Análisis de las alteraciones estructurales y superficiales de las limas del sistema reciproc blue® en dientes con curvaturas leves a moderadas (segunda fase)

Abstract

Objective: To determine superficial and structural changes of the file Reciproc Blue® R25 files (VDW, Munich, Germany), after negotiation and sterilization of the 84 root canals with curvatures from mild to moderate using (x-ray microdifractometry and scanning electron microscopy) Method: 15 reciproc blue instrument were assessed; they were divided into control group: one R25 new and Group 1: fourteen R25 used in 9 and 12 root canals. One experienced operator performed the negotiation using an endodontic electronic motor device (X Smart IQ) in 84 human extracted teeth with moderate root canal curvatures. Disinfection and sterilization processes were done and SEM to 200X y 400X was performed to the 9 and 12 uses. Results: Major irregularities on the blade edge were evident on the microscopy assess at the 10th second of use SEM showed a boost of martensite while the number of clinical uses increased. Conclusion: At the initial stage of the study was concluded that there were minimal structural modifications in the instruments derived to tensional and compression forces within the root canal at the 6th use. At the second stage of the study was concluded that the alterations found were grater due to major number of uses.