Examinando por Materia "Poste de fibra de vidrio"

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Acceso abierto
Comparison of the strength of joining fiberglass posts to the root canal of a universal adhesive with and without acid
(Universidad Privada Norbert Wiener, 2019-11-05) Reyes Erquinigo, Carmen Rosa; Nazario Riquero, Renzo Nicolás
The objective of this study was to determine the bond strength of fiberglass posts to the root canal using a universal adhesive with and without acid etching. A total of 26 single-rooted premolars were studied. The crowns of the teeth were removed, leaving a root portion length of 14mm. Endodontic treatment was performed, filling 4mm of the canal, followed by biomechanical preparation of the canal for post cementation. The teeth were divided into two groups of 13 teeth each. In the first group, 37% phosphoric acid was applied for 15 seconds, followed by the universal adhesive Ambar (FGM), the All Cem cement (FGM), and the White post fiberglass post (FGM), all according to the manufacturer's recommendations. In the second group, the same protocol was followed, except that acid etching was omitted. Cross-sectional cuts of 1mm were made, with two cuts per third (cervical, middle, and apical). Each cut was tested using a universal testing machine (Pushot) to evaluate bond strength. Results: The average bond strength in the acid-etched group was 8.453 MPa, and in the non-etched group, the average bond strength was 8.76 MPa. Conclusion: No significant differences were found between both groups in terms of bond strength.
Acceso abierto
In vitro evaluation of resistance to bending on three types of poles fiberglass of different brands, refor post (ángelus), fiber post (maquira) and medical micro (simplex), Lima 2022
(Universidad Privada Norbert Wiener, 2023-10-03) Vásquez Melgarejo, Leidy; Rojas Ortega, Raúl Antonio
The aim of this research was to compare the flexural strength of three brands of fiberglass posts: Fiber Post (Maquira), Refor Post (Ángelus), and Micro Medica (Simplex). An in vitro, comparative, prospective, and cross-sectional study was conducted with 30 fiberglass posts from three brands: Fiber Post (Maquira), Refor Post (Ángelus), and Micro Medica (Simplex), divided into three subgroups, each consisting of 10 fiberglass posts. Flexural strength was determined using a universal testing machine. Numerical values were collected using a data collection form, and the data was analyzed using the SPSS version 22.0 statistical software. The results showed that the flexural strength of the Refor Post fiberglass post had an average of 887.49 MPa, followed by Fiber Post and Micro Medica with averages of 798.91 MPa and 607.75 MPa, respectively. In conclusion, the Refor Post fiberglass post showed superior resistance compared to the Fiber Post and Micro Medica brands.