The Experts below are selected from a list of 261 Experts worldwide ranked by ideXlab platform
Fabiano Politti - One of the best experts on this subject based on the ideXlab platform.
-
Administration of low-level laser on Muscles of Mastication following the induction of initial fatigue: protocol for a randomized, controlled, clinical trial.
Medicine, 2018Co-Authors: Greice De Brito Bitencourt, Fabiano Politti, Marcela Leticia Leal Gonçalves, Fernanda Yukie Kobayashi, Lara Jansiski Motta, Daniela Fátima Teixeira Da Silva, Leandro Paulino Feliciano, Raquel Agnelli Mesquita-ferrari, Kristianne Porta Santos Fernandes, Sandra Kalil BussadoriAbstract:Background Orofacial pain encompasses painful conditions, such as temporomandibular disorder (TMD). Multidisciplinary health teams seek to control such musculoskeletal disorders to improve the quality and functional capacity of the Muscles of Mastication. The aim of the proposed study is to evaluate the effect of low-level laser therapy as a form of treatment for the prevention of initial fatigue of the Muscles of Mastication (masseter and anterior temporal Muscles) as well as the recovery of these Muscles after induced exhaustion (caused by isometric contraction) in young adults. Methods The participants will be 78 healthy male and female volunteers between 18 and 34 years of age. The volunteers will be randomly allocated to a laser group (n = 26), sham group (n = 26), and control group (n = 26). All participants will be submitted to a clinical evaluation to record mandibular movements, bite force, muscle sensitivity to palpation, and initial muscle fatigue. Initial fatigue will be induced by isometric contraction of the jaws. Maximum voluntary contraction will be performed to record the time until initial exhaustion of the masseter muscle (determined by electromyography). The groups will then be submitted to the interventions: active laser therapy (wavelength: 780 nm; fluence: 134 J/cm; power: 50 mW; irradiance: 1.675 W/cm; exposure time: 80 seconds per point) on 3 points of the masseter and 1 point on the anterior temporal Muscles on each side; sham laser (placebo effect); or no intervention (control). Maximum voluntary contraction will be performed again after the interventions to record the time until initial exhaustion of the masseter muscle (determined by electromyography). Differences in individual time until exhaustion between the pre- and postintervention evaluations will be measured to determine the effect of low-level laser therapy. Discussion Although studies have been made with the use of low-level laser therapy in TMDs and on the effect of photobiomodulation on fatigue, this the first study to test this therapy in the prevention of fatigue in this region. The clinical relevance lies in the fact that longer dental procedures could take place if the patients are less prone to fatigue.
-
Effect of mandibular mobilization on electromyographic signals in Muscles of Mastication and static balance in individuals with temporomandibular disorder: study protocol for a randomized controlled trial
Trials, 2013Co-Authors: Yasmin El Hage, Fabiano Politti, Dowglas F Magalhães De Sousa, Carolina Marciela Herpich, Igor Phillip Dos Santos Gloria, Cid André Fidelis De Paula Gomes, Ana Paula Amaral, Nívea Cristina De Melo, Thais Correa Da Silva, Eric Edmur Camargo ArrudaAbstract:Background The stomatognathic system and dysfunction in this system may be related to postural control. The proposal of the present study is to assess the effect of mandibular mobilization in individuals with temporomandibular disorder using surface electromyography of the Muscles of Mastication and stabilometric variables. Methods/Design A randomized, controlled, blind, clinical trial will be carried out, with the participants divided into three groups: 1) facial massage therapy (control group), 2) nonspecific mandibular mobilization and 3) specific mandibular mobilization. All groups will be assessed before and after treatment using the Research Diagnostic Criteria for Temporomandibular Disorders, surface electromyography of the masseter and temporal Muscles and stabilometry. This study is registered with the Brazilian Registry of Clinical Trials (RBR9x8ssz). Discussion A large number of studies have employed surface electromyography to investigate the function/dysfunction of the Muscles of Mastication and associations with signs and symptoms of temporomandibular disorders. However, it has not yet been determined whether stabilometric variables offer adequate reliability in patients with this disorder. The results of the proposed study will help determine whether specific and/or nonspecific mandibular mobilization exerts an effect on the Muscles of Mastication and postural control. Moreover, if an effect is detected, the methodology defined in the proposed study will allow identifying whether the effect is local (found only in the Muscles of Mastication), global (found only in postural control) or generalized.
