The relationships between the transmission coefficient and the cure depth were evaluated on eight commercially available light-activated resin composites. The determination of transmission coefficient was carried out by the use of a radiometer for various shades of the resin composites. The transmission coefficient, ranging from 0.042 to 0.263, was dependent upon the shade of the resin. There was a good correlation between the transmission coefficient and the cure depth for different shades for each resin composite, except for one hybrid resin composite (P-50). The microfilled resin composite showed transmission coefficient and cure depth lower than those of the hybrid and small-particle-filled resin composites.

The effect of water sorption on the ultimate transverse strength of a heat-cured denture base resin relined with four different direct denture reline materials was investigated.The relined specimens were tested after 1 day and 1 month of water immersion. It was found that prolonged duration of water immersion and an increase in the thickness of the reline material significantly (p<0.01) decreased the ultimate transverse strength of specimens relined with powder-liquid type direct reline materials. Specimens relined with paste type reline material did not change the ultimate transverse strength after 1 month of water immersion significantly.

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Background and Aim: The feasibility of TDM-621, the synthetic infectious agent-free peptides, was tested in hemostasis of the bleeding after endoscopic treatments of the gastric tumors. Methods:The patients who underwent endoscopic mucosal resection (EMR) or endoscopic submucosal dissection (ESD) were enrolled in the present study. The subject of hemostasis was the oozing after the EMR or ESD. The hemostatic effect, the secondary hemorrhage from one postoperative day to the day before discharge and operability were studied. Results: The hemostatic effects were assessed in 12 patients. It was "remarkably effective" in 11 patients and "effective" in 1 patient. The operability was "very easy" in two patients, "easy" in eight patients and "acceptable" in two patients. No secondary hemorrhage was observed in all of 12 patients. No adverse effect considered to be related to TDM-621 was observed. Conclusion: It was shown that hemostasis using TDM-621 was feasible after endoscopic treatments of the gastric tumors without any technical trouble or adverse event.