Veza veštačkog zuba i polimerne baze proteze : uticaj tehnoloških parametara pripreme na čvrstinu veze
Paulin, Martin ...
The aim of this study was to evaluate the artificial tooth and polymer basis bond and to measure the formatted gaps between tooth and basis. For this purpose 4x12 acrylic models with the same ...dimensions were made. They were classified into four groups depended on type of surface pre-treatment: A (untreated), B (mechanically prepared), C (moistened using monomer), D combination of: B+C. Afterwards, the models were prepared for microstructural characterization by means of optical and scanning electron microscopy and, secondly, for compressive testing. The gap measurement's results of the universal F-test show that there is a statistically significant difference between models (f = P=0.0001), (A>B=C>D). The combination of D pre-treatment mechanical and chemical pre-treatment fs surface led to the highest bond strength between acrylic tooth and denture base. The combination of D pretreatment influenced on the gap (artificial tooth/polymer basis) formation with average value 68.250 ▫$mu$▫m what is 70 % of the gap on the untreated samples(average value 103.75▫$mu$▫m). Furthermore, the measured compressive strength was above 6000 N/mm2 on the mechanically-chemically treated these D samples, meanwhile on untreated A samples only 3200 N/mm2.
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