Measuring Biting Force of Poly-amide Complete Dentures

Polyamide resins used in dentistry exhibit high flexibility, physical strength, heat and chemical resistance and the exceedingly rare allergy response. Although flexural strength, modulus of elasticity and rigidity of nylon (polyamide) denture base materials are relatively low, they demonstrate great impact strength, toughness, and resistance to fracture. It was suggested that by adding glass fibers to polyamides, their stiffness and other mechanical properties could be increased. The flexural properties of nylon denture base materials has promoted their usage only in conditions like unyielding undercuts, pronounced tuberosities, tori and bulging alveolar ridges. In 2013 Wadachi etal compared rigidity of polyamide and PMMA when used as a denture base material and concluded that; the modulus of elasticity of polyamide was very low in comparison to PMMA and was lower than ISO standard, and so they recommended that polyamide to be used as a denture base material it should be reinforced with metal frame