Avaliação do crescimento condilar através de cintilografia óssea em pacientes com mordida cruzada posterior funcional / Assessment of condylar growth by skeletal scintigraphy in patients with posterior functional crossbite

OBJETIVOS: avaliar a atividade de crescimento condilar em 10 pacientes com mordida cruzada posterior funcional antes e após a correção, usando a cintilografia óssea mandibular. MÉTODOS: os pacientes receberam injeção endovenosa de contraste radioativo (Technesium-99m, difosfato de metileno de sódio). Após duas horas, imagens cintilográficas planares foram realizadas por meio de uma câmera Gama. Imagens laterais da boca fechada, mostrando os côndilos direito e esquerdo, foram usadas. Uma imagem da quarta vértebra lombar também foi usada como referência. RESULTADOS: diferenças estatisticamente significativas não foram encontradas nos valores da taxa de absorção, em ambos os lados, quando os períodos de pré-tratamento e pós-tratamento foram analisados separadamente e também quando os períodos de pré-tratamento e pós-tratamento foram analisados no mesmo lado. Não foram encontradas diferenças na atividade de crescimento condilar em pacientes com mordida cruzada posterior funcional.

OBJECTIVES: This study evaluates the condylar growth activity in 10 patients with functional posterior crossbite before and after correction, using the mandibular bone skeletal scintigraphy. METHODS: Patients received endovenous injection of radioactive contrast (Technesium-99m labeling, sodium methylene diphosphate). After two hours, planar scintigraphic images were taken by means of a Gamma camera. Lateral images of the closed mouth, showing the right and left condyles, were used. An image of the 4th lumbar vertebra was also used as reference. RESULTS: Statistically significant differences were not found in the uptake rate values, on both sides when pre-treatment and post-treatment periods were analyzed separately and also when pre-treatment and post-treatment periods were analyzed in the same side. No differences were found in the condylar growth activity, in patients with functional posterior crossbite.

Useful Lateral Views of Sacrococcygeal Region in Skeletal Scintigraphy / 대한핵의학회잡지

A tail-on-detector (TOD) view has been used to see the symphysis pubis or sacrococcyx in skeletal scintigraphy, but it is inconvenient to acquire because a patient must sit or lean on a detector. The TOD views are still frequently performed in training hospitals in Korea, although it is becoming almost impossible to sit on a camera in this age of dual-headed cameras. The authors show cases with lateral views obtained in supine position that were acquired for the same reason; they are easier and more useful than the TOD views.

Skeletal Scintigraphy in Suspected Scaphoid Fracture / 대한정형외과학회잡지

We used skeletal scintigraphy which had a high sensivity in the diagnosis of acute fractures in clinically suspected scaphoid fracture to elevate diagnostic accuracy, and then evaluated the results. From February 1993 to April 1994, twenty patients with a clinical suspicion of a scaphoid fracture in spite of normal skeletal films had been examined with skeletal scinigraphy of the wrist Sensitivity was 100%, specificity 30.8%, positive predictable value 43.8%, and negative predictable value 100%. The patients with positive scintigraphy and normal x-ray were free from symptoms in 4-6 weeks in spite of no treatment. In conclusions, Skeletal scintigraphy is of major importance in carpal trauma to rule out scaphoid fracture. Information obtained through scintigraphy often proved a prerequisite both for the retrospective identification of the fracture and for repeat directed skeletal view. The lesions in the distal radius and other carpal bones may clinically mimic a scaphoid fracture. and the authors feel to need further specific diagnostic tools such as MRI in cases with carpal injuries and scinitigraphic uptake indicative of a fracture when even skeletal views turn out normal. However, scintigraphy doesn't seem to be a guide of trament in these patients.