Data collection
anxiety, pain
The patients’ demographic information was recorded. The MDAS questionnaire (a simplified scale with five questions and scores ranging from one to five) and the STAI questionnaire (a scale consists of 40 questions and has a score range of 20 to 80) were used to assess the level of dental anxiety. The intensity of pain was measured using VAS, with scores ranging from 0 to 100 mm. All of the aforementioned scales were compiled into a single questionnaire, which was given to each patient four times. The first questionnaire was given to ever patient an hour before exposure to vapors in the waiting room (Phase I), and its results were used as baseline measurements. The second one was obtained 20 min after vapor exposure in setting rooms (Phase II).Following the completion of the dental procedures, the third questionnaire was completed (Phase III). The fourth questionary was obtained on the following day after dental procedures (Phase IV). Phases I and II were completed in the waiting room, while phases III and IV were completed in dental clinics. Two senior staff members were in charge of collecting and reviewing the questionnaires, and each was assigned to one of the study's groups. The same healthcare staff measured the patients' vital signs four times in the same order as the questionnaires. The SBP and DBP were measured in millimeters of mercury using a sphygmomanometer and stethoscope. The patients were asked to stand up straight, and the sphygmomanometer cuff was inserted around their upper left arms, with a 2.5-inch distance between the antecubital fossa of the arm and the lower edge of the cuff. The blood pressure was measured after the stethoscope was placed over the brachial artery. The HR, RR, and Spo