Estudo clínico randomizado da eficiência de cimentos de ionômero de vidro no controle da hipersensibilidade dentinária

Abstract

Dentin hypersensitivity is characterized as a painful reaction of exposed dentine to chemical, thermal, tactile or osmotic non-harmful stimulus. Among treatments, the glass ionomer cement acts in reducing pain through the obliteration of dentinal tubules. The aim of this randomized, double-blind and split-mouth clinical trial was to evaluate and compare the desensitizing efficacy of a resin modified glass ionomer cement, Clinpro XT® (3M Espe, Minnesota, USA), and a conventional glass ionomer cement, Vidrion R® (SS White, Gloucester, UK), at 6-months follow-up. Subjects should have at least two teeth in different hemiarchs with dentin hypersensitivity. Twenty patients with 152 hypersensitive teeth were randomly divided into two intervention groups. One group received the Clinpro XT and the other conventional glass ionomer cement Vidrion R. Prior to the desensitizing treatment, painful symptoms were assessed by tactile and air blast tests using the Visual Analogue Scale (VAS). Re-evaluations of the treatments occurred after 5 minutes; 7, 15, 21, 30, 90 and 180 days. The statistical analysis was performed using the Kruskal-Wallis, Friedman and Mann-Whitney analysis (a=5%). In both tests (tactile and air blast) there was significant reduction of painful symptoms immediately after application of materials (5 min). The median values of VAS score were statistically lower than baseline values during the 6-month follow-up (p<0,05). Besides, no significant differences were observed between the two types of glass ionomer cements evaluated with tactile and air blast test in all evaluation periods. Clinpro XT and Vidrion R demonstrated significant effects in reducing dentin hypersensitivity at 6- months follow-up.