-
Effect of mandibular mobilization on electromyographic signals in Muscles of Mastication and static balance in individuals with temporomandibular disorder: study protocol for a randomized controlled trial
Trials, 2013Co-Authors: Yasmin El Hage, Fabiano Politti, Dowglas F Magalhães De Sousa, Carolina Marciela Herpich, Igor Phillip Dos Santos Gloria, Ana Paula Amaral, Nívea Cristina De Melo, Thais Correa Da Silva, Cid André Fidelis De Paula Gomes, Eric Edmur Camargo ArrudaAbstract:Background The stomatognathic system and dysfunction in this system may be related to postural control. The proposal of the present study is to assess the effect of mandibular mobilization in individuals with temporomandibular disorder using surface electromyography of the Muscles of Mastication and stabilometric variables.
Wieslaw L. Nowinski - One of the best experts on this subject based on the ideXlab platform.
-
Segmentation of the temporalis muscle from MR data
International Journal of Computer Assisted Radiology and Surgery, 2007Co-Authors: Hsiao Piau Ng, Qingmao Hu, Kelvin Weng Chiong Foong, Wieslaw L. NowinskiAbstract:Objective A method for segmenting the temporalis from magnetic resonance (MR) images was developed and tested. The temporalis muscle is one of the Muscles of Mastication which plays a major role in the Mastication system.
-
Muscles of Mastication model-based MR image segmentation
International Journal of Computer Assisted Radiology and Surgery, 2006Co-Authors: S. H. Ong, Kelvin Weng Chiong Foong, P. S. Goh, Wieslaw L. NowinskiAbstract:Objective The Muscles of Mastication play a major role in the orodigestive system as the principal motive force for the mandible. An algorithm for segmenting these Muscles from magnetic resonance (MR) images was developed and tested. Materials and methods Anatomical information about the Muscles of Mastication in MR images is used to obtain the spatial relationships relating the muscle region of interest (ROI) and head ROI. A model-based technique that involves the spatial relationships between head and muscle ROIs as well as muscle templates is developed. In the segmentation stage, the muscle ROI is derived from the model. Within the muscle ROI, anisotropic diffusion is applied to smooth the texture, followed by thresholding to exclude bone and fat. The muscle template and morphological operators are employed to obtain an initial estimate of the muscle boundary, which then serves as the input contour to the gradient vector flow snake that iterates to the final segmentation. Results The method was applied to segmentation of the masseter, lateral pterygoid and medial pterygoid in 75 images. The overlap indices (κ) achieved are 91.4, 92.1 and 91.2%, respectively. Conclusion A model-based method for segmenting the Muscles of Mastication from MR images was developed and tested. The results show good agreement between manual and automatic segmentations.
-
automatic segmentation of Muscles of Mastication from magnetic resonance images using prior knowledge
International Conference on Pattern Recognition, 2006Co-Authors: S. H. Ong, Kelvin Weng Chiong Foong, P. S. Goh, Wieslaw L. NowinskiAbstract:We propose a knowledge-based, fully automatic methodology for segmenting Muscles of Mastication from 2-D magnetic resonance (MR) images. To the best of our knowledge, there is currently no methodology which automatically segment Muscles of Mastication. In our approach, MR images with Muscles of interest that have been manually segmented by medical experts are used to train the system to identify a relationship between the region of interest (ROI) of the head and ROI of the muscle. Anisotropic diffusion is used to smooth the ROI of the latter. Neighboring regions of the muscle are removed by thresholding. A template of the muscle, from the manual tracings, is used to obtain an initial segmentation of the muscle. Small unwanted regions in the ROI are removed via connected components labeling. A gradient vector flow (GVF) snake, using the initial segmentation as initialization, is used to refine the initial segmentation. We performed 2-D segmentation of the medial and lateral pterygoids on a total of 50 MR images, in the mid-facial region through the mandible with accuracy ranging from 85% to 98%.
-
ICPR (3) - Automatic Segmentation of Muscles of Mastication from Magnetic Resonance Images Using Prior Knowledge
18th International Conference on Pattern Recognition (ICPR'06), 2006Co-Authors: S. H. Ong, Kelvin Weng Chiong Foong, P. S. Goh, Wieslaw L. NowinskiAbstract:We propose a knowledge-based, fully automatic methodology for segmenting Muscles of Mastication from 2-D magnetic resonance (MR) images. To the best of our knowledge, there is currently no methodology which automatically segment Muscles of Mastication. In our approach, MR images with Muscles of interest that have been manually segmented by medical experts are used to train the system to identify a relationship between the region of interest (ROI) of the head and ROI of the muscle. Anisotropic diffusion is used to smooth the ROI of the latter. Neighboring regions of the muscle are removed by thresholding. A template of the muscle, from the manual tracings, is used to obtain an initial segmentation of the muscle. Small unwanted regions in the ROI are removed via connected components labeling. A gradient vector flow (GVF) snake, using the initial segmentation as initialization, is used to refine the initial segmentation. We performed 2-D segmentation of the medial and lateral pterygoids on a total of 50 MR images, in the mid-facial region through the mandible with accuracy ranging from 85% to 98%.
