Cambios de resistencia compresiva en las siliconas de adición manipuladas con diferentes elementos de protección personal

Abstract

Introduction: Impression materials in dentistry have been improving over the years, through these, we obtain a negative copy of the patient's teeth to obtain a positive reproduction. One of the most used impression materials due to its stability, high reproducibility in dental tissues and structures are addition silicones, however, these can present alterations in their properties when they are mishandled by the dentist. The manufacturer's recommendation indicates that the handling of this material should be carried out without barriers, but it is important for the clinician and the patient to comply with biosafety standards during handling to avoid cross contamination. Objective: To describe the changes that occur in the compressive strength of 3M ESPE Express ™ addition silicone during the polymerization process. Objective: To describe the changes that occur in the compressive strength of 3M ESPE Express ™ addition silicone during the polymerization process. Methodology: It is a descriptive observational cross-sectional study, 30 addition silicone preparations were carried out as indicated by the commercial company, the preparations are divided into five groups, one group without barrier, one with latex gloves, one with prior latex gloves use of glycerinated alcohol, one with polyethylene gloves and one with vinyl gloves. A portion of 2.2gr silicone was used for each test, mixing until a uniform consistency was achieved, dispensing it in an acrylic bucket, after its polymerization it is removed from the bucket, each preparation is taken to the Shimadzu model SW-4 type of resistance machine of materials, the resistance of the material was recorded with each of the barriers used in three times 6 minutes, 1 hour and at 24 hours, a repetition test was taken, for a total of 30 tests carried out. Conclusions: the addition silicones show alterations in the compressive resistance during the polymerization process when they are handled with latex gloves, when registering a reduction in the compressive resistance. The compressive strength of the addition silicones is less affected when it is handled with vinyl gloves and with polyethylene gloves with respect to the other protection barriers. The highest value of compressive strength is evident 24 hours after the preparation of the addition silicone. The surfactant and powder present in the latex glove do not produce a significant polymerization inhibitory effect.