Stone Cast Discrepancies

Outgassing of hydrogen when using VPS impression materials. +

Follow manufacturer´s instructions for use on minimum waiting time to pour cast.

Bump/swelling in gypsum model. +

Can occur through invisible voids under the surface of the impression. Thoroughly inspect the impression to avoid undetected voids.

Cast not made according to preparation guidelines and lacks detail +

Provide all relevant information to the dental lab: Impression material used including fabrication date, additional surfactants for pouring if needed, etc.