Stanković Dragutin,
Mladenović Dragan,
Ristić Kitka

MAdicAl FAculty, clinic oF StoMAtology, dep. oF pRoStHodonticS, SeRBiA, niŠ

In the sense of betterment of wettability of polymethyl metacrylat (PMA) and enlargement of biophysical component of total retention potential of full denture (FD), there is in literature described quite a number of trials to enlarge specific surface energy.
The aim of the paper is estimation of wettability of experimental plates (EP) of PMA depending on their surface treatment and surface voltage (SV) of applied experimental fluid (EF). Estimation of wettability of EP was performed with application of particular measuring equipment and through series of measuring diameters of drops formed by pouring out, under identical conditions, on surfaces of given ones.
In our experiments, optimum time interval of sand blasting is 40 s for all EP subjected to this form of mechanical change of surface structure by which there is intermediary influence too on change of level of acrylat surface energy.
Higher degree of wettability of metallized EP is explained due to enlargement of their surface energy on border surface surrounding air -solid body. In the case of soft acrylats, there seems to exist their bigger affinity in relation to molecules of adhesive by which better wetting is achieved.

Кеу words: retention, adhesion, full denture, wettability