Abstract
The replacement of soft lining material is necessary for a better clinical effect. However, the changing work brings about a very unhygienic environment and demands much labor.If we can peel the material from the denture base without a cutting motion, the situation will bebetter.
In this study, bond strength of three temporary soft lining materials (Soft-Liner, Visco-gel, trialmaterial) to a denture base (ACRON) with three separators (Vaseline, experimental separator, Visco-gel Lubricant) were examined in tension and shearing tests and observed for separationaspect.
The results were as follows:
1. Separation effect of Vaseline showed the highest value in all conditions, followed by that ofexperimental separator and Visco-gel Lubricant.
2. In bond strength, the same tendency was observed in between tension and shearing tests.
3. In the tension test, the separation aspect of Visco-gel Lubricant showed cohesive failure inall specimens, Vaseline showed interfacial failure in all, and experimental separator showed mixedfailure in half, however, the percentage of cohesive failure was only about 2.5%.
4. In the shearing test, separation aspect of Visco-gel Lubricant showed cohesive failure and Vaseline and experimental separator showed interfacial failure in all.
5. Experimental separator showed about 70% bond strength as compared with control.
