Bond Strength of Abrasion-Resistant Plastic Denture Teeth for Pour-type Denture Base Resin.

We have investigated pour-type acrylic denture base resin and are convinced that it is very useful in making removable dentures. Recently, abrasion-resistant plastic denture teeth havebeen used frequently in the clinic. In this study, we made a bond strength test for three kinds ofabrasion-resistant plastic denture teeth and two kinds of pour-type denture base resin, in order toexamine clinical treatment methods when using these materials. These artificial teeth consist oftwo or three layers. The basal layer made of PMMA for adhering to the denture base resin wasremoved in this study. The treatment methods in the bonding surfaces of artificial teeth were asfollows: 1) no treatment, 2) treatment with a synthetic detergent, 3) treatment with a supplementalbonding agent, and 4) scraping off the basal surface of artificial teeth.The results were as follows: 1. In no treatment, most of the teeth peeled completely or partiallyoff the bonding surface, 2. The effect of the treatment with a synthetic detergent was found to beincomplete, 3. In the treatment with a supplemental bonding agent or the scraping off the basalsurface of artificial teeth, we obtained a higher bond strength with all kinds of teeth and foundfractures in artificial teeth or basal resin block, 4. These results show that proper treatments to thebasal surfaces of artificial teeth before curing enable sufficient bonding to the denture base resin.