[The surface of various files of quadrangular, triangular and rhomboidal section using scanning electron microscopy]

Area of Science:

• Materials Science
• Biomaterials Engineering
• Dental Materials

Context:

• Dental files are critical instruments in endodontic procedures.
• The quality of endodontic files directly influences treatment success and patient safety.
• Variations in file design and manufacturing can lead to surface imperfections.

Purpose:

• To investigate and characterize surface defects in endodontic files.
• To evaluate the prevalence of defects across different brands, calibres, and cross-sectional shapes.
• To identify factors influencing the occurrence and visibility of surface imperfections.

Summary:

• Scanning electron microscopy revealed surface defects on 45 endodontic files from 5 brands.
• Observed defects included metallic fragments, burrs, deformed teeth, pores, and ridges.
• Defects were more pronounced in smaller diameter files and those with triangular or rhomboidal cross-sections.

Impact:

• Highlights potential manufacturing inconsistencies in endodontic files.
• Suggests that file geometry (diameter, cross-section) may affect surface integrity.
• Informs clinicians about potential limitations and aids in selecting higher-quality instruments.