Evaluation of the effect of different methods using anesthetics during impression making on the gag reflex in edentulous patients

Abstract

Nausea is a defense mechanism in front of pharyngeal and throat stimulations and all dentists and a lot of dental students had this experience with patients who have a gag reflex. Many of the dentistry acts such as preparation of oral-radiography, impression, pharyngeal and throat examination, process of operative treatment close to posterior teeth cause stimulation of nausea. The aim of this clinical trial study is evaluation of the effect of different methods of using anesthetics during impression making on the gag reflex in edentulous patients. Materials & Methods: In this study, 35 samples of patients referred to the Prosthodontics Department of Dentistry Faculty with severe gag reflex symptoms in initial examination selected and then impression made. In first step when we preparing the alginate for impressions, lidocaine anesthetic added to mixture of alginate and water, and then impression of the patient's upper jaw made according to the standard procedure. In another method before the impressions, the posterior areas of the patient's palate stained by gel-benzocaien anesthesia and after 3 minutes impression made. In other method, the standard method of upper jaw impressions of the patient is done. In all stages, a person who donEt have a knowledge about study, evaluated the items in the checklist and noted the intensity of the gag in each group. The collected data analyzed statistically with software SPSS20. In this study, p-value less than 0.05 considered statistically significant. Results: Results of this study showed that 54.3% of patients participated in this study are woman and 45.7 % of them are man. Intensity of gag reflex when the posterior areas of the patient's palate stained by gel-benzocaien anesthesia before impression is non-reflex, when lidocaine anesthetic added to mixture of alginate impression is low and in normal impression mostly is high. Conclusion: Analysis of data indicate that intensity of gag reflex significantly is less respectively, in gel-benzocaine anesthesia, method that lidocaine anesthetic added to impression material of alginate and finally in impression with normal method.