ABSTRACT
We describe here the temporomandibular joint and masticatory muscle abnormalities disclosed by computed tomography and magnetic resonance imaging in a 25-year-old man with centronuclear myopathy (a congenital myopathy) who presented with marked limitation of jaw movements. We found an intense and general fatty replacement of the masticatory muscles, and magnetic resonance imaging signals indicated articular fibrosis. We conclude that in centronuclear myopathy, the presence of weakness and hypomotility of the masticatory muscles can induce chronic abnormalities of the temporomandibular joint.
Subject(s)
Myopathies, Structural, Congenital/complications , Temporomandibular Joint Disorders/etiology , Temporomandibular Joint Disorders/pathology , Adipose Tissue , Adult , Fibrosis , Humans , Magnetic Resonance Imaging , Male , Masticatory Muscles/pathology , Range of Motion, Articular , Temporomandibular Joint Disorders/physiopathology , Tomography, X-Ray ComputedABSTRACT
The mechanical stiffness of LIM-41 external fixator assemlages submitted to torsional strain was studied. A condition of unstable fracture was reproduced. The authors evaluated the effect of of Schanz pin configurations, defined as "distal", "standard" and "proximal", and of the distance, 20 mm, 40 mm or 60 mm between the external fixator and the element employed to simulate bone. The authors conclude that stiffer LIM-41 assemblages are obtained if the "standard" or "proximal" configurations are employed, on which some pins are placed near the fracture simulation site, and if the external fixator body is fitted closer to the bone simulating element, having the former variable greater influence over the stiffness coefficient.
Subject(s)
External Fixators , Biomechanical Phenomena , Materials Testing , Rotation , Tensile Strength , Weight-BearingABSTRACT
Eight patients with Klippel-Trenaunay-Weber syndrome were treated for leg length inequality of as much as 10 cm in one ten year old, and one thirteen year old. In most cases adequate correction was achieved with epiphyseal stapling during active growth or definitive epiphysiodesis in older children. Bone shortening procedures in full-grown individuals may be indicated but the basic condition may make healing difficult. Ligation of the femoral artery had no effect on the growth of the affected leg.
