Silicone rubber is a high-molecular synthetic rubber, which is an elastic and irreversible impression material. In recent years, it has been widely used in the medical field. As an impression material, it is mainly used for its good elasticity, toughness and strength. also. Silicone rubber impression also has the advantages of good fluidity, plasticity, and small volume shrinkage. The impression made has high accuracy and good chemical stability. It does not react with the model material and is easy to demold. It is currently used in impression materials. The more ideal category.

Application scope:

Repair: such as porcelain bridge crowns, partial dentures, etc.

Orthodontics: lingual and transparent correction model equipment, individual mold preparation, etc.

Classification:

1. Shrinkage of silicone rubber. The precision is the lowest among silicone rubber impression materials.

2. Add clustering silicone rubber. One of the most precise materials. very stable. It is one of the preferred impression materials. The price is higher.

3. Polyether rubber. It is one of the most precise materials, with good fluidity and high price.

Qualified silicone rubber impression standards:

1. The final impression should cover the entire crown and gingival margin

2. Complete dentition

3. The crown and gingival margin are clear and complete, without air bubbles, defects and folds.

4. The anatomical structure of the occlusal, cheek, and tongue sides of the teeth is clear.

5. There is no demoulding.

6. The final print must be closely adhered to the first print.

7. If there is a third molar, the impression should include at least one-half of the mesial tooth.

8. Even single jaw treatment requires a full-mouth impression.