Efecto del ácido fluorhídrico sobre la superficie de postes de fibra de vidrio.

The main objective of this research study entitled "Efecto del ácido fluorhídrico sobre la superficie de postes de fibra de vidrio" aims to examine the impact of hydrofluoric acid on the surface of fiberglass posts, considering different periods of acid treatment in the dental field. The methodological approach adopted is qualitative-quantitative and quasi- experimental, with an analytical-descriptive orientation based on a literature review of 48 articles from various indexed sources such as PubMed, Scielo, and Scopus. An in vitro study was also carried out using 45 samples of fiberglass poles, subjected to acid etching with hydrofluoric acid in three different groups with exposure times of 20, 40, and 60 seconds. The numerical measurement focused on assessing the degree of change on the surface of the poles after etching treatment. The results revealed that in the group exposed at 20 seconds, a value of 689 nm was observed, indicating a reduction in porosity. At 40 seconds, a value of 873.98 nm was reached, reflecting a medium level of porosity, while at 60 seconds a value of 1816.52 nm was obtained, indicating high porosity. In conclusion, it was determined that the group exposed at 20 seconds presented a lower amount of pores compared to the 60-second group, which exhibited a higher amount of pores with increased pore size and depth. At all-time intervals, partial removal of the glass matrix, fracture of glass fibers, and a marked increase in surface roughness were evident.

• 1. Verfasser: Ramírez Vilema, Dayanna Mishell (author)
• Weitere Verfasser: Samaniego Samaniego, Karla Guadalupe (author)
• Format: bachelorThesis
• Sprache: spa
• Veröffentlicht: 2024
• Schlagworte: Ácido fluorhídrico; Adhesión; Grabado ácido; Postes de fibra de vidrio
• Online Zugang: http://dspace.unach.edu.ec/handle/51000/12560