Occurrence of neurosensory disturbance after the use of articaine and lidocaine in the inferior alveolar nerve block: a double-blind randomised clinical trial.

This double-blind, randomised clinical trial aimed to find out whether there is a difference in the prevalence of neurosensory disturbance (NSD) between patients who received 2% lidocaine and those who received 4% articaine during inferior alveolar nerve blocks (IANBs). Patients who underwent third molar extraction were randomised into two groups. IANB was performed using 2% lidocaine in Group 1 and 4% articaine in Group 2. The occurrence of NSD was documented. Patients were visited within 48 hours and one week after the tooth was removed. The type of anaesthetic drug (4% articaine versus 2% lidocaine) was the study's predictive factor. A total of 2400 patients were studied in two groups (1200 in each group). The mean (range) age of the patients was 28.40 (18-44) years. Five patients (0.41%) in the lidocaine group and seven (0.58%) in the articaine group had NSD after injection (p = 0.77). The prevalence of NSD after IANB was no higher in the articaine group than in the lidocaine group.

Awareness of Orthodontic Treatments among School Teachers of Two Cities in Iran.

BACKGROUND AND AIMS: Since most orthodontic patients are children and adolescents, it is believed that teachers can help find these patients and make them aware of their orthodontic problems. Therefore, teachers are expected to have proper knowledge about these problems. The aim of this study was to determine teachers' awareness about orthodontic treatments in Tabriz and Saqqez and compare it in different educational levels. MATERIALS AND METHODS: A questionnaire was given to 384 teachers (204 in Tabriz and 180 in Saqqez) in randomly selected schools of different levels. The questionnaire had 17 questions in 3 sections, including general information, age, and costs of orthodontic treatments. The teachers' awareness in two cities was analyzed with independent t-test and in edu-cational levels with one-way ANOVA. RESULTS: About 94% of the participants believed orthodontic treatment consisted of arrangement of teeth with special braces. However, there was no significant difference between the two cities in general information (p=0.23) and the age suitable for orthodontic treatment (p=0.53). The differences in the teachers' awareness in three educational levels were not statistically significant between the two cities (p=0.23). CONCLUSION: Awareness of teachers about orthodontic treatment in Saqqez and Tabriz was not sufficient and different; 75% of the participants believed that high cost of orthodontic treatment is the main problem.