The comparison of flexural strength between two different pmma based materials

Flexural strength is important to define the strength of prosthetic construction, especially in a long term one.

The comparison of flexural strength between two restorative provisional materials: polymethyl methacrylate and urethane dimethacrylate.

In this study were included 20 specimens, 10 for each group. These specimens were stored in artificial saliva for 7 days, then they were rinsed and dried. Flexural strength were calculated by using 3 point test in the universal machine. The data were analyzed with t-test. Results. The average value of flexural strength of specimens made of polymethyl methacrylate (134,4 MPa) was higher than the flexural strength of specimens made of urethane dimethacrylate (107,5 Mpa).

Inside the limits of this study we could conclude: the flexural strength of Polymethyl Methacrilate is higher that the flexural strength of urethane dimethacrylate. Polymethyl methacrylate can be used as a better provisional restorative for a long period of time, for long span prostheses or in patients with parafunctional habits.