Title :
In vitro tests to evaluate some dental composites
Author :
Chistolini, P. ; Bedini, R. ; Formisano, G. ; Albergo, G.P. ; Bossi, A. ; Caiazza, S.
Author_Institution :
Lab. of Biomed. Eng., Ist. Superiore di Sanita, Rome, Italy
fDate :
Oct. 29 1992-Nov. 1 1992
Abstract :
The mechanical properties of some composites for tooth restoration, SILUX PLUS (3M), ELIOMOLAR (Vivadent), PRISMA APH (Dentsply), HERCULITE XRV (Kerr), were evaluated by mechanical testing and scanning electron microscopy. A computerised material testing machine was used to subject Dumbbell-shaped specimens to tension tests, and cylindric specimens to compression tests. Tensile strength at break was calculated for each composite, for each composite repaired with itself, for amalgam and composite, for different composites in various combinations. Compression strength at break was calculated for each composite. The ultrastructural observations made on specimens tested for tensile strength revealed different fracture patterns, depending on composite combination. Those surfaces presenting the detatchement of large material particles are more susceptible to bacterial plaque adhesion.
Keywords :
adhesion; biomechanics; biomedical materials; composite materials; compressive strength; compressive testing; dentistry; scanning electron microscopy; tensile strength; Dentsply; Dumbbell-shaped specimens; ELIOMOLAR; HERCULITE XRV; PRISMA APH; SILUX PLUS; Vivadent; amalgam; bacterial plaque adhesion; compression tests; computerised material testing machine; cylindric specimens; dental composites; fracture patterns; in vitro tests; mechanical properties; mechanical testing; scanning electron microscopy; tensile strength; tension tests; tooth restoration; ultrastructural observations; Legged locomotion; Polymers;
Conference_Titel :
Engineering in Medicine and Biology Society, 1992 14th Annual International Conference of the IEEE
Conference_Location :
Paris
Print_ISBN :
0-7803-0785-2
Electronic_ISBN :
0-7803-0816-6
DOI :
10.1109/IEMBS.1992.5761780
