Abstract: Objective To observe the effect of lidocaine spray on inhibiting pharyngeal reflex in patients with oral implantation. Methods 90 patients with pharyngeal reflex sensitivity who received dental implantation treatment were included in this study. These patients were randomly divided into observation group and control group (n = 45/group). In the observation group, 1.5% lidocaine injection was sprayed on the base of tongue, soft palate and pharynx. In the control group, 2% lidocaine mucilage was applied on the base of tongue. The number of nausea and vomiting, hypertension and satisfaction evaluation was recorded. Results There were significantly differences in the incidences of nausea and vomiting, hypertension and satisfaction evaluation between the two groups (P<0.05). Conclusions Lidocaine spray can reduce nausea, vomiting and hypertension on patients with pharyngeal reflex sensitivity and improve the comfort level during dental implantation treatment.

Key words: Dental implantation, Pharyngeal reflex sensitivity, Iidocaine spray, Nausea and vomiting, Hypertension