Using the proper technology and cellulosic material (hydroxipropylmethylcellulose), it was possible to develop devices for the sustained release of the fluoride ion for application in the oral cavity. The drug used was sodium fluoride and the devices were prepared by compression or by coating of a nucleus, providing them with bioadhesiveness and adequate dimensions. As finished products, the devices fulfilled their objectives as they continuously delivered a small quantity of fluoride ions. As for fixation time, effective release was attained during 8 hours. In terms of therapeutic application, the device provides a series of advantages, the main one being the delivery of the therapeutic agent at the right site (on target) and its constant maintenance at this site in a small but effective concentration. The development of these devices opens up a whole new field of therapeutic systems.
Fluoride; Bioadhesives; Sustained release
