[Comparison of the analgesic efficacy of odontopaste[R] and a compound with similar formulation as intracanal medicaments]

Different medicaments are used for pain reduction following an emergency endodontic treatment. The aim of this randomized controlled clinical trial was to evaluate the analgesic efficacy of Odontopaste[R] and a corticosteroid-containing compound used as intracanal medicaments in between root canal therapy [RCT] appointments. In this randomized controlled clinical trial, 120 lower first and second mandibular molars with spontaneous pain and sensitivity to percussion were selected and divided into three groups of 40. After root canal preparation, patients were randomly assigned to one of the three groups. Root canals were dressed with Odontopaste in group 1, with an intracanal medicament in group 2 and with placebo in group 3. Patients determined their degree of pain intensity and percussion sensitivity on a Heft-Parker VAS diagram before the first appointment and 24 hours and 7 days post-treatment. Data were analyzed using ANOVA, Tukey's test and Welch test. The mean spontaneous pain and percussion sensitivity scores at 24 hours after the first appointment in groups 1 and 2 were significantly lower than in group 3 [P<0.001]. No statistically significant difference was found between the groups after 7 days neither in spontaneous pain nor in percussion sensitivity. Odontopaste[R] and the intracanal medicament caused a statistically significant reduction in postoperative pain and percussion sensitivity at 24 hours but there was no statistically significant difference at 7 days with the placebo

In-vitro evaluation of the effect of MTA setting on apical microleakage of open apex canals with MTA apical plug

Mineral Trioxide Aggregate [MTA] has a high clinical success rate when used as the apical plug. The conventional method of using MTA as an apical plug is doneduring two treatment sessions. This study aimed to evaluate the possibility of complete filling of root canal with gutta percha and AH26 sealer immediately after the placement of MTA plug. A total of 88 single-rooted teeth were selected for this experimental study. The teeth were prepared and randomly divided into two groups of 40 each. Four teeth were considered as the positive control group and the remaining 4 as the negative controls. In group 1, MTA apical plug was placed, specimens were stored in saline solution for 24h and then filled with gutta percha and AH26 sealer. In the 2[nd] group, the roots were filled immediately after the placement of MTA. In the positive control group, the root canals were left unfilled and in the negative control group, root canals were filled with gutta percha and sealer. The specimens were then immersed in 1% methylene blue, demineralized in 5% nitric acid and cleared in methyl salicylate. Dye penetration was measured by a stereomicroscope in micrometer. T-test was used for statistical analysis. The mean dye penetration was 7813 microm in the first and 9152 um in the second group. According to t-test, the 2[nd] group had significantly greater microleakage than the first group [P<0.05]. MTA needs to be exposed to moisture for final setting and root canal obturation must be delayed until complete setting of MTA