The effect of topical anesthesia on patients with dental anxiety

INTERVENTION: Anesthesia, Dental Drug Topical anesthesia with 20% benzocaine (20 subjects); Topical anesthesia with the combination of lidocaine (25 mg/g) and prilocaine (25mg/g) (20 subjects); Control: Ointment without an active ingredient (placebo) (20 subjects); The application of topical medications will be followed by anesthetic injection of the major palatal nerve with 2% lidocaine hydrochloride associated with 1: 100,000 norepinephrine (all the subjects). CONDITION: Dental Anxiety Dental anxiety ; Dental Anxiety PRIMARY OUTCOME: To evaluate the effect of anxiety on pain perception after topical anesthesia immediately after the injection, using quantitative (hemodynamic variations) and qualitative (verbal pain scale) methods. The significance level among groups will be set as 5%. SECONDARY OUTCOME: To evaluate whether topical anesthesia has a physiological or a psychological effect on pain perception in dental anxiety patients, using quantitative (hemodynamic variations) and qualitative (verbal pain scale) methods. The significance level among groups will be set as 5%. INCLUSION CRITERIA: ASA I Need for extraction of bilateral superior third molars.