Objective: To evaluate in vitro the solvent and toxic effect of lemon peel oil (Citrus limon) according to exposure time. Its components were identified through gas chromatography. Material and Methods: The study was of experimental type in vitro. To determine the solvent effect, standardized gutta-percha cones of endodontic number 80 with taper 0.02 were used; solvents used were: xylol, lemon and orange peel essential oil; these were immersed in 2, 5 and 10 minutes (n = 8). The weight was recorded before and after the immersion to the substances evaluated to determine the loss of mass. To evaluate the toxicity, Artemias Franciscan were used through the medium lethal concentration; Gas chromatography was used to obtain the components of each oil. The ANOVA / Tukey analysis was used to compare the solvent effect between the substances. Results: No significant diff...

Introduction: Mini screws are devices used to optimize anchorage in orthodontics, and are fixed in the bone structure. Case of report: We present the case of a patient who came to the oral and maxillofacial surgery office due to the accidental introduction of a mini orthodontic screw into the maxillary sinus; a tomographic evaluation was requested, determining the thickening of the Schneider membrane and the presence of the foreign body inside it. The Caldwell-Luc surgical technique was performed and the mini screw was located and removed. Subsequent complications were pain on touch and paresthesia; a laser therapy with photobiomodulation was performed, and both pain and paresthesia were resolved. Conclusion: One year after surgery, the patient was asymptomatic and without paresthesia, the control tomography verified absence of Schneider's membrane thickening and permeable anatomical rep...