Oral-motor and electromyographic characterization of patients submitted to open a nd closed reductions of mandibular condyle fracture.
OBJECTIVE
To characterize the oral-motor system of adults with mandibular condyle facture comparing the performance of individuals submitted to open reduction with internal fixation (ORIF) and closed reduction with mandibulomaxillary fixation (CRMMF).


METHODS
Study participants were 26 adults divided into three groups: G1 - eight individuals submitted to ORIF for correction of condyle fracture; G2 - nine individuals submitted to CRMMF for correction of condyle fracture; CG - nine healthy volunteers with no alterations of the orofacial myofunctional system. All participants underwent the same clinical protocol: assessment of the orofacial myofunctional system; evaluation of the mandibular range of motion; and surface electromyography (sEMG) of the masticatory muscles.


RESULTS
Results indicated that patients with condyle fractures from both groups presented significant differences compared with those from the control group in terms of mobility of the oral-motor organs, mastication, and deglutition. Regarding the measures obtained for mandibular movements, participants with facial fractures from both groups showed significant differences compared with those from the control group, indicating greater restrictions in mandibular motion. As for the analysis of sEMG results, G1 patients presented more symmetrical masseter activation during the task of maximal voluntary teeth clenching.


CONCLUSIONS
Patients with mandibular condyle fractures present significant deficits in posture, mobility, and function of the oral-motor system. The type of medical treatment does not influence the results of muscle function during the first six months after fracture reduction. Individuals submitted to ORIF of the condyle fracture present more symmetrical activation of the masseter muscle.
Universidade de São Paulo - USP - São Paulo (SP), Brasil.
Amanda Pagliotto da
AP
Silva
Universidade de São Paulo - USP - São Paulo (SP), Brasil.
Fernanda Chiarion
FC
Sassi
Universidade de São Paulo - USP - São Paulo (SP), Brasil.
Claudia Regina Furquim de
CR
Andrade
D000293:Adolescent; D000328:Adult; D003430:Cross-Sectional Studies; D004576:Electromyography; D005146:Facial Asymmetry; D005260:Female; D005592:Fracture Fixation / Q000379:methods*; D005593:Fracture Fixation, Internal / Q000379:methods*; D006801:Humans; D008297:Male; D008335:Mandibular Condyle / Q000293:injuries*; D008337:Mandibular Fractures / Q000601:surgery*; D011247:Pregnancy; D011446:Prospective Studies; D016059:Range of Motion, Articular; D013704:Temporomandibular Joint / Q000293:injuries*