Earticle

Purpose: The aim of this study was to evaluate the marginal and internal gap of wax copings fabricated from extraoral scanning with intraoral scanning. Methods: Fifteen study models(abutment of teeth 16) were made by PMMA. STL files of thirty abutment were prepared by intraoral scanning with extraoral scanning. Wax copings of thirty fabricated using CAD/CAM system. Marginal and internal gap of wax copings of thirty were measured by silicone replica technique and digital microscope( 140). Date were analyzed by using independent samples t-test. Results: Mean (SD) of two group were measured 55.61(27.42) for totally gap of ES group and 60.67 (33.14) for totally gap of IS group. But marginal and internal gap of two group were not differences statistically significant(p>0.05). Conclusion: Evaluation of marginal and internal gap of two group showed that no differences statistically significant and clinically acceptable results.

Purpose: In this study, Spreadability of denture adhesive in accordance with the saturation level of saliva, respectively, by using the resin plate and the glass was measured thickness and Spreadability. Methods: Examine the spreadability of denture adhesive in accordance with the saturation level of saliva, respectively, by using the resin plate and the glass was measured thickness and Spreadability. Also, by measuring the adhesive strength according to the amount of saliva, and the edentulous patients using denture adhesive and dry mouth patients attempt to provide clinical information of the denture adhesive. Therefore, by using the relatively low shrinkage cold curing resin, after fabricating specimen of plate form, for 7 days, it was immersed in water. Results: For the control group only denture adhesive, an artificial saliva for the experimental group were injected in 0.1㎖, 0.2㎖ and 0.3㎖ of the denture adhesive on the surface, experimental results of the investigation of the 10 times the tensile bond strength of the specimens in each group was obtained the following results. Conclusion: As the time to pressure increase in the same amount of saliva was found that the amount coming out of the denture adhesive, as the amount of saliva in the same pressure increase coming out of many denture adhesives. And the greater the pressure came out a lot of denture adhesives. Spreadability in measuring saliva contact with 0.1㎖ and 2㎖ and 3㎖ group pressured the diameter of the circular was the denture adhesive is small when compared to the group without adding the pressure of 2㎏ and 3㎏ put the saliva. The size of the circle is the same amount of saliva denture adhesive spread more pressure showed a greater increase.

Purpose: This study aimed to evaluate and compare the oral health behavior in adults and their oral health status according to their residential area. Methods: The date of ‘The fifth Korea National Health and Nutrition Examination Survey 2012’ was analyzed for this study. This study were adults over the age of 18 who participated in interviews with the use of a questionnaire and oral examinations. Of those, 4,273 who met all the variables necessary were selected for the final analysis. The residential areas were categorized into ‘metropolitan city’, ‘city’, and ‘rural area’ based on Dong, Eup and Myon as administrative districts. Results: Adjusted odds ratio of oral health behavior according to residential area, self-recognition of oral health status for subjects in rural areas was 0.75(0.59-0.96), using oral hygiene devices for those in rural areas was 0.75(0.63-0.88). Adjusted odds ratio of oral health status according to residential area, periodontal disease in rural areas was 1.97(1.62-2.41), the necessity of prosthetic treatment in subjects in rural areas was 1.27(1.01 -1.60). Conclusion: It was discovered that there was a difference between the oral health behavior and oral health status of adults according to residential area. Therefore, to enhance oral health status, programs for which the characteristics of areas with such differences were considered should be developed and consistent research on strategies to reduce the gaps in the oral health status should be made.