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An impression body, made from alginate impression material. A custom dental model or plaster cast. A dental impression is a negative imprint of hard and soft tissues in the mouth from which a positive reproduction, such as a cast or model, can be formed. It is made by placing an appropriate material in a dental impression tray which is designed ...
Equine dentistry was practiced as long ago as 600 BCE in China, and has long been important as a method of assessing the age of a horse. [1] This was also practiced in ancient Greece, with many scholars making notes about equine dentistry, including Aristotle with an account of periodontal disease in horses in his History of Animals, and in Rome with Vegetius writing about equine dentistry in ...
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Horse teeth often wear in specific patterns, based on the way the horse eats its food, and these patterns are often used to conjecture on the age of the horse after it has developed a full mouth. As with aging through observing tooth eruption, this can be imprecise, and may be affected by diet, natural abnormalities, and vices such as cribbing .
Examples include specific locations and sizes of cavities, cracked teeth, excessive erosion, abrasion and many more. Conventional dental impressions are made by placing an impression material loaded on an impression tray over the dental arches. As it sets a negative imprint of the soft and hard tissues in the mouth.
To create the material, the user simply mixes a colored putty (often blue or pink) with a white putty, and the chemical reaction begins. PVS with a wide variety of working and setting times is available commercially. [3] Final set is noted when the product rebounds upon touching with a blunt or sharp instrument.
Impression materials are designed to be liquid or semi-solid when first mixed, then set hard in a few minutes, leaving imprints of oral structures. Common dental impression materials include sodium alginate, polyether and silicones. Historically, plaster of Paris, zinc oxide eugenol and agar were used.
Veterinary dentistry involves the application of dental care to animals, encompassing not only the prevention of diseases and maladies of the mouth, but also considers treatment. In the United States , veterinary dentistry is one of 20 veterinary specialties recognized by the American Veterinary Medical Association .