One of the biggest problems in the past for addition silicones was their hydrophobic character. Due to the way of production, dentists had to be careful and provide a dry area. Today, thanks to advanced technology, dentists are past that problem. These materials can be very costly.
Uses:
As mentioned the addition silicone impressions are often used in prosthodontics. They are ideal for removable restorations, also for the fixed ones. Another great advantage is that dentists can use them when they need several molds from one single impression. Bite registration impressions are another indication. The only problem with these impressions is when the dentist can’t have a good moisture control.