IRM Mixing Techniques and Components

The video tutorial demonstrates the mixing of Reinforced Zinc Oxide Eugenol filling material, known as IRM. It covers the components, including zinc oxide powder and eugenol liquid, and the tools required for mixing. The process involves fluffing the powder, measuring it with a spoon, and mixing it with the liquid using a stropping motion to achieve a parchment-like consistency. The tutorial also explains how to adjust the mixture's consistency and form small pellets for temporary dental restorations.

What is the primary component of the powder used in IRM?

• Glass ionomer

• Polymethyl methacrylate

• Zinc oxide

• Eugenol

What is the characteristic smell of the liquid used in IRM?

• Citrus

• Cloves

• Lavender

• Mint

What is the role of polymethyl methacrylate in the IRM powder?

• To increase the setting time

• To strengthen the material

• To provide color

• To act as a filler

Which tool is NOT required for mixing IRM?

• Dispensing spoon

• Chilled slab

• Cement slab

• Cement spatula

Why is it important to fluff the powder before using it?

• To change its color

• To increase its density

• To make it less dense

• To activate its chemical properties

What is the recommended ratio of liquid to powder when mixing IRM?

• Three drops of liquid per spoonful of powder

• One drop of liquid per spoonful of powder

• Two drops of liquid per spoonful of powder

• Equal parts liquid and powder

What is the final consistency of the IRM mixture compared to?

• Parchment

• Zinc phosphate cement

• Glass ionomer

• Clay

What is the purpose of the stropping motion during the mixing of IRM?

• To cool the mixture

• To incorporate air into the mixture

• To press the material down and spread it thinly

• To add more liquid to the mixture

What should you do if the IRM mixture is too dry?

• Add more powder

• Add more liquid

• Use a chilled slab

• Increase the mixing time

What is the purpose of creating small pellets from the IRM mixture?

• To store the mixture for later use

• To make it easier to handle

• To test the mixture's strength

• To place into the cavity for restoration