Introduction: This study was conducted to assess the microleakage in Er:YAG laser-ablated and bur-prepared root and coronal dentin cavities using self-etch and total-etch adhesive systems. Methods: Sixty extracted caries-free human third molars were sectioned for dentin exposure. Then, two standard class V cavities were prepared in the root and coronal dentin of each tooth and allocated to one of the following conditioning groups randomly (n=12/Group): G1: Diamond bur for cavity preparation and single bond (BESB) etch-and-rinse adhesive for bonding, G2: Er:YAG laser (160 mJ, 20 Hz, 29.88 J/cm2 ) and SB (LESB), G3: Er:YAG laser and SB without acid etching (LSB), G4: Diamond bur and Clearfil SE Bond (BCSE) self-etch system, and G5: Er:YAG laser and Clearfil SE Bond (LCSE). The cavities were filled with Z100 composite resin. Dye penetration was assessed after thermocycling. Data analysis was done by Kruskal–Wallis and Mann–Whitney U tests. Statistical significance was set at P<0.05. Results: The results showed there were no statistically significant differences in microleakage between the two preparation methods (bur and laser) or the bonding agents applied (P>0.05). Regardless of the cavity preparation method, dye penetration was significantly higher in coronal dentin than in root dentin (P<0.05). Conclusion: The Er:YAG laser had the same efficacy as the conventional method for cavity preparation, and microleakage did not depend on the bonding agent. Microleakage was significantly higher in coronal restorations than in root restorations.
Background and Aim: Researchers have been in search of medications with less side effects to relieve pain after root canal therapy. This study aimed to assess the efficacy of premedication with oral dextromethorphan and Ibuprofen to decrease pain after endodontic treatment. Materials and Methods: This double blind clinical trial was conducted on 45 patients. The selected teeth had irreversible pulpitis and spontaneous pain with no periapical lesion. The patients were randomly divided into three groups of 15. One-session treatment was scheduled for them and after signing informed consent forms, the patients received a single dose of dextromethorphan, ibuprofen or placebo one hour preoperatively. The severity of pain was measured before and two, four, eight and 12 hours after endodontic treatment using a visual analog scale (VAS). Two endodontists performed the treatments. The data were analyzed using the Mann Whitney, Kruskal Wallis and Friedman test. Results: The mean severity of pain in the dextromethorphan and ibuprofen groups was significantly different from that in the placebo group at the five assessment time points (P<0.05). The mean severity of pain was not significantly different between the dextromethorphan and ibuprofen groups at any time point (P>0.05). Conclusion: The results showed that the analgesic efficacy of dextromethorphan and ibuprofen was equally greater than that of placebo.
Objectives. This study aimed to compare the efficacy of calcium hydroxide (CH)/saline and CH/Artemisia persica (A. persica) essential oil as an intracanal medicament for radiographic resolution of periapical (PA) lesions in necrotic teeth. Materials and Methods. This randomized clinical trial was conducted on 22 patients with necrotic teeth and PA lesions presenting to two private endodontic offices. The patients were randomly divided into two groups (n = 11) to receive CH/saline (control group) and CH/A. persica essential oil (10%) (intervention group) as intracanal medicaments between treatment sessions. The size of PA radiolucency was measured on parallel PA radiographs taken before treatment and also at 1 and 3 months after completion of treatment. The mean time of healing of PA lesions was also compared between the two groups. Data were analyzed by the independent t-test, chi-square test, and Fisher’s exact test (alpha = 0.05). Results. No significant difference was found between the two groups regarding the changes in the size of PA lesions, relative healing percentage, and speed of healing, neither at 1 nor at 3 months postoperatively P > 0.05 . Regarding the presence/absence of clinical symptoms in the second treatment session, the intervention group showed greater resolution of symptoms, although the difference did not reach statistical significance P > 0.05 . Conclusion. According to the present results, it appears that the addition of A. persica essential oil to CH for application as intracanal medicament does not add any particular advantage.
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