Product developed by Nacional Ossos. THE PRE-MOLAR MODEL WITH GUM developed with state-of-the-art technology and a rigid quality system for the benefit of students, academics, researchers and dental health professionals. Made of polyurethane - material very similar to natural human bone type 2 - it is used in theoretical and practical studies in the area of Dentistry, replacing the use of bones of corpses. It also makes possible to avoid the training of surgical techniques in the needy population.