The role of guide planes in the retention of removable partial dentures

Savremeno tumačenje mehanizma retencije skeletirane proteze polazi od pretpostavke da putevi unošenja i pomeranja proteze zaklapaju određeni ugao. Protezu je moguće unositi u određenom pravcu, tek nakon formiranja vodećih površina, koje, isto tako, učestvuju pasivno u retenciji proteze. Htelo se dokazati hipotezu da formiranje vodećih površina i naginjanje modela u paralelometru omogućuje i krutim delovima skeleta da povećaju sposobnost proteze da se zadrži na nosećim tkivima. Istraživanja su obavljena na skeletima proteze istog dizajna i modelima sa i bez formiranja vodećih površina. Na univerzalnoj elektronskoj kidalici Instron 1185 izvršeno je ukupno 60 skidanja skeleta iz vertikalnog pravca pod različitim uslovima merenja.Modern understanding of the retention mechanism of partial denture assumes that the path of insertion and the path of displacement of denture form a definite angle. The denture is possible to insert in a given direction only after forming guide planes which, in the same time, passibly take part in retention of denture. The aim of this work was to test the hypothesis that the preparation of guide planes and bending of models in the surveyor brings, the rigid parts of framework to increase the ability of denture to be kept on supporting tissue. The research was performed on the frameworks of denture which were of same design and models with and with out preparation guide planes. Total of 60 framework removings from te vertical direction were made under the different conditions of the measurement, using universal electronic machines