[The effect of long-term water storage on some mechanical properties of denture base material]. / A hosszantartó vizes tárolás hatása a protézis alaplemezanyag egyes mechanikai tulajdonságaira.

Flexural strength and Hounsfield impact resistance of a denture base material were yearly tested in a time scale of 5 years. Impact energy for fracture was continuously stable during the 5-year-long storage in water. Forces caused fracture in wet circumstances were between 60-80 N during the observation period. A significantly (p < 0.001) higher forces were measured at fractures for dry specimens in comparison to the wet polymer material in some years.

[Bonding strength and fracture resistance of artificial teeth in dental prostheses]. / Protézismüfogak szakítószilárdsága.

Debonding of plastic teeth from its denture base has been frequently experienced in our prosthetic practice. Three of nine products investigated have fulfilled the requirements for bonding according to ISO test 3336. Loading forces necessary to produce fractures varied between 170-810 N within the tooth and 80-230 N at the tooth-denture base interface. Comparative significances were noted for the mean breaking force against fracture and debonding when comparing the resistance of "Acry Rock" to the other eight materials tested. Maximizing the extension of the polymerization surface through a larger surface area of individual teeth seemed to be a significant factor in the determination of the debonding force necessary to produce fracturing.