Izvorni znanstveni članak
Flexural Strength of Denture Base Materials
Ante Lončar
Denis Vojvodić
Franjo Matejiček
Vjekoslav Jerolimov
Sažetak
Fractures of 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 fl exural strength of Ivocap “Plus” High Impact (Ivoclar Vivadent, Schaan, Liechtenstein) material using the method of “short bar” together with the injectional method of polymerization, as well as comparison of fl exural strength of Meliodent Heat Cure material with the use of classic pressure-heat polymerization, immediately after polymerization and after artificial ageing by storage at 37şC during 28 days and thermocycling. The study showed significantly higher values of fl exural strength (130.1-150.65 MPa) of Ivocap “Plus” compared to Meliodent (109.2-110.3 MPa) in groups of samples tested after polymerization and storage in water. In the group of samples tested after thermocycling there was no significant difference (148.75 compared to 156.25 MPa). Furthermore, there was no significant difference between the samples of same material although the procedure of artifi cial ageing was performed.
Ključne riječi
polymers; dental materials; dentures
Hrčak ID:
11574
URI
Datum izdavanja:
1.6.2006.
Posjeta: 3.617 *