Efeito do cimento de óxido de zinco e eugenol sobre o tratamento da hipersensibilidade dentinária

Abstract

This study evaluated the effect of cement zinc oxide and eugenol in the treatment of dentin hypersensitivity. In the first step, in vitro, 10 premolars were used which were cut to obtain specimens. Subsequently, they were divided into two groups of five elements and exposed to acid etching. The test group underwent application of a cement layer of zinc oxide and eugenol on dentine, while the control group did not suffer this application layer. After a storage period of seven days, the test group had its layer of cement removed. Both groups were seen in scanning electron microscopy for evaluation as to the openings of dentinal tubules. Already in the in vivo, 36 elements were used in dental patients with dentine hypersensitivity diagnosed from stimuli of air jet and pain measured using a Numerical Rating Scale. Scheme of "split mouth" was used, where the test side was treated with cement and zinc oxide eugenol, whereas the control side was treated with dentifrice containing potassium nitrate and 5% sodium fluoride). The collected data were statistically analyzed by parametric Student's t test paired. The results showed that the cement zinc oxide and eugenol was effective in the treatment of dentine hypersensitivity, giving a result above the dentifrice containing 5% potassium nitrate after 7 days (68.52% improvement of pain against 11.06% respectively, being statistically significantly ƥ <0.001). It is believed that the result achieved was due, at least in part to the partial obliteration of dentinal tubules viewed by scanning electron microscopy.