RESUMO
The purpose of the study was to test the hypothesis that condylar shape varies based upon the condition of anterior disk displacement in young adolescent patients with temporomandibular disorder (TMD). The study design consisted of 96 juvenile female patients (aged 9 to 20; 15.1 +/- 2.3 yrs.) with clinical signs and/or symptoms of TMD. Bilateral high-resolution magnetic resonance imaging scans were performed in frontal and horizontal views with the mandible in the closed position. Disk positions were evaluated to classify the patients into three diagnostic groups. The results of the study, using ANOVA and Bonferroni tests, demonstrated significant differences among the groups. The conclusion drawn from the study was that condylar shape and size vary based on anterior disk position in juvenile females with TMD. The study's results suggest that disk displacement results in a smaller condyle.
Assuntos
Luxações Articulares/patologia , Côndilo Mandibular/patologia , Disco da Articulação Temporomandibular/patologia , Transtornos da Articulação Temporomandibular/patologia , Adolescente , Cefalometria/métodos , Criança , Feminino , Humanos , Aumento da Imagem/métodos , Processamento de Imagem Assistida por Computador/métodos , Luxações Articulares/classificação , Imageamento por Ressonância Magnética/métodos , Amplitude de Movimento Articular/fisiologia , Transtornos da Articulação Temporomandibular/classificação , Adulto JovemRESUMO
AIMS: To investigate the responses of the hypothalamus-pituitary-adrenocortical and sympathetic-adrenal-medullary systems to experimentally induced psychological stress in patients with myofascial pain. METHODS: To characterize the features of these systems, temporal variations in plasma cortisol, adrenaline, and noradrenaline concentrations in response to psychological stress were measured in 20 patients with myofascial pain and in 20 healthy controls. RESULTS: The concentrations of plasma cortisol, adrenaline, and noradrenaline in response to psychological stress were significantly higher in the pain patients than in the healthy controls. Furthermore, although the plasma cortisol, adrenaline, and noradrenaline concentrations were significantly increased from the basal levels in both groups, the rate of recovery from these levels was significantly slower in patients than in healthy controls. CONCLUSION: These results suggest that both the sympathetic-adrenal-medullary and hypothalamic-pituitary-adrenocortical systems are more highly activated in response to psychological stress in patients with myofascial pain than in healthy individuals.
