: This study was performed to investigate the electromyographic (EMG) activity of the masseter muscle and the anterior temporalis muscle, as well as the masticatory efficiency after insertion of the dentures in edentulous individuals whose maxillomandibular horizontal relationship records were obtained with three different methods. METHODS: Ten edentulous individuals were enrolled in this study. Three types of complete dentures for these 10 edentulous patients were made according to their different maxillomandibular horizontal relationship records...
October 1, 2016: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28317553/dietary-reconstruction-of-the-el-sidr%C3%A3-n-neandertal-familial-group%C3%A2-spain-in-the-context-of-other-neandertal-and-modern-hunter-gatherer-groups-a-molar-microwear-texture-analysis
#3
Almudena Estalrrich, Sireen El Zaatari, Antonio Rosas
Here, we present the analysis of occlusal molar microwear textures of eight individuals from the El Sidrón Neandertal group (Spain). The aims of the study were: 1) to document potential age-, sex-, and maternal lineage-related differences in diet within a Neandertal familial group, and 2) to place the diet of El Sidrón individuals in the context of those of other Neandertal groups. This study also offers an interpretation of the diet of the El Sidrón Neandertals by comparing their microwear signatures to those of recent hunter-gatherer populations with diverse but known diets...
March 2017: Journal of Human Evolution
https://www.readbyqxmd.com/read/28317439/patterns-of-cervical-and-masticatory-impairment-in-subgroups-of-people-with-temporomandibular-disorders-an-explorative-approach-based-on-factor-analysis
#4
Nikolaus Ballenberger, Harry von Piekartz, Mira Danzeisen, Toby Hall
OBJECTIVES: To identify clinical patterns of impairment affecting the cervical spine and masticatory systems in different subcategories of temporomandibular disorder (TMD) by an explorative data-driven approach. METHODS: For this observational study, 144 subjects were subdivided according to Research Diagnostic Criteria for TMDs into: Healthy controls, temporomandibular joint (TMJ) signs without symptoms, TMJ affected, temporomandibular muscles affected, or TMJ and muscles affected...
March 20, 2017: Cranio: the Journal of Craniomandibular Practice
https://www.readbyqxmd.com/read/28317243/implant-supported-mandibular-removable-partial-dentures-functional-clinical-and-radiographical-parameters-in-relation-to-implant-position
#5
Charlotte Jensen, Caroline M Speksnijder, Gerry M Raghoebar, Wouter Kerdijk, Henny J A Meijer, Marco S Cune
BACKGROUND: Patients with a Kennedy class I situation often encounter problems with their removable partial denture (RPD). PURPOSE: To assess the functional benefits of implant support to RPDs, the clinical performance of the implants and teeth and to determine the most favorable implant position: the premolar (PM) or molar (M) region. MATERIALS AND METHODS: Thirty subjects received 2 PM and 2 M implants. A new RPD was made. Implant support was provided 3 months later...
March 20, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28314397/effectiveness-of-botulinum-toxin-type-a-for-the-treatment-of-chronic-masticatory-myofascial-pain-a-case-series
#6
Jason S Baker, Patrick J Nolan
BACKGROUND: The aim of this study is to evaluate the effectiveness of botulinum toxin type A (BTX-A) for the treatment of chronic masticatory myofascial pain (MMP) over 12 months and to test a standardized protocol. METHODS: This is a prospective case series of consecutive adult patients with chronic MMP treated with injection of BTX-A into the bilateral temporalis and masseter muscles. The authors used the same anatomic landmarks and dosage and followed each patient for 12 months...
