California Registered Dental Assistant (RDA) Written Practice Exam

What should be placed between two models when they are trimmed together?

1. A thin sheet of metal

2. Plastic film

3. wax bite

4. Nothing

The correct answer is: wax bite

A wax bite is typically placed between two models when they are trimmed together to create proper spacing and alignment. This is because wax is easily moldable and allows for fine adjustments to be made in order to achieve a precise fit between the models. A thin sheet of metal may be too rigid to make these adjustments and could potentially damage the models, while plastic film may not provide enough stability. Leaving nothing between the models could result in inaccuracies and imperfections in the final product. While all options may potentially be used in certain situations, in general, a wax bite is the most commonly recommended material for this purpose.