Comparación de dos marcas comerciales de postes de fibra de vidrio realizados sobre premolares examinando la resistencia mecánica a la fractura

Abstract

This study aimed to evaluate and compare the mechanical fracture resistance of two different brands of fiberglass posts used in the dental clinic of Santo Tomás University, Floridablanca campus. Fiberglass posts play an important role in the rehabilitation of endodontically treated teeth because they provide support, stability, and proper distribution of occlusal forces, helping to preserve the remaining dental structure and improve the longevity of restorations. An in vitro experimental study was conducted using a sample of 60 maxillary first premolars obtained from the university’s tooth bank. The specimens were divided into three groups: 20 teeth restored with the first brand of fiberglass posts, 20 restored with the second brand, and 20 teeth assigned to the control group. All teeth underwent endodontic treatment followed by the corresponding rehabilitation procedure. Subsequently, the samples were subjected to vertical compressive load tests to determine their fracture resistance and compare the mechanical performance of the different groups. The results demonstrated the behavior of the fiberglass post groups under vertical compressive forces. However, statistical analysis revealed that none of the observed effects were statistically significant. These findings indicate that there is insufficient evidence to conclude that either brand has a significant influence on peak load capacity or fracture resistance when compared with the control group. Therefore, under the conditions of this study, both fiberglass post systems exhibited similar mechanical performance. In conclusion, the two evaluated brands of fiberglass posts showed comparable resistance to vertical compressive forces and fracture. Since no significant differences were found between them, the selection of a specific brand should not be based solely on mechanical resistance. Instead, clinicians should consider other relevant factors, including the patient’s clinical needs, treatment objectives, handling characteristics, availability, and expected conditions of use. Careful assessment of these factors will help dental professionals choose the most appropriate fiberglass post system and achieve optimal outcomes in the rehabilitation of endodontically treated teeth.