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Mandibular kinematic and electromiographic analysis on oral motor function

Grant number: 09/13525-9
Support type:Scholarships abroad - Research
Effective date (Start): April 01, 2010
Effective date (End): August 31, 2010
Field of knowledge:Health Sciences - Speech Therapy
Principal researcher:Cláudia Maria de Felício
Grantee:Cláudia Maria de Felício
Host: Chiarella Sforza
Home Institution: Faculdade de Medicina de Ribeirão Preto (FMRP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil
Research place: Università degli Studi di Milano, Italy  


Individuals with temporomandibular disorders (TMD) frequently present limitations of masticatory function. Aims: (a) to quantify the mandibular and condylar movements, using three-dimensional analysis; (b) to analyze the electromyographic (EMG) features of masticatory muscles during the maximal voluntary contraction (MVC) and chewing in TMD patients. Method: Ten subjects with TMD and 10 health subjects without TMD will be submitted to clinical examination, interview and occlusal contacts record. Experiment I: Three-dimensional Motion Analysis: Free and habitual movements of mouth opening and closing will be registered using an optoelectronic three-dimensional movement analyzer (SMART System, E-motion, Padova, Italy), to calculate: the displacement of incisor teeth on sagittal plane and the Cardano'angles in maximum mouth opening, the condylar translation and rotation components, the mandibular movement, the buccal opening and closing velocity and the total duration of masticatory cycle.Experiment II: Electromyographic Analysis: The EMG activities of masseter and anterior temporal muscles will be analyzed using the computerized instrument (Freely - De Götzen srl; Legnano, Milano, Itália), at tasks: (1) MVC with two cotton rolls positioned on the mandibular first and second molars, and a 5-s MVC will be recorded (standardized record). Data analysis: Descriptive statistics will be computed for analyzed variables. The groups will be compared by non-parametric tests (interarch contacts) and by t-test (paired data) motion analysis and EMG variables will be compared by Student t-test. Probabilities of less than 0.05 will be accepted as significant. (AU)

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
DE FELICIO, CLAUDIA MARIA; MAPELLI, ANDREA; SIDEQUERSKY, FERNANDA VINCIA; TARTAGLIA, GIANLUCA M.; SFORZA, CHIARELLA. Mandibular kinematics and masticatory muscles EMG in patients with short lasting TMD of mild-moderate severity. JOURNAL OF ELECTROMYOGRAPHY AND KINESIOLOGY, v. 23, n. 3, p. 627-633, JUN 2013. Web of Science Citations: 22.

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