Margins Complete But Not Sharp

Thick blood/saliva pooled around the preparation +

Rinse and dry the prepared area and stop any bleeding by using appropriate retraction technique and a hemostatic agent. Liquids or pastes based on aluminum chloride, aluminum sulfate, or iron sulfate are suitable hemostatic agents.

Insufficient retraction +

Retract gingival tissue to entirely capture the prepared area. Retraction cords as well as retraction pastes are suitable.

Inhibition of setting due to use of acidic retraction materials/hemostatic agents like aluminum or ferric salts +

Thoroughly rinse preparation with water and dry before taking the impression.

Inhibition of setting of VPS impression material due to contact with sulfur from latex gloves. +

Use gloves which do not contain traces of sulfur, e.g. nitrile gloves.

Working time exceeded, flowability already impaired +

Select material with sufficient working time and pay attention to storage temperature. Working times are reduced due to higher temperatures of the product, while intra-oral setting times might be longer if the temperature of the product is lower.

Impression material stored at too low temperature +

Temperature influences the viscosity. Store impression material at room temperature. Lower temperatures might lead to higher viscosities.

Incorrect storage conditions of the final impression +

After disinfection rinse impressions with water and dry before sending it to the lab. Store impressions at room temperature and away from direct sunlight.

Inadequate disinfection +

Use recommended disinfectants. Follow the manufacturers’ instructions for use. Do not exceed the immersion time.