Effect of Erbium laser surface treatment of glass fiber posts on their bond strength to intra-radicular dentin at different root levels

Document Type : Original Article

Authors

1 Fixed Prosthodontics, Minia University, Minia, Egypt

2 Lecturer of Fixed Prosthodontics, Faculty of Dentistry, Minia University, Minia, Egypt.

3 Lecturer of Fixed Prosthodontics, Faculty of Dentistry, Minia University, Minia, Egypt

Abstract

Objective:
This study aimed to assess the pull-out bond strength of glass fiber posts to root dentin after varying surface treatments with the Er-Cr:YSGG laser.
Materials and Methods:
Eighteen (n=18) single-rooted upper central incisors that had been extracted recently. All root canals were underwent endodontic treatment and post spaces were prepared for fiber posts. The specimens were then divided into three groups based on the surface treatment of the fiber post, group 1 ( Control group) (n=6) fiber posts were etched with 9.5% hydrofluoric acid and then coated with silane, while group 2 (n=6) fiber posts were laser irritated with Er-Cr:YSGG laser 2W and group 3 (n=6) fiber posts were laser irritated with Er-Cr:YSGG laser 3W. An scanning electron microscope (SEM) was used to inspect every surface of the post. According to manufacturer instructions, we used self-adhesive resin cement to bond all of the posts.After that, the samples underwent a pull-out test with a universal testing machine. In the end, the data were statistically analyzed.

Results:
The result showed that group (2) was higher bond strength than group (1). Group (2) had the highest bond strength, followed by group (3), while group (1) (control group) had the lowest. The mean pull-out value (P=0.382) indicated no statistically significant difference.
Conclusion:
The bond strength of fiber posts treated with a 2W Er-Cr:YSGG laser was better than the fiber posts subjected to conventional surface treatment.

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Egyptian Dental Journal
Volume 71, Issue 3 - Serial Number 4
Fixed Prosthodontics, Removable Prosthodontics and Dental Materials
July 2025
Pages 2247-2255

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