Mechanical properties of polymethyl methacrylate- ketoprofen mixture in stent and splint preparation

الملخص EN

Contribution of engineering to other fields is authentic and increasingly growing.

The field of dentistry is an example of fields that are in need for wide and deep cooperation with engineering disciplines.

The current work is aimed to investigate the possible change in mechanical properties and surface roughness of a widely used material in dentistry applications, Acrylic resin (Polymethyl methacrylate) after mixing it with Ketoprofen (2 % to 10 %).

This mixing is sought to diminish the possible irritation that could be developed by patients sensitive to Acrylic resin (PMMA) usage.

The effect of soaking the material in different solutions having variety of pH values was taken into consideration to simulate the actual service environment.

Compressive, bending, and Izod impact tests were carried at room temperature for specimens of PMMA containing different fractions of Ketoprofen (0 %, 2 %, 5 %, and 10 %).

Surface roughness were measured (Ra) along a period of 5000 hours of soaking in several solutions with different pH values (2, 5, 7, and 11).

Only bending strength, among mechanical, was slightly increased with the increased fraction addition of Ketoprofen.

Surface roughness was slightly affected with the addition of Ketoprofen.

Soaking specimens in different solutions with varying pH showed some tendency to become slightly rougher as the solution has stronger pH value.

This effect was more obvious in specimens containing 2 % Ketoprofen.