engleski

Influence of different glass fiber reinforcements on denture base polymer strenght (Fiber reinforcements of dental polymer)

Aim: Assessment of flexural strength values of dental base polymers reinforced with different glass fibers ("dental" and "industrial" origin) after performed artificial ageing procedures. Methods: Three hundred specimens (dimensions 18 x 10 x 3 mm) were produced of denture base polymers reinforced with different glass fibers. The "short beam" testing method was used to determine the flexural strenght of the specimens after polymerization, immersion in water temperature 37C for 28 days, and thermo-cycling. Results: Flexural strength of the polymer specimens reinforced with glass fibers demonstrated rise of flexural strength values (103.10 - 163.88 MPa), no matter which type ("dental" or "industrial") fibers was used. Microscopic examination revealed partial bonding between the glass fibers and the polymer material. Conclusion: Both of the investigated glass fibers had similar strengthening effect, but due to the better investment/benefit ratio "industrial" glass fibers could be recommended for dental laboratory use. Prolonged polymerization of denture base materials should be proposed because it had direct impact on the improvement of flexural strength values.

dental materials ; polymers ; glass fibers ; dental prothesis ; mechanical phenomena

nije evidentirano