January 2017: Journal of the American Dental Association
https://www.readbyqxmd.com/read/28306134/further-evidence-of-a-prolonged-hypotensive-and-a-bradycardic-effect-after-mandibular-extension-in-normal-volunteers
#7
C Del Seppia, S Ghione, Paola Foresi, E Fommei, D Lapi, A Colantuoni, R Scuri
We previously reported that in normotensive humans submaximal mouth opening (mandibular extension) obtained by an ad hoc dilator (spring device), associated with partial masticatory movements and prolonged for 10 minutes is followed by a long-lasting reduction of blood pressure (BP) and heart rate (HR). Similar results were obtained by us in anesthetized rats. A recent independent study failed to confirm the results in the normotensive human. We reassessed, in 25 normotensive volunteers, the effects on BP and HR of mandibular extension obtained by the spring device associated with partial masticatory movements compared to a control procedure, consisting in keeping a tongue depressor between the incisor teeth...
December 1, 2016: Archives Italiennes de Biologie
https://www.readbyqxmd.com/read/28301687/effect-of-high-frequency-bio-oxidative-ozone-therapy-for-masticatory-muscle-pain-a-double-blind-randomized-clinical-trial
#8
Tamer Celakil, Almina Muric, Bilge Gokcen Roehlig, Gulumser Evlioglu, Haluk Keskin
OBJECTIVES: To evaluate the effect of bio-oxidative ozone application at the points of greatest pain in patients with chronic masticatory muscle pain. METHODS: A total number of 40 (40 women, with a mean age of 31.7) were selected after the diagnosis of myofacial pain dysfunction syndrome according to the Research Diagnostic Criteria for Temporomandibular Disorder (RDC/TMD). The patients were randomly divided into two groups; patients received the ozone therapy at the point of greatest pain, ozone group (n = 20); patients received the sham ozone therapy at the point of greatest pain, placebo group (n = 20)...
March 16, 2017: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/28294149/oral-health-in-relation-to-all-cause-mortality-the-ipc-cohort-study
#9
Margaux Adolph, Christelle Darnaud, Frédérique Thomas, Bruno Pannier, Nicolas Danchin, G David Batty, Philippe Bouchard
We evaluated the association between oral health and mortality. The study population comprised 76,188 subjects aged 16-89 years at recruitment. The mean follow-up time was 3.4 ± 2.4 years. Subjects with a personal medical history of cancer or cardiovascular disease and death by casualty were excluded from the analysis. A full-mouth clinical examination was performed in order to assess dental plaque, dental calculus and gingival inflammation. The number of teeth and functional masticatory units <5 were recorded...
March 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28291687/structural-biomechanics-of-the-craniomaxillofacial-skeleton-under-maximal-masticatory-loading-inferences-and-critical-analysis-based-on-a-validated-computational-model
#10
Amir R Pakdel, Cari M Whyne, Jeffrey A Fialkov
BACKGROUND: The trend towards optimizing stabilization of the craniomaxillofacial skeleton (CMFS) with the minimum amount of fixation required to achieve union, and away from maximizing rigidity, requires a quantitative understanding of craniomaxillofacial biomechanics. This study uses computational modeling to quantify the structural biomechanics of the CMFS under maximal physiologic masticatory loading. METHODS: Using an experimentally validated subject-specific finite element (FE) model of the CMFS, the patterns of stress and strain distribution as a result of physiological masticatory loading were calculated...
February 17, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28290229/incobotulinumtoxina-injection-for-temporomandibular-joint-disorder
#11
Amit A Patel, Michael Z Lerner, Andrew Blitzer
OBJECTIVES: Temporomandibular disorder (TMD) involves dysfunction of the temporomandibular joint and associated muscles of mastication causing pain with chewing, limitation of jaw movement, and pain. While the exact pathophysiology of TMD is not completely understood, it is thought that hyperfunction of the muscles of mastication places stress on the temporomandibular joint, leading to degeneration of the joint and associated symptoms. We hypothesize that chemodenervation of the muscles of mastication with IncobotulinumtoxinA (Xeomin) will decrease the stress on the temporomandibular joint and improve pain associated with temporomandibular joint and muscle disorder (TMJD)...
