Effect of Water & Water Substitutes on strength of Die Materials Год выпуска: 2015Автор: Sunil Dhaded and Neha DhadedИздательство: LAP Lambert Academic PublishingСтраниц: 84ISBN: 9783659480942Описание Gypsum and its products have been used since centuries. In dentistry it served mainly for the purpose of making models and as an adjunct to various dental laboratory operations that are involved in the fabrication of various oral and maxillofacial prosthesis. Both gypsum and non-gypsum materials are used for making dies. Die materials tend to fracture while separating from elastomeric impressions especially made of long and narrow tooth preparations. Therefore, the exact time period for retrieval of the cast from the impressions is critical. At the same time casts are subjected to considerable flexural constraints when removed from impressions.The strength of the die material is also reported to be dependent on the type and amount of water and water substitutes used. The strength of the gypsum product is generally expressed in terms of compressive strength. Compressive strength gives a better indication of surface hardness. The higher the compressive strength of the hardened mass, the...
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Юлия Добрый день, Юля! Я сегодня защитила диплом после вашего сопровождения на отлично :-) Хотела сказать Вам ОГРОМНОЕ спасибо за помощь! Вы мне помогали с сопровождением курсовых работ на протяжении всего срока моего обучения. Без Вашего участия мне было бы в сто раз труднее, ведь я работаю и времени на сопровождение курсовых и диплома всегда катастрофически не хватало. Так что в том, что я закончила этот университет есть большая доля и вашего участия. Ещё раз огромное Вам за это спасибо! Будьте счастливы и удачи Вам! При случае, буду рекомендовать Вас своим знакомым, кому понадобятся подобные услуги ;-)
