Effect of phosphate ester addition on transverse strength and hardness of heat cured acrylic denture base material

Saad Abed Karkosh, Zahraa; M.A. Hussien, Basima

	Effect of phosphate ester addition on transverse strength and hardness of heat cured acrylic denture base material
Journal of baghdad college of dentistry
Article 1, Volume 30, Issue 2, 2018, Pages 5-9
Authors
Zahraa saad abed karkosh; Basima M.A. Hussien
Abstract
Background: acrylic resin denture base consider a common denture base material for its acceptable cost, aesthetic and easy processing but still has disadvantages including easy of fracture and low impact strength. Material and method: The experimental group was prepared by addition of 15% phosphoric acid 2-hydroxyethyl methacrylate ester (PA2HEME) with polymethyl methacrylate monomer; the experimental groups was compared with the control one. The specimens were prepared according to ADA specification No. 12 with dimension 65 mm x 10 mm x2.5 mm (length x width x thickness respectively). The prepared specimens were tested by three-point flexural strength utilizing Instron Universal Testing Machine (WDW, Layree Technology Co.), Shore D hardness tester used to measure hardness test. Statistical analysis used student T- test, mean and standard deviation. Results: The result of PA2HEME group showed high significant reduction comparing to the control group for both transverse strength and hardness test. Conclusion: Mixing 15% of PA2HEME with 85% methyl methacrylate (MMA) can reduce the mechanical properties of new modified polymethyl methacrylate (PMMA) acrylic resin
Keywords
phosphoric acid; hydroxyethyl methacrylate ester; transverse strength and hardness

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