April 2017: Annals of Otology, Rhinology, and Laryngology
https://www.readbyqxmd.com/read/28286383/the-efficacy-of-platelets-rich-plasma-injection-in-the-superior-joint-space-of-the-tempromandibular-joint-guided-by-ultra-sound-in-patients-with-non-reducing-disk-displacement
#12
Ra'ed M Ayoub Al-Delayme, Shefaa H Alnuamy, Firas Taha Hamid, Tariq Jassim Azzamily, Salah AbdulMahdy Ismaeel, R Sammir, M Hadeel, Jafaar Nabeel, R Shwan, Shahad Jamal Alfalahi, Alaa Yasin
OBJECTIVE: The objective of this study was to determine average improvement during the rest and active mouth opening after ultrasound guided platelets rich plasma injection in the tempromandibular superior joint space for the patients complaining from non-reducing disk displacement. PATIENTS AND METHODS: Thirty-four patients with non-reducing disk displacement underwent guided ultrasound injection of platelet rich plasma to the upper joint space. The extent of maximal mouth opening, chewing efficiency, sound intensity of the TMJ, and tenderness of the TMJ and the masticatory muscles at rest, motion and mastication were thoroughly assessed at the beginning of the study and scheduled for next follow-up at 1st, 3rd, and 6th months...
March 2017: Journal of Maxillofacial and Oral Surgery
https://www.readbyqxmd.com/read/28279056/-effect-of-different-mechanical-loading-on-the-expression-of-notch-signaling-pathways-in-growing-rabbits-condylar-cartilage
#13
F Yan, J Y Feng, T C Mou, C Y Liu, Z Sun, C J Shi
Objective: To investigate the effect of different mechanical loading on the expression of Notch-1, Notch-3, Jagged-1 and Delta-like-1 in growing rabbits' condylar cartilage. Methods: Sixty-four ten-days-old rabbits were randomly divided into experimental and control groups. The rabbits in the experimental groups were fed on a powder diet, while the control groups were fed on a solid diet. The animals were sacrificed after 2, 4, 6 and 8 weeks. Notch-1, Notch-3, Jagged-1 and Delta-like-1 gene and protein expressions were examined by HE, immunohistochemistry, Western blotting and quantitative real-time PCR...
March 9, 2017: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
https://www.readbyqxmd.com/read/28274062/an-ingenious-modification-in-conventional-swing-lock-cast-partial-denture-for-rehabilitating-a-hemi-mandibulectomy-defect
#14
Rupal Jaydip Shah, Sanjay Balaji Lagdive, Shraddha Lalit Saini, Vishal Bipinbihari Verma, Satyaprakash Ranjit Shah
Mandibular resections compromise the balance and symmetry of mandibular functions. Since centuries there has been advent of various prosthetic treatment modalities to improve the masticatory efficiency. Swing lock dentures, a treatment facet with high degree of clinical effectiveness, yet gradually fading into oblivion due to its design complexities, has been resurrected by retaining its indigenous concept of reciprocation, and consolidating aesthetics with introduction of newer breed of aesthetic material (Thermoplastic Acetal resin)...
January 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28271438/short-term-follow-up-of-masticatory-adaptation-after-rehabilitation-with-an-immediately-loaded-implant-supported-prosthesis-a-pilot-assessment
#15
Mihoko Tanaka, Collaert Bruno, Reinhilde Jacobs, Tetsurou Torisu, Hiroshi Murata
BACKGROUND: When teeth are extracted, sensory function is decreased by a loss of periodontal ligament receptions. When replacing teeth by oral implants, one hopes to restore the sensory feedback pathway as such to allow for physiological implant integration and optimized oral function with implant-supported prostheses. What remains to be investigated is how to adapt to different oral rehabilitations. The purpose of this pilot study was to assess four aspects of masticatory adaptation after rehabilitation with an immediately loaded implant-supported prosthesis and to observe how each aspect will recover respectively...
