Stabilization splint treatment on complete denture--two reported cases.

The pre-prosthetic treatments of two female patients with osteoarthritis of the temporomandibular joints were presented in this paper. In the first case report, an 83-year-old patient wore complete dentures (CDs) for 30 years. The second patient (71 years of age) wore a three-year-old upper CD and a lower removable partial denture with a two-unit fixed dental prosthesis. Pain was successfully eliminated by the stabilization splint on the upper CD. Magnetic resonance imaging was used to confirm the diagnosis and clinical follow-up of the splint treatment.

The influence of season on oxidant-antioxidant status in trained and sedentary subjects.

The association between oxidative stress and cardiovascular diseases is a widely accepted fact today. Generally, men have a higher risk of cardiovascular incidents and mortality from acute myocardial infarction and strokes. We have examined sport-associated circannual rhythms of oxidant and antioxidant processes by measuring plasma LPO, erythrocyte SOD, CAT, Gpx activity and plasma hormonal status in both sedentary and long-term trained men and women. We have shown seasonal variations in both oxidant and antioxidant status in all examined groups. The largest difference was observed in the oxidant status between sedentary men and women during autumn and winter, which is considered a period of high coronary risk for men. Sport decreased LPO in trained men in autumn, while the same effect in trained women was shifted towards summer. These data state that regular, long-term physical exercise training induces adaptive responses that confer protection against oxidative stress, as well as the beneficial effect of exercise with regard to season, particularly in men during a period of high coronary risk (autumn and winter, respectively) and in women during summer.

Effect of hemodilution on RBC velocity, supply rate, and hematocrit in the cerebral capillary network.

The effect of isovolemic hemodilution on the circulation of red blood cells (RBCs) in the cerebrocortical capillary network was studied by intravital videomicroscopy with use of a closed-cranial-window technique in the rat. Velocity and supply rate of RBCs were measured by tracking the movement and counting the number of fluorescently labeled cells. Arterial blood was withdrawn in increments of 2 ml and replaced by serum albumin. Arterial blood pressure was maintained constant with an infusion of methoxamine. Both velocity and supply rate of RBCs increased, by approximately equal amounts, as arterial hematocrit was reduced from 44 to 15%. The maximum increase in RBC velocity was 4.6 and in RBC supply rate was 5.2 times the baseline value. Calculated lineal density of RBC, an index of capillary hematocrit, did not change with hemodilution. The results suggest that RBC flow and oxygen supply in the cerebral capillary network are maintained during isovolemic hemodilution. The "optimal hematocrit" is as low as 15%.

Remodeling of the leptomeningeal microvascular plexus in neonatal rats.

In order to better understand the mechanisms of cerebrovascular development and differentiation, the leptomeningeal microcirculation was analyzed using in vivo fluorescence video-microscopy in neonatal (1, 9, and 12 day old) Sprague-Dawley rats. The pattern of flow distribution was reconstructed, the location of radially emerging intracortical veins was identified and the minimum distance between these vessels was measured. We found no AV connections in the leptomeningeal vasculature of the neonatal rat in all examined animals. The LVP in the neonatal period of life is a venous system and probably does not serve as a major source of oxygen supply to cerebral tissue. After birth, the number of radial vessels does not increase, suggesting that intracortical vascularization continues by the branching of existing radial vessels.

[Comparative analysis of pathomorphologic changes in the adrenal glands using ultrasound and computer tomography]. / Usporedna analiza patomorfoloskih promjena nadbubreznih zlijezda ultrazvukom i kompjutoriziranom tomografijom.

A prospective study of the possibilities and achievements of ultrasonography of the adrenal glands is presented. The adrenal glands of 146 patients with abnormalities suspected clinically were examined with ultrasound. Patients were also evaluated with computed tomography where there are firm criteria for the evaluation of adrenal pathology. Positive findings were detected by ultrasound in 46 patients, whereas computed tomography disclosed pathologic changes in 65 patients. In 81 patients, the finding of computed tomography was normal. With ultrasound, false positives were obtained in 3 cases and false negatives in 19 cases (14 hyperplasias, 5 tumors). Ultrasound findings were additionally compared with angiographic and clinical tests as well as with pathohistologic results of surgery and autopsy.

Hypoxemia alters erythrocyte perfusion pattern in the cerebral capillary network.

The effect of acute hypoxemia on erythrocyte perfusion rates in individual capillaries of the rat cerebral cortex was studied by intravital video microscopy. The motion of erythrocytes in subsurface capillaries of the frontoparietal cortex was visualized through a closed cranial window using fluorescently labeled red blood cells (FRBC) as markers of flow. FRBC velocity and FRBC supply rate were measured in each capillary at rest, moderate hypoxemia (PaO(2) = 40 mm Hg), and severe hypoxemia (PaO(2) = 26 mm Hg). Lineal density of FRBC in the capillaries was calculated as the ratio of supply rate and velocity. Hypoxemia increased erythrocyte perfusion in virtually all capillaries. Average FRBC supply rate increased by 104% in moderate hypoxemia and by 281% in severe hypoxemia. Average FRBC velocity increased by 66 and 173%, respectively. During severe hypoxemia, FRBC supply rate increased significantly more in capillaries with low resting supply rate compared to those with high resting supply rate. Changes in FRBC velocity exhibited a similar pattern. Lineal density of FRBC increased by 28% in moderate hypoxemia and by 48% in severe hypoxemia. The results suggest that acute hypoxemia promotes perfusion homogeneity and recruitment of erythrocytes in the cerebral capillary network.

Adrenal cavernous hemangioma: MRI, CT, and US appearance.

Two cases of rare adrenal cavernous hemangiomas are reported, one imaged with conventional X-ray techniques, US, CT, and MRI, and the other with US and CT. The CT technique clearly demonstrated calcifications and the internal structure of the lesions in both cases and peripheral rim enhancement on the postcontrast scan in one patient. Although MRI demonstrated accurately the complex nature of the lesion, the inability to visualize the calcified areas do not allow to make a specific histologic diagnosis.