RESUMEN
The aim of our research was the clinical estimation of ultrasound efficiency during root canal treatment at pulpitis, periodontitis. 446 root canals of 164 single and multi-rooted teeth were used for this study. Teeth were treated and monitored for 3 months, 6 months, 9 months, 1 year, 1,5 year, 2 year. All teeth with periapical destructive changes had periapical destructive lesions in x-ray imaging. Patients were divided into two groups. Endodontic treatment of first group combined mechanical and chemical processing with ultrasound divise Pieson Master-400, Endosonore profiles, sodium hypochlorite (NAOCI) +canal lubricant (EDTA). In a second group we used the traditional layout of treatment pulpitis end periodontitis. According to our results, in a first group the X-ray improvement was - after 3 months in I group in 53 (64,6+/-0,7%) patients, in the II group - 44 (53,65+/-2,3%); after 6 months in the I group - 59 (71,9+/-2,2%), in the II group - 56 (68,29+/-0,54%); after 9 months in the I group - 62 (75,6+/-0,56%), in the II group - 56 (68,29+/-0,54%); after 1 year in the I group - 70 (85,36+/-0,18%), in the II group - 63 (76,83+/-0,53%); after 1,5 year in the I group - 76 (92,68+/-2,8%), in the II group - 65 (79,26+/-0,5%); after 2 years in the I group - 77 (93,9+/-2,7%), in the II group - 65 (79,27+/-2,11%). We can conclude, that the ultrasound preparation of the root canal leads us to the considerable lowering of complication of endodontic treatment, though doesn't guarantee their complete absence. In the end we can resume that the usage of ultrasound preparation during endodontic treatment considerably exceed the effectiveness of chemical irrigation of root canal. That is because of its bactericide effect, opening and cleaning root canal system, creation favorable conditions for hermetic filling of root canal after removal of smear line.