STATEMENT OF PROBLEM: Proper proximal contact is important for maintaining and stabilizing the dental arch. However, the proximal contact strength (PCS) is not a constant value and can be affected by a variety of factors. PURPOSE: This study examined the influences of postural changes on the posterior PCS. MATERIAL AND METHODS: Twelve adults with a normal occlusion and had not undergone prosthetic treatment or proximal restoration were participated in this study. A metal strip was inserted into the proximal surface and removed at a constant velocity. The contact strength was measured in every contact point between canine to second molar in both arches. The PCSs were obtained initially in the upright position, secondly in the supine position and finally in the upright position again. All measurements were repeated after a 2 hour period. Statistical analysis was carried out using the Friedman test (P < .05). RESULTS: Generally, a decrease in PCS occurred when the posture was changed from the initial upright to supine position, while it increased when the posture was changed from the supine to upright position. A significant change was observed in all areas except for between the canine-first premolar in the maxilla and between the first molarsecond molar in the mandible areas. CONCLUSION: The posterior PCS, which dentists generally believe to be a static feature of occlusion, is affected significantly by posture.
Adult ; Bicuspid ; Dental Arch ; Dentists ; Humans ; Mandible ; Maxilla ; Molar ; Posture ; Supine Position

The purpose of this study was to investigate the characteristics or the potassium channels existing in the rat urinary bladders. Smooth muscle strips of rat detrusor urinae were examined by isometric myography. Relaxation responses of detrusor muscle strips to the three potassium channel openers pinacidil, a cyanoguanidine derivative, BRL 38227, a benzopyran derivative and RP 52891, a tertrahydrothiopyran derivative were examined. The potassium channel openers reduced the basal tone, and the rank order of potency was RP 52891>pincidil>BRL 38227. Procaine, an inhibitor of the voltage-sensitive potassium channel tended to increase the basal tone, but it did not affect the relaxant effects of the calcium-activated potassium channel opener did not antagonize the relaxant effects, but it reduced the Emax of RP 52891 and BRL 38227. Glibenclamide, an inhibitor of the ATP-sensitive potassium channel, antagonized the relaxant effects of pinacidil, RP 52891 and BRL 38227 reducing the Emax of RP 52891 and BRl 38227. Galanin which inhibits secretion of insulin through opening the ATP-sensitive potassium channels in pancreatic β-cells rather increased the basal tone of the isolated detrusor strips. These results suggest that the urinary bladder of the rat has mainly the ATP-sensitive, glibenclamide sensitive potassium channel, which is a different type from that in the pancreatic β-islet cells.
Animals ; Cromakalim ; Galanin ; Glyburide ; Insulin ; KATP Channels ; Muscle, Smooth ; Myography ; Pinacidil ; Potassium Channels* ; Potassium Channels, Calcium-Activated ; Potassium* ; Procaine ; Rats* ; Relaxation ; Urinary Bladder

The clinicolaboratory findings, cardiac catheterization, and outcome of operation were analyzed in 78 patients with tetralogy of Fallot, which were diagnosed by echocardiography, cardiac catheterization, and a cardiac angiography and confirmed by operation at Dong San Hospital, Keimyung University, during a 4(1/2)-year period from January 1984 to June 1988. The following results were obtained : 1) Out of the 78 cases, 45 were male and 64 were female. 2) The electrocardiogram showed right axis deviation in 71 cases(91%) and right ventricular hypertrophy in 66 cases(84.6%). 3) Chest X-ray revealed that, the cardiothoracic ratio was normal or decreased in 68 cases(87.3%), and cardiac apex elevation was noticed in 57 cases(73%). 4) Pulmonary stenosis were chiefly valvular and infundibular type(53.8%). 5) The associated heart diseases with TOF were patent foramen ovale(64.1%), right sided aortic arch(19.2%), and secundum ASD(10.3%), in that order. 6) There was an intimate correlation between secondary polycythemia and thrombocytopenia. 7) Among the 78 Cases, 73 cases had total correction, 1 case had shunt operation, and 4cases had total correction after shunt operation. The highest mortality rate occurred in the cases of total correction after shunt operation(25%). The cases with a main pulmonary artery size of 1/3 to 2/3 against, the aorta had a higher mortality than the other group, and no cases expired in the group with a ratio of more than 2/3. The overall surgical mortality was 8.9%.
Angiography ; Aorta ; Axis, Cervical Vertebra ; Cardiac Catheterization ; Cardiac Catheters ; Echocardiography ; Electrocardiography ; Female ; Heart Diseases ; Humans ; Hypertrophy, Right Ventricular ; Male ; Mortality ; Polycythemia ; Pulmonary Artery ; Pulmonary Valve Stenosis ; Tetralogy of Fallot* ; Thorax ; Thrombocytopenia

No abstract available.
Ankylosis* ; Radiotherapy* ; Temporomandibular Joint*

No abstract available.
Nephrotic Syndrome*

No abstract available.
Blood Flow Velocity* ; Humans ; Infant, Newborn*

No abstract available.
Melanoma ; Nevus

No abstract available.
Fistula* ; Pyriform Sinus* ; Thyroiditis, Suppurative*

No abstract available.
Animals ; Mice* ; Oocytes*

No abstract available.
Education ; Humans