Martin S. Greenberg - One of the best experts on this subject based on the ideXlab platform.
-
The relationship of posture to myofascial pain dysfunction syndrome
Journal of the American Dental Association, 2015Co-Authors: Lloyd A. Darlow, Janice Pesco, Martin S. GreenbergAbstract:A controlled study was performed to test the hypothesis that myofascial pain dysfunction syndrome is related to posture. Thirty patients with myofascial pain of the Muscles of Mastication were compared with 30 control patients in 28 parameters of posture. The results of this study indicated no significant differences between the two groups in any parameter tested.
Marlind Alan Stiles - One of the best experts on this subject based on the ideXlab platform.
-
Temporomandibular joint pain and dysfunction
Current Pain and Headache Reports, 2006Co-Authors: Kathleen Herb, Marlind Alan StilesAbstract:Pain caused by temporomandibular disorders originates from either muscular or articular conditions, or both. Distinguishing the precise source of the pain is a signi ficant diagnostic challenge to clinicians, and effective management hinges on establishing a correct diagnosis. This paper examines terminology and regional anatomy as it pertains to functional and dysfunctional states of the temporomandibular joint and Muscles of Mastication. A review of the pathophysiology of the most common disorders is provided. Trends in evaluation, diagnosis, treatment, and research are presented.
Eric Edmur Camargo Arruda - One of the best experts on this subject based on the ideXlab platform.
-
Effect of mandibular mobilization on electromyographic signals in Muscles of Mastication and static balance in individuals with temporomandibular disorder: study protocol for a randomized controlled trial
Trials, 2013Co-Authors: Yasmin El Hage, Fabiano Politti, Dowglas F Magalhães De Sousa, Carolina Marciela Herpich, Igor Phillip Dos Santos Gloria, Cid André Fidelis De Paula Gomes, Ana Paula Amaral, Nívea Cristina De Melo, Thais Correa Da Silva, Eric Edmur Camargo ArrudaAbstract:Background The stomatognathic system and dysfunction in this system may be related to postural control. The proposal of the present study is to assess the effect of mandibular mobilization in individuals with temporomandibular disorder using surface electromyography of the Muscles of Mastication and stabilometric variables. Methods/Design A randomized, controlled, blind, clinical trial will be carried out, with the participants divided into three groups: 1) facial massage therapy (control group), 2) nonspecific mandibular mobilization and 3) specific mandibular mobilization. All groups will be assessed before and after treatment using the Research Diagnostic Criteria for Temporomandibular Disorders, surface electromyography of the masseter and temporal Muscles and stabilometry. This study is registered with the Brazilian Registry of Clinical Trials (RBR9x8ssz). Discussion A large number of studies have employed surface electromyography to investigate the function/dysfunction of the Muscles of Mastication and associations with signs and symptoms of temporomandibular disorders. However, it has not yet been determined whether stabilometric variables offer adequate reliability in patients with this disorder. The results of the proposed study will help determine whether specific and/or nonspecific mandibular mobilization exerts an effect on the Muscles of Mastication and postural control. Moreover, if an effect is detected, the methodology defined in the proposed study will allow identifying whether the effect is local (found only in the Muscles of Mastication), global (found only in postural control) or generalized.
-
Effect of mandibular mobilization on electromyographic signals in Muscles of Mastication and static balance in individuals with temporomandibular disorder: study protocol for a randomized controlled trial
Trials, 2013Co-Authors: Yasmin El Hage, Fabiano Politti, Dowglas F Magalhães De Sousa, Carolina Marciela Herpich, Igor Phillip Dos Santos Gloria, Ana Paula Amaral, Nívea Cristina De Melo, Thais Correa Da Silva, Cid André Fidelis De Paula Gomes, Eric Edmur Camargo ArrudaAbstract:Background The stomatognathic system and dysfunction in this system may be related to postural control. The proposal of the present study is to assess the effect of mandibular mobilization in individuals with temporomandibular disorder using surface electromyography of the Muscles of Mastication and stabilometric variables.
