Naslov
Flexural strength of E-glass fiber reinforced dental polymer and dental high strength resin

Autori
Vojvodić, Denis ; Matejiček, Franjo ; Schauperl, Zdravko ; Mehulić, Ketij ; Bagić-Čuković, Ivana ; Šegović, Sanja

Izvornik
Strojarstvo (0562-1887) 50 (2008), 4; 221-230

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
dental polymers; composites; flexural strength

Sažetak
Fractures of denture base polymer material are one of the most frequent reasons for repair of removable dentures. Therefore, there is a continuous strive to strengthen them, and polymer materials of high resistance to fracture are being developed. The aim of this study was to determine the flexural strength of denture base polymers reinforced with industrial E-glass fibers and high impact strength resin material using the thress point bending test. Specimens were tested after polymerization and after artificial ageing performed by storage at 37º ; ; C temperature during 28 days and thermocycling. Microscopic examination was performed to determine the quality of bonding between glass fibers and matrix. The study showed significantly higher values of flexural strength (130 – 164MPa) of glass fiber reinforced specimens compared to the un-reinforced specimens (92 – 123MPa) control group, matching those of high impact strength resin (146MPa). Between the groups of samples tested after polymerization and storage in water at 37º ; ; C during 28 days there was no statistically significant difference in flexural strength values while samples tested after thermocycling unexpectedly revealed significantly higher values. Composite materials and high impact strength resin revealed similar results of flexural strength both being acceptable for clinical use. Obtained results suggest that the increase of temperature had the effect of prolonged polymerization which resulted in a decrease of residual monomer volume, enhancing polymer mechanical properties.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo, Dentalna medicina

POVEZANOST RADA