Estudo das disfunções temporomandibulares e do comportamento eletromiográfico dos músculos masseter e do temporal pré e cinco anos após tratamento com cirurgia ortognática em pacientes com prognatismo mandibular

Author(s)

Rosario Martha de La Torre Vera

• Document type: Doctoral Thesis
• Press: Piracicaba, SP.
• Institution: Universidade Estadual de Campinas (UNICAMP). Faculdade de Odontologia de Piracicaba
• Defense date: 2014-02-14

Examining board members

Fausto Bérzin; Simone Cecilio Hallak Regalo; Francisco José de Moraes Macedo; José Ricardo de Albergaria Barbosa; Mirian Hideko Nagae

• Advisor: Fausto Bérzin

Abstract

Objectives : To evaluate the signs and symptoms of temporomandibular disorders , chronic pain , depression , as well as evaluate the muscle function of the masseter and temporal in mastication . All these variables were analyzed before and five years after orthognathic surgery. Materials : RDC ( reseach diagnostic Criteria) questionnaire was used to assess and classify the type of temporomandibular disorders ( TMD ) , as well as to observe the degree of chronic pain and depression ( axis II ) , for the analysis of the signs and symptoms of the TMD axis I RDC was used . In the analysis of the masticatory cycle Myosystem I electromyography and software Myosystem BRI , version 2.52 ( DataHominis Technology Ltd. ) was used . The muscles tested were the anterior part of the temporal and superficial part of the masseter muscle on both sides . Muscle performance was evaluated in five periods : pre - surgery 2-3 months ( T0 ), 6 months post- surgery ( T1 ) , 12 months ( T2 ) , 24 months ( T3 ) and 60 months ( T4 ) . Results: Chronic pain and depression showed improvement after 5 years of surgical treatment . Regarding the other variables , we observe that 12 , 24 and 60 months after surgery , there is an increase in the time and the maximum moment of the masticatory cycle activity. The RMS has the most stable EMG signal after five years of surgical treatment Conclusion : orthognathic surgery is no treatment for temporomandibular disorders . The masticatory cycle shows improvement in electromyographic signal for prognathic patients without any type of temporomandibular disorders (AU)

• FAPESP's process: 10/08185-1 - Eletromyographic, cephalometric, muscular symmetry and pain evaluation of masticatory muscles in skeletal Class III patients undergoing orthodontic-surgical treatment.
• Grantee: Rosario Martha de La Torre Vera
• Support Opportunities: Scholarships in Brazil - Doctorate