December 2017: International Journal of Implant Dentistry
https://www.readbyqxmd.com/read/28271298/post-operative-orofacial-pain-temporomandibular-dysfunction-and-trigeminal-sensitivity-after-recent-pterional-craniotomy-preliminary-study
#16
Thiago Medina Brazoloto, Silvia Regina Dowgan Tesseroli de Siqueira, Pedro Augusto Sampaio Rocha-Filho, Eberval Gadelha Figueiredo, Manoel Jacobsen Teixeira, José Tadeu Tesseroli de Siqueira
BACKGROUND: Surgical trauma at the temporalis muscle is a potential cause of post-craniotomy headache and temporomandibular disorders (TMD). The aim of this study was to evaluate the prevalence of pain, masticatory dysfunction and trigeminal somatosensory abnormalities in patients who acquired aneurysms following pterional craniotomy. METHODS: Fifteen patients were evaluated before and after the surgical procedure by a trained dentist. The evaluation consisted of the (1) research diagnostic criteria for TMD, (2) a standardized orofacial pain questionnaire and (3) a systematic protocol for quantitative sensory testing (QST) for the trigeminal nerve...
March 7, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28267818/bruxism-is-there-an-indication-for-muscle-stretching-exercises
#17
Simone Gouw, Anton de Wijer, Nico Hj Creugers, Stanimira I Kalaykova
Bruxism is a common phenomenon involving repetitive activation of the masticatory muscles. Muscle-stretching exercises are a recommended part of several international guidelines for musculoskeletal disorders and may be effective in management of the jaw muscle activity that gives rise to bruxism. However, most studies of muscle-stretching exercises have mainly focused on their influence on performance (eg, range of motion, coordination, and muscle strength) of the limb or trunk muscles of healthy individuals or individuals with sports-related injuries...
March 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/28264377/rediscovery-and-redescription-of-i-laelaps-i-i-lignicola-i-g-amp-r-canestrini-a-remarkable-myrmecophilous-mite-of-the-genus-i-cosmolaelaps-i-berlese%C3%A2-acari-mesostigmata-laelapidae-from-italy
#18
Massimo Plumari, Omid Joharchi
Laelaps lignicola G. & R. Canestrini, 1882 is redescribed on the basis of numerous adults and deutonymphs, collected from Italy more than a century after its description. Despite its setiform setae without a discernible asymmetric swelling, this species fits the current concept of the genus Cosmolaelaps Berlese for all remaining diagnostic characters. Males of L. lignicola and Cosmolaelaps vacuus (Michael) share the presence of a basal process bearing seta av on telefemur II. This attribute is apparently not described in other laelapid mites...
February 15, 2017: Zootaxa
https://www.readbyqxmd.com/read/28258640/realistic-kinetic-loading-of-the-jaw-system-during-single-chewing-cycles-a-finite-element-study
#19
S E Martinez Choy, J Lenz, K Schweizerhof, M Schmitter, H J Schindler
Although knowledge of short-range kinetic interactions between antagonistic teeth during mastication is of essential importance for ensuring interference-free fixed dental reconstructions, little information is available. In this study, the forces on and displacements of the teeth during kinetic molar biting simulating the power stroke of a chewing cycle were investigated by use of a finite-element model that included all the essential components of the human masticatory system, including an elastic food bolus...
March 4, 2017: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/28256692/-orofacial-alterations-and-surface-electromyography-in-neurodevelopmental-disorders
#20
V Rosell-Clari
INTRODUCTION: Surface electromyography has become a widely used technique for measuring the activity of different muscle groups. Although the reliability and validity of the technique are discussed, there is an important body of scientific literature that defends the use of this technique. AIM: To present through a case study, the two basic uses of surface electromyography: the measurement of orofacial muscular activity and use it as biofeedback modulator of the muscular activity itself...
February 24, 2017: Revista de Neurologia
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