RESUMO
Microanatomic features of unilateral condylar hyperplasia (UCH) are described. The articular surface exhibited clefts with surrounding elevations, and globules varying 0.5-2 microns in diameter. The articular zone presented giant coiled fibers, and the proliferative zone was composed of small round cells. The findings suggest that degenerative changes occur in UCH, both in adult and juvenile forms.
Assuntos
Côndilo Mandibular/ultraestrutura , Adolescente , Adulto , Cartilagem Articular/ultraestrutura , Assimetria Facial/patologia , Feminino , Humanos , Hiperplasia/patologia , Má Oclusão/patologia , Microscopia Eletrônica de Varredura , Propriedades de SuperfícieRESUMO
Two cases of active unilateral condylar hyperplasia which were treated with condylectomy alone are presented. The first case was an adult form and the other a juvenile form. Both were classified as active by using 99Tc bone scintigraphy. Clinical and radiographic features of both cases conformed to the hemimandibular hypertrophy type. Satisfactory facial symmetry and dental occlusion were achieved. Histopathological data confirmed the activity of the articular cartilage layers.
Assuntos
Assimetria Facial/etiologia , Côndilo Mandibular/patologia , Doenças Mandibulares/complicações , Adolescente , Adulto , Feminino , Humanos , HiperplasiaRESUMO
The effect of indirect trauma to the rat temporomandibular joint (TMJ) is analysed by means of an experimental model. The trauma, applied from an angle-glenoid fossa direction, produced injury of the TMJ. The histological data demonstrated that the impact could produce fractures of the glenoid fossa, but no hemarthrosis was observed. Trauma, both with or without fracture, caused proliferative changes in the TMJ. The glenoid fossa, the articular disk and the articular surface of the condyle were injured. Thickening of the articular surfaces had resulted in reduced joint space. Subsequently, remodelling changes in the condyle were found.