Subgingival scaling is one of the most important components of periodontal treatment. There are a lot of methods and different pain experience accompanying it. It seems that the Vector system will minimize negative pain sensations during scaling.Objectives: Comparing of pain experience during subgingival scaling with Vector system (Duerr) and ultrasonic device (EMS). Material and Methods: The investigation was carried out by 4 researchers in the group of 30 patients aged 29-78, both genders, with established, chronic periodontitis. On the baseline, the level of fear was defined in every participant by Corah scale. On the single visit, 3 comparably deep pockets (5-7 mm) in two sides were scaled, one side with the Vector method (A-right side), the other with ultrasonic device (B-left side). After the procedure, patients estimated subjective pain sensation felt during the scaling in the side A and B. To evaluate the intensity of pain the verbal (Hochmann) and visual /analogous, FAS/ scales were used. The differences connected to gender, age, and patients fear before treatment were taken into consideration. Statistical analysis was carried out with Wilcoxon`s, x2 and t-student tests, also ANOVA Kruskal Wallis test. Results: 1. There were no remarkable differences between women and men in emotional attitude prior to dental treatment (x2=0,475, p=0,491). 2. With Vector system 20% of patients and with scaler group 6.66% felt no pain, which was statistically significant. 3. Men admitted feeling more pain (verbal scale p=0,0015, visual scale p=0,00002) than women. 4. High statistical correlation between verbal and visual scales was confirmed (p=0,001). Higher level of pain was found in pockets operated with conventional scaler. 5. The treatment with Vector system required about twice longer time then in the scaler group. Conclusions: Vector system seems to be very useful in subgingival scaling, because it minimizes the negative pain feeling.

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