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MATERIALE PLASTICE ♦ 54♦ No. 3 ♦ 2017 477 Polymethyl methacrylate (PMMA) is still the most popular material used for denture fabrication since its introduction in 1937 [1]. It has the advantages of good esthetic characteristic, low water absorption and solubility, adequate strength, low toxicity, easy repair and simple processing technique. PMMA also has some problems regarding polymerization shrinkage, weak flexural, lower impact strength and low fatigue resistance [2-4]. Considering the fact that these types of materials have a wide range of applications, various efforts have been taken in order to improve the physical, mechanical and esthetical properties, including addition of metal wires or plates, fibers, and modification of chemical structure [5-9]. Also, this type of material can cause some side effects regarding their biocompatibility [10]. In recent years, thermoplastic resins or nylon polymers has attracted attention as a denture base material. Nylon is a generic name for certain types of thermoplastic polymers belonging to the class of polyamides. Polyamide resin was first proposed as a denture base in the 1950s [11]. Thermoplastic resins can also be used for manufacturing obturator prostheses, which are a variation of a full or partial dental prosthesis used in the field of maxillofacial surgery for rehabilitation of palatal defects after maxillectomy (Fig. 1). The main role of this type of prosthesis is to restore masticatory function and improve speech, deglutition and esthetics [12]. This paper presents experimental compression and traction tests of VertexTMThermoSense from Vertex-Dental B.V. VertexTMThermoSense is a thermoplastic material based on a compounded mixture of Polyamide and pigments used in the fabrication of removable full and Thermoplastic Materials Used for Fabrication of Maxillary Obturator Prostheses

Thermoplastic Materials Used for Fabrication of Maxillary Obturator Prostheses Experimental compression and traction tests