Fulltext

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

Zahraa saad abed karkosh زهراء سعد --- Basima M.A. Hussien

Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد
ISSN: 16800087 Year: 2018 Volume: 30 Issue: 2 Pages: 5-9
Publisher: Baghdad University جامعة بغداد

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 2-hydroxyethyl methacrylate ester --- transverse strength and hardness