RESUMO
Primary hyperparathyroidism presenting with diffuse skeletal involvement, such as discrete osteoclastic bone lesions, is rare. We describe a 35-year-old woman who presented with a left mandibular mass that rapidly enlarged over 3 weeks. Radiological, histological, and biochemical investigations led to the diagnosis of brown tumor secondary to primary hyperparathyroidism. A neck ultrasound revealed a 1.5 × 2.3 × 4.6 cm mass at the lower pole of the left thyroid lobe, suggestive of a parathyroid adenoma. Bone scan showed additional abnormal foci of increased uptake in the maxilla, both femora, skull, and scapula. Brown tumors are treated primarily by correcting the underlying endocrine disorder, and a parathyroidectomy was performed.
RESUMO
We reviewed studies wherein the cutting of dental tissues, simulating interactions that would occur under clinical circumstances in the mouth, have been observed directly-first by real time, video rate, stereoscopic, three-dimensional scanning electron microscopy; and second and more conveniently, by video rate confocal optical microscopy. We have observed, directly, both the interactions of slow-moving cutting instruments emulating "chisels" and high-speed events, including the effects of rotary burs and air-propelled abrasive particles and soft powder slurries. The observational data contribute to our basic understanding of the functional behavior of dental tissues and formed a useful background for the practitioner of operative dentistry.
Assuntos
Esmalte Dentário/ultraestrutura , Dentística Operatória/instrumentação , Microscopia Confocal , Equipamentos Odontológicos de Alta Rotação , Microabrasão do Esmalte/instrumentação , Humanos , Imageamento Tridimensional , Microscopia Eletrônica de Varredura , Microscopia de Vídeo , Gravação em VídeoRESUMO
A 32-year-old man presented with a complicated crown-root fracture of a maxillary lateral incisor. The fracture extended subgingivally, and apical to the alveolar bone crest, invading the biologic width. Flap surgery to expose the fractured root face was performed and the coronal tooth fragment reattached with a dual-cure resin adhesive. Examination six months after treatment revealed periodontal health, good aesthetics and normal function.
