Our research and observations were performed during 2008 - 2010 at the Faculty ofVeterinary Medicine, on a number of 10 dogs and 5 cats, of different breeds, age and sexes, presentedat the clinic for diagnosis and prosthetic treatment. All dental impressions were made for partiallyedentulous prosthetic fields. The impression material well prepared is placed in the mouth after apreliminary tranquilizer, so that the dental impression to restore as closely as possible the particulartype of occlusion. For dogs, we obtained good results with Zeta plus condensation silicone, which hasa high fidelity, and setting time is 1.5-2 minutes, shorter than the addition silicon.In cats and small dogs (2 cases), we obtained good results with Oran wash hydrophilic additionsilicone, which setting time is 2 minutes, is resistant to breaking and prevents model distortion.Because of its stability, the model casting can be done up to seven days. Another advantage is that itallows very accurate models, with many micro details, essential in the specimens with menialdentition. For more accurate information to be collected by dental impressions, these must include thesupporting area and the periphery prosthetic field tissues.