Impression Material

Silicones and impression materials in the laboratory

This category extends beyond materials used for taking impressions in the clinic. Many of its silicones are intended for laboratory procedures. Kneadable putty can be used to make silicone indices, guides and supporting moulds that preserve and transfer shapes during fabrication.

Choosing consistency and hardness

Laboratory putties vary in hardness, elasticity and working time. A firmer material can provide a stable index, while a more flexible silicone may be easier to remove around undercuts. Products intended for duplication or gingival masks are not necessarily interchangeable with general laboratory putties.

Mixing, curing and accuracy

Accurate proportioning of base and catalyst, or use of the designated automix system, is important. Follow the manufacturer’s working and curing times. Before further processing, ensure that the material has cured fully and check for voids or distortion.

From impression to finished model

The recorded shape is often transferred to a physical model using dental stone. Dental model systems may also be needed when removable dies are required. Choose products according to the specific process and system compatibility.

Frequently asked questions

What is laboratory putty used for?

It is commonly used to make silicone indices, guides and supporting forms in dental laboratory procedures. Specific indications depend on the product.

Are all silicones in this category suitable for intraoral impressions?

No. Many are intended specifically for laboratory use. Always check the manufacturer’s intended use before any clinical application.