A-SILICONE IMPRESSION MATERIAL (CENTURY88) MADE IN GERMANY

A silicone impression material is an elastomeric dental impression material used to accurately reproduce the teeth, gums, and surrounding oral tissues for making dental restorations such as crowns, bridges, dentures, implants, and orthodontic appliances.

There are two main types:

• Condensation silicone (C-silicone): Sets through a condensation reaction and releases alcohol as a by-product, which can cause slight dimensional changes over time.
• Addition silicone (A-silicone or Polyvinyl Siloxane, PVS): Sets through an addition polymerization reaction without producing volatile by-products, resulting in excellent dimensional stability and high accuracy.

Description of A-Silicone (Addition Silicone)

A-silicone, also known as Polyvinyl Siloxane (PVS), is a high-precision elastomeric impression material widely regarded as the gold standard for fixed prosthodontic impressions.

Characteristics:

• Excellent dimensional stability
• High elastic recovery after removal from the mouth
• Outstanding detail reproduction (captures fine surface details)
• Pleasant odor and taste
• Good tear resistance
• Multiple viscosities available (putty, heavy body, medium body, light body)
• Can be poured multiple times without significant distortion
• Compatible with most gypsum products

Advantages:

• Highly accurate impressions
• Minimal shrinkage after setting
• Long working and storage stability
• Comfortable for patients
• Suitable for crowns, bridges, implants, and precision prosthodontics

Disadvantages:

• Higher cost than many other impression materials
• Naturally hydrophobic, although modern formulations are often improved to be more hydrophilic
• May require careful handling to avoid contamination by latex gloves, which can inhibit polymerization in some formulations

Common Uses:

• Crown and bridge impressions
• Implant impressions
• Inlay and onlay restorations
• Veneers
• Fixed and removable prosthodontics
• Orthodontic models

A-silicone impression materials are preferred in modern dentistry because they provide excellent accuracy, dimensional stability, and reliable reproduction of fine details, making them ideal for precise dental restorations.