Acta Medica Medianae (May 2002)
INFLUENCE OF THE PROSTHESIS ADHESIVE GEL HYDRATION UPON SPECIFIC RETENTION FORCE OF THE TOTAL TOOTH PROSTHESES
Abstract
As the type of adhesive link upon the tooth surface and of the polymer applied for plastic tooth filing is still relatively unknown, a less known is an analogous appearance in the system of the impressed surface of the total tooth prosthesis (and/or mucus) - saliva.The aim of the paper is to examine the gel hydration of accessible "prosthesis adhesives" in the function of the defined time intervals of the water supply upon the specific retention force F of the experimental small blocks EP of familiar surface, made of polymethylmethacrylate (PMMA).For experiments in vitro an apparatus composition was made to provide for continuous water supply through a semi-permeable membrane as well as for dilution of the viscous gel made of water and prosthetic adhesive. Powered and paste adhesives were used.The results show that F is the smallest under the circumstances when the interpolated fluid between the EP and the apparatus membrane is distilled water in all the defined supply intervals (after 0-5 minutes, after 6-11 minutes and after 60 minutes of the supply at the temperature of 37° C).At the water supply from 0 to 5 minutes the highest values of F are registered for the gel "Super Corega" powder as revealed in the statistic importance of the differences for the tested couple "Super Corega" powder distilled water.After 6-11 minutes of water supply, the highest values of F are registered for the gel "Kukident" cream though the values are very close in the remaining two adhesives as well as confirmed by the t-test results that are still the highest for the treated couple "Kukident" cream - distilled water.In the conclusion it is emphasized that F is dependent upon the time interval of hydration and the prosthetic adhesive gel dilution (continual supply of the dispersing phase) whereas the induced differences at the level from which the process of separating dislocation up to a certain limit are compensated by a viscosity increase.
