Chemical Degradation of Cementing Agents of Intraradicular Fiberglass Posts

Valentim ERND, Frank AGM and Heggendorn AA

Published on: 2023-09-12

Abstract

objectives

The study aimed to investigate the degrading potential of different solutions and acids at the cementing resin interface between intraradicular fiberglass posts and root canal walls and their quality. Methods: A total of 66 endodontically prepared single-rooted teeth were cemented with intraradicular fiberglass pins and radiographed in the mesiodistal (G.M-D) and vestibulo-lingual (G.V-L) directions. The resin cementing interface was evaluated visually and by digital image processing. Twenty-eight sectioned teeth formed the proof bodies (PBs), which we measured and weighed for the register of sorption properties, solubility, and mass loss after immersion, in saline solution, 37% phosphoric acid, 9%, and 10% hydrofluoric acid, xylol, eucalyptol and EDTA. Another 18 teeth were analyzed in digital microtomography. Results: The radiographic analyses identified differences in the presence of defects in the cementing interface between the G.M-D and G.V-L groups, with a greater area and a greater number of particles with defects in the first group. Solubility and mass loss showed a statistically significant difference in PBs exposed to 37% phosphoric acid concerning the other solutions. Conclusion: The solution with the greatest degrading potential in the cementing interface, in the fiberglass pin, in the resin cement and dentin, is 37% phosphoric acid.patient.