The Effect of Social Situations on Risky Decision-Making in Individuals With Borderline Personality Tendency

Objective@#This study examined the effect of social situations on risky decision-making in individuals with a borderline personality tendency (BT). @*Methods@#Fifty-eight participants with either high or low levels of BT were included in this study. Those who met the screening criteria were assigned to one of the two social situations (exclusion vs. inclusion) and they played the Cyberball game. Next, the participants were required to play the “Game of Dice” task to measure their decision-making pattern. @*Results@#The results revealed that individuals with high BT (n=28) showed significantly higher risky decision-making, compared with low BT (n=30) in the exclusion condition. However, no significant difference was found in the social inclusion condition. @*Conclusion@#In the social exclusion condition, individuals with high BT made risky decision in response to negative feedback, regardless of the previous decision. These findings can be applied to develop appropriate interventions in psychotherapy for individuals with borderline personality disorder/tendency.

Comparison of apical seal with or without the use of dentin adhesive system / 대한치과보존학회지

The purpose of this study was to compare the sealing ability of root canal obturation with or without the use of dentin adhesive system. Forty extracted human teeth with one canal were selected and decoronated. The teeth were divided into two Groups. The obturation procedure of Group 1 was the same as that of Group 2 with the exception of dentin adhesive system. Group 2 were obturated with dentin adhesive system, AH-26, and gutta-percha. After obturation, the teeth were immersed in methylene blue solution for 84 hours. The teeth were sectioned horizontally at 1.5 mm (Level 1), 2.0 mm (Level 2), 2.5 mm (Level 3) from the root apex using a low speed microtome. Distance of dye-penetrated surface and total dentinal surface were measured using SigmaScan Pro 5.0, and the ratio of dye-penetrated distance to the total dentinal distance was analyzed statistically by Mann-Whitney U-test. 1. In both groups, the mean leakage ratio was decreased cervically. 2. At level 1, there was no significant difference between group 1 and grpup 2 (p > 0.05). 3. At level 2 and 3, group 1 showed significantly higher mean leakage ratio than group 2 (p < 0.05). The results suggest that using dentin adhesive system in root canal obturation procedure reduces the apical microleakage.